SEC Info  
    Home      Search      My Interests      Help      Sign In      Please Sign In

Forum Energy Technologies, Inc. – ‘10-Q’ for 9/30/19 – ‘EX-101.DEF’

On:  Wednesday, 10/30/19, at 3:58pm ET   ·   For:  9/30/19   ·   Accession #:  1401257-19-164   ·   File #:  1-35504

Previous ‘10-Q’:  ‘10-Q’ on 7/31/19 for 6/30/19   ·   Next:  ‘10-Q’ on 5/8/20 for 3/31/20   ·   Latest:  ‘10-Q’ on 11/3/23 for 9/30/23

Find Words in Filings emoji
 
  in    Show  and   Hints

  As Of               Filer                 Filing    For·On·As Docs:Size

10/30/19  Forum Energy Technologies, Inc.   10-Q        9/30/19   78:13M

Quarterly Report   —   Form 10-Q   —   Sect. 13 / 15(d) – SEA’34
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-Q        Quarterly Report                                    HTML   1.51M 
 2: EX-31.1     Certification -- §302 - SOA'02                      HTML     28K 
 3: EX-31.2     Certification -- §302 - SOA'02                      HTML     28K 
 4: EX-32.1     Certification -- §906 - SOA'02                      HTML     25K 
 5: EX-32.2     Certification -- §906 - SOA'02                      HTML     25K 
72: R1          Cover Page                                          HTML     79K 
29: R2          Condensed Consolidated Statements of Comprehensive  HTML    111K 
                Loss (Unaudited)                                                 
22: R3          Condensed Consolidated Statements of Comprehensive  HTML     25K 
                Loss (Unaudited) (Parenthetical)                                 
41: R4          Condensed Consolidated Balance Sheets (Unaudited)   HTML    124K 
71: R5          Condensed Consolidated Balance Sheets (Unaudited)   HTML     35K 
                (Parenthetical)                                                  
28: R6          Condensed Consolidated Statements of Cash Flows     HTML    120K 
                (Unaudited)                                                      
21: R7          Condensed Consolidated Statements of Changes in     HTML     95K 
                Stockholders' Equity (Unaudited)                                 
42: R8          Organization and Basis of Presentation              HTML     31K 
70: R9          Recent Accounting Pronouncements                    HTML     36K 
39: R10         Revenue                                             HTML     52K 
18: R11         Acquisitions & Dispositions                         HTML     41K 
55: R12         Inventories                                         HTML     36K 
66: R13         Goodwill and Intangible Assets                      HTML     96K 
38: R14         Debt                                                HTML     48K 
17: R15         Leases                                              HTML    194K 
54: R16         Income Taxes                                        HTML     29K 
65: R17         Fair Value Measurements                             HTML     28K 
40: R18         Business Segments                                   HTML    148K 
16: R19         Commitments and Contingencies                       HTML     25K 
45: R20         Earnings Per Share                                  HTML     51K 
74: R21         Stockholders' Equity                                HTML     26K 
27: R22         Related Party Transactions                          HTML     24K 
20: R23         Condensed Consolidating Financial Statements        HTML    620K 
44: R24         Recent Accounting Pronouncements (Policies)         HTML     36K 
73: R25         Revenue (Tables)                                    HTML     47K 
26: R26         Acquisitions & Dispositions (Tables)                HTML     33K 
19: R27         Inventories (Tables)                                HTML     37K 
43: R28         Goodwill and Intangible Assets (Tables)             HTML     93K 
75: R29         Debt (Tables)                                       HTML     38K 
68: R30         Leases (Tables)                                     HTML    144K 
57: R31         Business Segments (Tables)                          HTML    151K 
14: R32         Earnings Per Share (Tables)                         HTML     51K 
36: R33         Condensed Consolidating Financial Statements        HTML    814K 
                (Tables)                                                         
69: R34         Organization and Basis of Presentation - Narrative  HTML     30K 
                (Details)                                                        
59: R35         Recent Accounting Pronouncements (Details)          HTML     29K 
15: R36         Revenue - Narrative (Details)                       HTML     28K 
37: R37         Revenue - Schedule of Changes in Contract Assets    HTML     46K 
                and Contract Liabilities (Details)                               
67: R38         Acquisitions & Dispositions - Narrative (Details)   HTML     74K 
60: R39         Acquisitions & Dispositions - Schedule of Assets    HTML     44K 
                Acquired and Liabilities Assumed (Details)                       
77: R40         Inventories (Details)                               HTML     37K 
46: R41         Goodwill and Intangible Assets - Schedule of        HTML     46K 
                Goodwill (Details)                                               
24: R42         Goodwill and Intangible Assets - Narrative          HTML     45K 
                (Details)                                                        
31: R43         Goodwill and Intangible Assets - Finite-Lived and   HTML     69K 
                Indefinite-Lived Intangible Assets (Details)                     
78: R44         Debt - Schedule of Long-Term Debt (Details)         HTML     44K 
47: R45         Debt - Narrative (Details)                          HTML    113K 
25: R46         Leases - Narrative (Details)                        HTML     26K 
32: R47         Leases - Schedule of Lease Assets and Liabilities   HTML     40K 
                (Details)                                                        
76: R48         Leases - Schedule of Lease Costs (Details)          HTML     36K 
48: R49         Leases - Schedule of Lease Liability Maturity       HTML     85K 
                (Details)                                                        
52: R50         Leases - Schedule of Remaining Lease Term and       HTML     33K 
                Discount Rates (Details)                                         
62: R51         Leases - Schedule of Lease Cash Flows (Details)     HTML     47K 
35: R52         Income Taxes (Details)                              HTML     31K 
13: R53         Fair Value Measurements (Details)                   HTML     35K 
51: R54         Business Segments - Income Statement by Segment     HTML     61K 
                (Details)                                                        
61: R55         Business Segments - Assets by Segment (Details)     HTML     34K 
34: R56         Business Segments - Schedule of Disaggregation of   HTML     52K 
                Revenue (Details)                                                
11: R57         Business Segments - Schedule of Revenue by          HTML     39K 
                Geography (Details)                                              
50: R58         Earnings Per Share (Details)                        HTML     54K 
63: R59         Stockholders' Equity (Details)                      HTML     45K 
30: R60         Condensed Consolidating Financial Statements -      HTML    172K 
                Condensed Consolidating Statements of                            
                Comprehensive Income (Details)                                   
23: R61         Condensed Consolidating Financial Statements -      HTML    205K 
                Condensed Consolidating Balance Sheets (Details)                 
49: R62         Condensed Consolidating Financial Statements -      HTML    102K 
                Condensed Consolidating Statements of Cash Flows                 
                (Details)                                                        
64: R9999       Uncategorized Items - fet-20190930.htm              HTML     23K 
33: XML         IDEA XML File -- Filing Summary                      XML    137K 
53: XML         XBRL Instance -- fet-20190930_htm                    XML   4.54M 
56: EXCEL       IDEA Workbook of Financial Reports                  XLSX     86K 
 7: EX-101.CAL  XBRL Calculations -- fet-20190930_cal                XML    303K 
 8: EX-101.DEF  XBRL Definitions -- fet-20190930_def                 XML    623K 
 9: EX-101.LAB  XBRL Labels -- fet-20190930_lab                      XML   1.49M 
10: EX-101.PRE  XBRL Presentations -- fet-20190930_pre               XML    992K 
 6: EX-101.SCH  XBRL Schema -- fet-20190930                          XSD    160K 
58: JSON        XBRL Instance as JSON Data -- MetaLinks              326±   487K 
12: ZIP         XBRL Zipped Folder -- 0001401257-19-000164-xbrl      Zip    354K 


‘EX-101.DEF’   —   XBRL Definitions — fet-20190930_def


This Exhibit is an XBRL XML File.


                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<!-- XBRL Document Created with Wdesk from Workiva -->
<!-- Copyright 2019 Workiva -->
<!-- r:d6ce82dc-af68-43f1-a6ab-dbaff81947f4,g:0e0bf49b-e8ee-40a0-915a-38e0edc30430 -->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
<link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CoverPage" xlink:type="simple" xlink:href="fet-20190930.xsd#CoverPage"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CoverPage" xlink:type="extended" id="i042dceed683d4b83a7476091bac0d8b6_49f739a2-5cd9-4fa8-8263-5a3de60b2fae">
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInformationLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_bab451b1-5deb-44f7-82c3-da977b12080c" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_DocumentType_bab451b1-5deb-44f7-82c3-da977b12080c" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_04504c46-0d1f-4b29-8712-8f00ad01ba2f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentQuarterlyReport"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_DocumentQuarterlyReport_04504c46-0d1f-4b29-8712-8f00ad01ba2f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_d5fa98c5-bb86-4e03-9268-35ed74ff98ea" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_DocumentPeriodEndDate_d5fa98c5-bb86-4e03-9268-35ed74ff98ea" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_37b94ed7-464f-48e2-989c-7339f4a1f5c9" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentTransitionReport"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_DocumentTransitionReport_37b94ed7-464f-48e2-989c-7339f4a1f5c9" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_b2d47fa0-b5cd-4de7-a111-1a7536a36bae" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityFileNumber_b2d47fa0-b5cd-4de7-a111-1a7536a36bae" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_f6520001-7128-4f4b-b57f-96cd9ff2a43e" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityRegistrantName_f6520001-7128-4f4b-b57f-96cd9ff2a43e" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_b7542043-53f5-4296-a973-e25e385b8594" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityIncorporationStateCountryCode_b7542043-53f5-4296-a973-e25e385b8594" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_32071fde-8a6b-4492-ac04-36fe29a0ccc4" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityTaxIdentificationNumber_32071fde-8a6b-4492-ac04-36fe29a0ccc4" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_1889e00f-7b86-4369-998e-bf97de93e6e1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityAddressAddressLine1_1889e00f-7b86-4369-998e-bf97de93e6e1" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_033dc842-ac33-4d92-a4be-6c6e720223b4" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine2"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityAddressAddressLine2_033dc842-ac33-4d92-a4be-6c6e720223b4" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_d591f5f9-ad02-43b3-84c5-f323c87ab0cd" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityAddressCityOrTown_d591f5f9-ad02-43b3-84c5-f323c87ab0cd" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_6a076fdc-00cb-4504-8cac-03b243a3ef33" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityAddressStateOrProvince_6a076fdc-00cb-4504-8cac-03b243a3ef33" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_b482dfe7-62bc-4f67-a7ae-01ceebceb766" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityAddressPostalZipCode_b482dfe7-62bc-4f67-a7ae-01ceebceb766" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_b0b6f8d6-bb8b-4110-a341-beaf5b20541f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_CityAreaCode_b0b6f8d6-bb8b-4110-a341-beaf5b20541f" xlink:type="arc" order="13"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_d45ca7a0-758b-42a1-8aa4-e66299176cf8" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_LocalPhoneNumber_d45ca7a0-758b-42a1-8aa4-e66299176cf8" xlink:type="arc" order="14"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_7e230374-dd87-460c-8bd6-51b9729284f8" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_Security12bTitle_7e230374-dd87-460c-8bd6-51b9729284f8" xlink:type="arc" order="15"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_3aafe152-6f07-4966-809f-cf0177c16ee7" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_TradingSymbol_3aafe152-6f07-4966-809f-cf0177c16ee7" xlink:type="arc" order="16"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_1eb04fa8-97c4-4aad-b3a5-38cffc936f63" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_SecurityExchangeName_1eb04fa8-97c4-4aad-b3a5-38cffc936f63" xlink:type="arc" order="17"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_389bfe81-7bab-47eb-affc-f3df8f714131" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCurrentReportingStatus"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityCurrentReportingStatus_389bfe81-7bab-47eb-affc-f3df8f714131" xlink:type="arc" order="18"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_15298131-af0b-48ef-a7a3-4ae1daab24e2" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInteractiveDataCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityInteractiveDataCurrent_15298131-af0b-48ef-a7a3-4ae1daab24e2" xlink:type="arc" order="19"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_fff6d7d2-ee83-4691-8e55-90e1f34bdb20" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityFilerCategory_fff6d7d2-ee83-4691-8e55-90e1f34bdb20" xlink:type="arc" order="20"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_ef2753f2-7eb9-432d-b9b3-ddc29164d9ca" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitySmallBusiness"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntitySmallBusiness_ef2753f2-7eb9-432d-b9b3-ddc29164d9ca" xlink:type="arc" order="21"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_ec396498-9846-45dc-95f4-928364b5d6d1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityEmergingGrowthCompany_ec396498-9846-45dc-95f4-928364b5d6d1" xlink:type="arc" order="22"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_df987830-f56e-4872-a2ec-caa306298dab" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityShellCompany"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityShellCompany_df987830-f56e-4872-a2ec-caa306298dab" xlink:type="arc" order="23"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_e05ddbfb-bbb7-49ec-a3d2-8e6b69429ec7" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCommonStockSharesOutstanding"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_e05ddbfb-bbb7-49ec-a3d2-8e6b69429ec7" xlink:type="arc" order="24"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_ab2e0103-d081-4330-9bc5-587b76a755c1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntityCentralIndexKey_ab2e0103-d081-4330-9bc5-587b76a755c1" xlink:type="arc" order="25"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_e7ee59d7-c76f-4243-87dc-d80e925fa7c8" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_CurrentFiscalYearEndDate_e7ee59d7-c76f-4243-87dc-d80e925fa7c8" xlink:type="arc" order="26"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_ef7e3e46-68cf-45c8-abd2-64d59fed61cd" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalYearFocus"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_DocumentFiscalYearFocus_ef7e3e46-68cf-45c8-abd2-64d59fed61cd" xlink:type="arc" order="27"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_9dc8cb10-b4a8-4282-9462-f1ac1fcc76b0" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalPeriodFocus"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_DocumentFiscalPeriodFocus_9dc8cb10-b4a8-4282-9462-f1ac1fcc76b0" xlink:type="arc" order="28"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_741a4cc6-ad9c-43b5-aa47-33cf3415715d" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_AmendmentFlag_741a4cc6-ad9c-43b5-aa47-33cf3415715d" xlink:type="arc" order="29"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_5850aae8-c65b-41d7-b767-264215599871" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitiesTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_fa81d8de-b009-40ab-b8a9-ce7e6a6f13ba" xlink:to="loc_dei_EntitiesTable_5850aae8-c65b-41d7-b767-264215599871" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_EntityListingsExchangeAxis_e74557c1-9c5d-4d9c-9fc7-bbe2fdb63ba2" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityListingsExchangeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_5850aae8-c65b-41d7-b767-264215599871" xlink:to="loc_dei_EntityListingsExchangeAxis_e74557c1-9c5d-4d9c-9fc7-bbe2fdb63ba2" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_ExchangeDomain_e74557c1-9c5d-4d9c-9fc7-bbe2fdb63ba2_default" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_ExchangeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityListingsExchangeAxis_e74557c1-9c5d-4d9c-9fc7-bbe2fdb63ba2" xlink:to="loc_dei_ExchangeDomain_e74557c1-9c5d-4d9c-9fc7-bbe2fdb63ba2_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_dei_ExchangeDomain_d3dcdb8d-5993-4d15-945e-252210c4c9f1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_ExchangeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityListingsExchangeAxis_e74557c1-9c5d-4d9c-9fc7-bbe2fdb63ba2" xlink:to="loc_dei_ExchangeDomain_d3dcdb8d-5993-4d15-945e-252210c4c9f1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_exch_XNYS_4be966e1-41c4-4b11-9804-f5e4bae6a79d" xlink:href="https://xbrl.sec.gov/exch/2019/exch-2019-01-31.xsd#exch_XNYS"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_ExchangeDomain_d3dcdb8d-5993-4d15-945e-252210c4c9f1" xlink:to="loc_exch_XNYS_4be966e1-41c4-4b11-9804-f5e4bae6a79d" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatedStatementsofComprehensiveLossUnaudited" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatedStatementsofComprehensiveLossUnaudited"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatedStatementsofComprehensiveLossUnaudited" xlink:type="extended" id="id90dcef2f6c348dc92b296a7396e6a2b_260b2796-e902-428c-bc21-7b81dd631710"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatedStatementsofComprehensiveLossUnauditedParenthetical" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatedStatementsofComprehensiveLossUnauditedParenthetical"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatedStatementsofComprehensiveLossUnauditedParenthetical" xlink:type="extended" id="i76a59c2ea7fe41c28d624243093d15cc_d54390da-71e8-4d70-951b-71c867a9831f"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatedBalanceSheetsUnaudited"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatedBalanceSheetsUnaudited" xlink:type="extended" id="i182f4ed1987e4dd68d70d8112dc53a38_e03b4445-bcc1-4d54-b52f-3ea4cf40aae7"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatedBalanceSheetsUnauditedParenthetical"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="extended" id="i916ea22039f740beab03bab867d92dce_7a44b0e3-5350-403b-ab47-06733187146b"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatedStatementsofCashFlowsUnaudited"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended" id="i47418e3548844a868bd8274039df053b_9304f4c5-1610-4201-816e-da252510efa7"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityUnaudited" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatedStatementsofChangesinStockholdersEquityUnaudited"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityUnaudited" xlink:type="extended" id="i2f4761c256964bd0b4adf5f00380fa92_8ad16afa-d59f-4d62-85b5-44c2d979748f">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_20032c83-8584-4116-8e42-ab8b77a0ceb2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_20032c83-8584-4116-8e42-ab8b77a0ceb2" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4af22974-ca1d-4e39-a24c-32c40fe01fbe" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4af22974-ca1d-4e39-a24c-32c40fe01fbe" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_84b0e949-9609-4051-a799-6b5db8f0cf39" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_84b0e949-9609-4051-a799-6b5db8f0cf39" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_b3533ef9-c023-44f0-b963-3b8b8ac39239" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_b3533ef9-c023-44f0-b963-3b8b8ac39239" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_6acd23c4-e09e-4108-8720-d29cb55f063f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_6acd23c4-e09e-4108-8720-d29cb55f063f" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_8e662c1c-a97c-42c2-8450-c3751b29fe23" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_8e662c1c-a97c-42c2-8450-c3751b29fe23" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_faaaff38-d0a1-4e25-ae4d-780967ed2e40" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_faaaff38-d0a1-4e25-ae4d-780967ed2e40" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_f860f970-6f46-41fd-be3f-a435a0c096c9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_f860f970-6f46-41fd-be3f-a435a0c096c9" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_5f7e3182-1171-4ff6-bf2f-60eae89f6e31" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_5f7e3182-1171-4ff6-bf2f-60eae89f6e31" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_71b00875-69f6-4976-857b-9bba695884ed" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_71b00875-69f6-4976-857b-9bba695884ed" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_180aa838-96b3-4a00-91b4-240a15ac6813" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_180aa838-96b3-4a00-91b4-240a15ac6813" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_93fe3204-a8b1-4efb-982e-2b887afc4e44" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_ProfitLoss_93fe3204-a8b1-4efb-982e-2b887afc4e44" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_fe85fb57-6dbe-4844-b3e2-b047de665c80" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_74dbedc1-4252-48d9-ab21-b35dc1f34153" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_fe85fb57-6dbe-4844-b3e2-b047de665c80" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_ea73bb7c-ecb8-4134-ad39-1ffbd72cd164" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_12ee91b4-47e0-4dbc-a863-077def5e9558" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_20032c83-8584-4116-8e42-ab8b77a0ceb2" xlink:to="loc_us-gaap_StatementTable_12ee91b4-47e0-4dbc-a863-077def5e9558" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_e758feab-25d2-4355-b2e7-dd5fecc1cec5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_12ee91b4-47e0-4dbc-a863-077def5e9558" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_e758feab-25d2-4355-b2e7-dd5fecc1cec5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e758feab-25d2-4355-b2e7-dd5fecc1cec5_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e758feab-25d2-4355-b2e7-dd5fecc1cec5" xlink:to="loc_us-gaap_EquityComponentDomain_e758feab-25d2-4355-b2e7-dd5fecc1cec5_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_a624486e-8a3e-41bc-89c9-198d59de8578" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e758feab-25d2-4355-b2e7-dd5fecc1cec5" xlink:to="loc_us-gaap_EquityComponentDomain_a624486e-8a3e-41bc-89c9-198d59de8578" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_f8a0a1dd-99d8-4f3d-90de-c23a8ed6ebad" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a624486e-8a3e-41bc-89c9-198d59de8578" xlink:to="loc_us-gaap_CommonStockMember_f8a0a1dd-99d8-4f3d-90de-c23a8ed6ebad" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_16f17030-627a-467b-9d65-676d2d4ed801" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a624486e-8a3e-41bc-89c9-198d59de8578" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_16f17030-627a-467b-9d65-676d2d4ed801" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_4f7f11f4-86ac-4c4d-a20e-98d807b1946f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a624486e-8a3e-41bc-89c9-198d59de8578" xlink:to="loc_us-gaap_TreasuryStockMember_4f7f11f4-86ac-4c4d-a20e-98d807b1946f" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_d16546e8-cd68-4797-ab16-fd77926dbc89" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a624486e-8a3e-41bc-89c9-198d59de8578" xlink:to="loc_us-gaap_RetainedEarningsMember_d16546e8-cd68-4797-ab16-fd77926dbc89" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_9fdcf3b8-8cd8-45a0-ab69-ed34ece1a16f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_a624486e-8a3e-41bc-89c9-198d59de8578" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_9fdcf3b8-8cd8-45a0-ab69-ed34ece1a16f" xlink:type="arc" order="4"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/OrganizationandBasisofPresentation" xlink:type="simple" xlink:href="fet-20190930.xsd#OrganizationandBasisofPresentation"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/OrganizationandBasisofPresentation" xlink:type="extended" id="i3b1e0463b08a482b82375cbca7abead0_910cdd9f-dd7f-4784-bc68-7be9840d4438"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/OrganizationandBasisofPresentationNarrativeDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#OrganizationandBasisofPresentationNarrativeDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/OrganizationandBasisofPresentationNarrativeDetails" xlink:type="extended" id="i43954b5d4b2a4134a4a4e6234ff3e9e7_262354b7-c232-4977-b1a0-a98678e5a171">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_919053a9-e1ff-4eb4-944b-024d8968c0c4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterest_e53cecd9-6308-4576-b8ad-6425cc95df4a" xlink:href="fet-20190930.xsd#fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterest"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_919053a9-e1ff-4eb4-944b-024d8968c0c4" xlink:to="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterest_e53cecd9-6308-4576-b8ad-6425cc95df4a" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_864ea97d-a0b8-4c45-94e1-fd16811bbc44" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfOperatingSegments"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_919053a9-e1ff-4eb4-944b-024d8968c0c4" xlink:to="loc_us-gaap_NumberOfOperatingSegments_864ea97d-a0b8-4c45-94e1-fd16811bbc44" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_0f310bb7-56a5-42ff-a4cc-be2ce6b5f14a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_919053a9-e1ff-4eb4-944b-024d8968c0c4" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_0f310bb7-56a5-42ff-a4cc-be2ce6b5f14a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_dde0d176-001a-4ccf-9bb1-9d7ef9b95f2c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupClassificationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_0f310bb7-56a5-42ff-a4cc-be2ce6b5f14a" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_dde0d176-001a-4ccf-9bb1-9d7ef9b95f2c" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_dde0d176-001a-4ccf-9bb1-9d7ef9b95f2c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_dde0d176-001a-4ccf-9bb1-9d7ef9b95f2c" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_dde0d176-001a-4ccf-9bb1-9d7ef9b95f2c_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_d42e2a1a-b0e5-4882-a36d-f623561e5b31" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_dde0d176-001a-4ccf-9bb1-9d7ef9b95f2c" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_d42e2a1a-b0e5-4882-a36d-f623561e5b31" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember_cd067ecf-2fb3-4565-acb5-31f765ac93a5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_d42e2a1a-b0e5-4882-a36d-f623561e5b31" xlink:to="loc_us-gaap_DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember_cd067ecf-2fb3-4565-acb5-31f765ac93a5" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_533bef5a-334d-4579-9d4b-e0ae6ae4b5fa" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_0f310bb7-56a5-42ff-a4cc-be2ce6b5f14a" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_533bef5a-334d-4579-9d4b-e0ae6ae4b5fa" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_533bef5a-334d-4579-9d4b-e0ae6ae4b5fa_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_533bef5a-334d-4579-9d4b-e0ae6ae4b5fa" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_533bef5a-334d-4579-9d4b-e0ae6ae4b5fa_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_a0215a3d-fba2-4661-b407-892bfb61b4a1" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_533bef5a-334d-4579-9d4b-e0ae6ae4b5fa" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_a0215a3d-fba2-4661-b407-892bfb61b4a1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_AshteadTechnologyMember_2310ef4b-b84f-4358-b052-0dbb3cd21f05" xlink:href="fet-20190930.xsd#fet_AshteadTechnologyMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_a0215a3d-fba2-4661-b407-892bfb61b4a1" xlink:to="loc_fet_AshteadTechnologyMember_2310ef4b-b84f-4358-b052-0dbb3cd21f05" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/RecentAccountingPronouncements" xlink:type="simple" xlink:href="fet-20190930.xsd#RecentAccountingPronouncements"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/RecentAccountingPronouncements" xlink:type="extended" id="ibafa84e5fded46ddbdce2c973e4aa3f2_fe881d5b-cad9-444a-a2f1-87b51b4df64e"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/RecentAccountingPronouncementsPolicies" xlink:type="simple" xlink:href="fet-20190930.xsd#RecentAccountingPronouncementsPolicies"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/RecentAccountingPronouncementsPolicies" xlink:type="extended" id="i0ed3fdd7087844408ce422554e948b7b_05731df6-8ee2-400c-9fff-8b23f141804a"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/RecentAccountingPronouncementsDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#RecentAccountingPronouncementsDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/RecentAccountingPronouncementsDetails" xlink:type="extended" id="i59a9d49a470740ae9960de64e1a209fb_86b4833e-f107-4aae-b672-211e45f63dc9">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_fedad424-4fee-4eec-b135-f49a8a9cb7ef" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_64579bbe-f8fe-4e4d-bb60-0127765eac7c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_fedad424-4fee-4eec-b135-f49a8a9cb7ef" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_64579bbe-f8fe-4e4d-bb60-0127765eac7c" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_7acc2fdd-a3ce-4d76-bf51-e9feee44c5d1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_fedad424-4fee-4eec-b135-f49a8a9cb7ef" xlink:to="loc_us-gaap_OperatingLeaseLiability_7acc2fdd-a3ce-4d76-bf51-e9feee44c5d1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_d4eba7f4-4a63-4f67-a50e-dd47d9939994" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_fedad424-4fee-4eec-b135-f49a8a9cb7ef" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_d4eba7f4-4a63-4f67-a50e-dd47d9939994" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_ed20d0e2-ae9e-4e8e-b2ee-459c947594fd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_d4eba7f4-4a63-4f67-a50e-dd47d9939994" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_ed20d0e2-ae9e-4e8e-b2ee-459c947594fd" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_ed20d0e2-ae9e-4e8e-b2ee-459c947594fd_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_ed20d0e2-ae9e-4e8e-b2ee-459c947594fd" xlink:to="loc_us-gaap_TypeOfAdoptionMember_ed20d0e2-ae9e-4e8e-b2ee-459c947594fd_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_e52fd371-2710-4130-b1ff-fe4c2c2d0f7c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfAdoptionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_ed20d0e2-ae9e-4e8e-b2ee-459c947594fd" xlink:to="loc_us-gaap_TypeOfAdoptionMember_e52fd371-2710-4130-b1ff-fe4c2c2d0f7c" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_18e1cf0d-bd4f-4329-99c1-c7dcf57e61eb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_e52fd371-2710-4130-b1ff-fe4c2c2d0f7c" xlink:to="loc_us-gaap_AccountingStandardsUpdate201602Member_18e1cf0d-bd4f-4329-99c1-c7dcf57e61eb" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/Revenue" xlink:type="simple" xlink:href="fet-20190930.xsd#Revenue"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/Revenue" xlink:type="extended" id="i579856683444497dbc8eb9bb6d797af8_ce13bec0-e9fc-4a63-91e7-ae2331278e1d"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/RevenueTables" xlink:type="simple" xlink:href="fet-20190930.xsd#RevenueTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/RevenueTables" xlink:type="extended" id="i5c3c3501148a4878b97392593f90d736_6157550c-c6ad-4a75-8b66-870adf769a44"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/RevenueNarrativeDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#RevenueNarrativeDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/RevenueNarrativeDetails" xlink:type="extended" id="i5bc0fb258f6f48c49be4317cba140170_831b451a-3d0c-45a7-9699-83d4961f464a"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/RevenueScheduleofChangesinContractAssetsandContractLiabilitiesDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#RevenueScheduleofChangesinContractAssetsandContractLiabilitiesDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/RevenueScheduleofChangesinContractAssetsandContractLiabilitiesDetails" xlink:type="extended" id="ie433c877929e4561835877ca0ac94589_5a5d2628-5b7d-4480-8ef1-fbf7b5c2c79b"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/AcquisitionsDispositions" xlink:type="simple" xlink:href="fet-20190930.xsd#AcquisitionsDispositions"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/AcquisitionsDispositions" xlink:type="extended" id="i295b40f5370d49b3a1e6f355e5db241e_02788a1e-e4c3-42a5-85f0-7e6b7d96d9fe"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/AcquisitionsDispositionsTables" xlink:type="simple" xlink:href="fet-20190930.xsd#AcquisitionsDispositionsTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/AcquisitionsDispositionsTables" xlink:type="extended" id="ib3d415d6b8ea482ab4236208a797d9dd_de5bad2f-a158-48d3-bb0e-32c8c10d3f4c"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/AcquisitionsDispositionsNarrativeDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#AcquisitionsDispositionsNarrativeDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/AcquisitionsDispositionsNarrativeDetails" xlink:type="extended" id="i7c9a588c99db483c9411fcb56c8a5fdc_dc90b2b3-88ce-49dc-8322-09b55ee1bb56">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_9df6d4bd-5148-4efd-9be0-9e8d2b779c74" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_9df6d4bd-5148-4efd-9be0-9e8d2b779c74" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_650add09-61cb-4cba-b64e-abced9f98ec0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_650add09-61cb-4cba-b64e-abced9f98ec0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_24a0fd47-f738-4a33-addd-7dd4ad581c42" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_24a0fd47-f738-4a33-addd-7dd4ad581c42" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_43b7bbfc-416c-4733-b13a-0f674a15f7bf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_43b7bbfc-416c-4733-b13a-0f674a15f7bf" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterest_33614e0d-2832-4fdd-8f9b-3dbf77aa9511" xlink:href="fet-20190930.xsd#fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterest"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterest_33614e0d-2832-4fdd-8f9b-3dbf77aa9511" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationNoteReceivable_4d83c694-ca0f-4fcd-aabb-4e7b82cdaed6" xlink:href="fet-20190930.xsd#fet_DisposalGroupIncludingDiscontinuedOperationConsiderationNoteReceivable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationNoteReceivable_4d83c694-ca0f-4fcd-aabb-4e7b82cdaed6" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_1b9cdd7d-19dc-4236-8c2e-4b54d5a402cd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_1b9cdd7d-19dc-4236-8c2e-4b54d5a402cd" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_4e3b917d-67ba-4495-820d-e23913f99e12" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_4e3b917d-67ba-4495-820d-e23913f99e12" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainOrLossOnSaleOfPreviouslyUnissuedStockByEquityInvestee_af0dfbdc-be79-49a5-b46d-0ff9ab191427" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainOrLossOnSaleOfPreviouslyUnissuedStockByEquityInvestee"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_GainOrLossOnSaleOfPreviouslyUnissuedStockByEquityInvestee_af0dfbdc-be79-49a5-b46d-0ff9ab191427" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationCash_f4bc504e-c79e-41fc-a64f-99797999983c" xlink:href="fet-20190930.xsd#fet_DisposalGroupIncludingDiscontinuedOperationConsiderationCash"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationCash_f4bc504e-c79e-41fc-a64f-99797999983c" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_f6a0cdb4-66e3-4535-b698-14e058ef63a4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_f6a0cdb4-66e3-4535-b698-14e058ef63a4" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_1d56f0b3-ddb3-4780-8a4f-03f25a660d61" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_1d56f0b3-ddb3-4780-8a4f-03f25a660d61" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterestFairValue_40ea1e56-8fb3-4975-a0cb-0a221f552efa" xlink:href="fet-20190930.xsd#fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterestFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_fet_DisposalGroupIncludingDiscontinuedOperationConsiderationEquityOwnershipInterestFairValue_40ea1e56-8fb3-4975-a0cb-0a221f552efa" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ee53dc85-c9ee-44db-86f9-0b2f7536e73d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_f76b2aa7-29a2-4196-b0c6-aa11a1ee461e" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ee53dc85-c9ee-44db-86f9-0b2f7536e73d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_64986f7c-16cf-4b08-b97d-8b3d3200f16b" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ee53dc85-c9ee-44db-86f9-0b2f7536e73d" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_64986f7c-16cf-4b08-b97d-8b3d3200f16b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_64986f7c-16cf-4b08-b97d-8b3d3200f16b_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_64986f7c-16cf-4b08-b97d-8b3d3200f16b" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_64986f7c-16cf-4b08-b97d-8b3d3200f16b_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_cf93f08a-9df0-499a-b8ca-806762c2ab68" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_EquityMethodInvesteeNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_64986f7c-16cf-4b08-b97d-8b3d3200f16b" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_cf93f08a-9df0-499a-b8ca-806762c2ab68" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_AshteadTechnologyMember_397d2bc8-6115-4624-b6a1-2bfccbb4a726" xlink:href="fet-20190930.xsd#fet_AshteadTechnologyMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_cf93f08a-9df0-499a-b8ca-806762c2ab68" xlink:to="loc_fet_AshteadTechnologyMember_397d2bc8-6115-4624-b6a1-2bfccbb4a726" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_95b447f9-172e-4fb3-8170-e37d70b1773d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupClassificationAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ee53dc85-c9ee-44db-86f9-0b2f7536e73d" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_95b447f9-172e-4fb3-8170-e37d70b1773d" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_95b447f9-172e-4fb3-8170-e37d70b1773d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_95b447f9-172e-4fb3-8170-e37d70b1773d" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_95b447f9-172e-4fb3-8170-e37d70b1773d_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_6d8dcabf-31e8-4645-ab3f-ebe2999f8e5d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_95b447f9-172e-4fb3-8170-e37d70b1773d" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_6d8dcabf-31e8-4645-ab3f-ebe2999f8e5d" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember_086edb4e-6284-45d2-be29-aabaff1c7aff" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_6d8dcabf-31e8-4645-ab3f-ebe2999f8e5d" xlink:to="loc_us-gaap_DisposalGroupHeldForSaleOrDisposedOfBySaleNotDiscontinuedOperationsMember_086edb4e-6284-45d2-be29-aabaff1c7aff" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_6ff06268-cd26-4928-85c9-025b80a2b6a0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_ee53dc85-c9ee-44db-86f9-0b2f7536e73d" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_6ff06268-cd26-4928-85c9-025b80a2b6a0" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6ff06268-cd26-4928-85c9-025b80a2b6a0_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_6ff06268-cd26-4928-85c9-025b80a2b6a0" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6ff06268-cd26-4928-85c9-025b80a2b6a0_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_384285f6-b16a-4530-90b4-d3537857a6cb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_6ff06268-cd26-4928-85c9-025b80a2b6a0" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_384285f6-b16a-4530-90b4-d3537857a6cb" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_HoustonGlobalHeatTransferLLCMember_5b582d58-201a-4b89-8ba0-7a1c926c71ce" xlink:href="fet-20190930.xsd#fet_HoustonGlobalHeatTransferLLCMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_384285f6-b16a-4530-90b4-d3537857a6cb" xlink:to="loc_fet_HoustonGlobalHeatTransferLLCMember_5b582d58-201a-4b89-8ba0-7a1c926c71ce" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ESPCompletionTechnologiesLLCMember_4b6c507f-d34c-4812-9619-b86b5c2cbd0f" xlink:href="fet-20190930.xsd#fet_ESPCompletionTechnologiesLLCMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_384285f6-b16a-4530-90b4-d3537857a6cb" xlink:to="loc_fet_ESPCompletionTechnologiesLLCMember_4b6c507f-d34c-4812-9619-b86b5c2cbd0f" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/AcquisitionsDispositionsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#AcquisitionsDispositionsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/AcquisitionsDispositionsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="extended" id="i3d02013f28f64d01b8c64290304c11ed_f9f2f4be-edc3-4822-a56f-44d32473c68b">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_161cdc43-4033-4168-b796-ca3270317bc5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_161cdc43-4033-4168-b796-ca3270317bc5" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_42cc69a0-b1c9-47e7-85b4-f5427b7b4e02" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_42cc69a0-b1c9-47e7-85b4-f5427b7b4e02" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets_6420fed2-3e8c-47bf-9a86-b652af82408d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets_6420fed2-3e8c-47bf-9a86-b652af82408d" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_468a628e-5f42-4cba-929f-579192ea80b1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_468a628e-5f42-4cba-929f-579192ea80b1" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_50cd63cf-a2e2-4d41-8e3e-04552e444ef3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_50cd63cf-a2e2-4d41-8e3e-04552e444ef3" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_26955b9e-b350-4b42-ba46-1d2f6eb4be24" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_26955b9e-b350-4b42-ba46-1d2f6eb4be24" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_118fb721-e582-45d3-bfdb-9e5dc0b4ed29" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities_118fb721-e582-45d3-bfdb-9e5dc0b4ed29" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_31bdf1c6-eb92-44e4-bb5c-1fcdbd4c68b3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_31bdf1c6-eb92-44e4-bb5c-1fcdbd4c68b3" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_67600460-e7dc-4b4d-979a-723f7104bd39" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_eb1c91b9-80ce-458a-89c2-f5cf8673bfe4" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_67600460-e7dc-4b4d-979a-723f7104bd39" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_825b868d-5390-4b95-b408-37cc6fba819d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_67600460-e7dc-4b4d-979a-723f7104bd39" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_825b868d-5390-4b95-b408-37cc6fba819d" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_825b868d-5390-4b95-b408-37cc6fba819d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_825b868d-5390-4b95-b408-37cc6fba819d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_825b868d-5390-4b95-b408-37cc6fba819d_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_79463841-c8c1-49a4-bc06-d40c132ddb90" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_825b868d-5390-4b95-b408-37cc6fba819d" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_79463841-c8c1-49a4-bc06-d40c132ddb90" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_HoustonGlobalHeatTransferLLCMember_2d9bbb91-81b1-4aab-b949-ad1a2abfd0e0" xlink:href="fet-20190930.xsd#fet_HoustonGlobalHeatTransferLLCMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_79463841-c8c1-49a4-bc06-d40c132ddb90" xlink:to="loc_fet_HoustonGlobalHeatTransferLLCMember_2d9bbb91-81b1-4aab-b949-ad1a2abfd0e0" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/Inventories" xlink:type="simple" xlink:href="fet-20190930.xsd#Inventories"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/Inventories" xlink:type="extended" id="ibcd341fe93e849a08b564780b6c74e75_50fddea8-4c2b-4a21-8182-8adc0beecf9a"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/InventoriesTables" xlink:type="simple" xlink:href="fet-20190930.xsd#InventoriesTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/InventoriesTables" xlink:type="extended" id="i3c7df1cd91354e7bb27448d0949f6142_f4247a1a-3ab6-4b5e-a8c4-c253715d66cc"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/InventoriesDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#InventoriesDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/InventoriesDetails" xlink:type="extended" id="if713a55ab2a1483898efca946d3c682f_b298b161-da99-4af6-b447-a433dbc1e4b9"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/GoodwillandIntangibleAssets" xlink:type="simple" xlink:href="fet-20190930.xsd#GoodwillandIntangibleAssets"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/GoodwillandIntangibleAssets" xlink:type="extended" id="i1187793d1f1d4ff2b8662e53ff272b61_6932e891-73be-4729-8594-ed43e9d70ec7"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/GoodwillandIntangibleAssetsTables" xlink:type="simple" xlink:href="fet-20190930.xsd#GoodwillandIntangibleAssetsTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/GoodwillandIntangibleAssetsTables" xlink:type="extended" id="i762c211e610e44b8857333e8095c9868_577a39ce-ed3a-4f72-8393-7d7176f46bb4"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/GoodwillandIntangibleAssetsScheduleofGoodwillDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#GoodwillandIntangibleAssetsScheduleofGoodwillDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/GoodwillandIntangibleAssetsScheduleofGoodwillDetails" xlink:type="extended" id="i05e0d7b44d0a4aeca80adeab9362c8cb_69655371-35bc-4a52-8fee-f015b903625e">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_e1a2a8ae-3890-43b6-b20b-205fb22d5aed" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_fff6e6cc-d8c7-422e-bfe8-1e3b845df89d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillRollForward"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_e1a2a8ae-3890-43b6-b20b-205fb22d5aed" xlink:to="loc_us-gaap_GoodwillRollForward_fff6e6cc-d8c7-422e-bfe8-1e3b845df89d" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_ff0658de-ef31-4e6b-8537-807675880901" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_fff6e6cc-d8c7-422e-bfe8-1e3b845df89d" xlink:to="loc_us-gaap_Goodwill_ff0658de-ef31-4e6b-8537-807675880901" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_67b0ee89-c4b1-4968-8cfd-5b28435ed496" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_fff6e6cc-d8c7-422e-bfe8-1e3b845df89d" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_67b0ee89-c4b1-4968-8cfd-5b28435ed496" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_b58dae6c-9a03-4c83-bc4a-eaff3b0ef4de" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_fff6e6cc-d8c7-422e-bfe8-1e3b845df89d" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_b58dae6c-9a03-4c83-bc4a-eaff3b0ef4de" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_e60f62d5-c0a7-464d-9d8d-8777d2d684e6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_fff6e6cc-d8c7-422e-bfe8-1e3b845df89d" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_e60f62d5-c0a7-464d-9d8d-8777d2d684e6" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_43900bd3-de04-4f0a-9ff7-d7127d62f2cb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_8defbb03-33df-4cc3-9e7e-25d62fdc1a65" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_e1a2a8ae-3890-43b6-b20b-205fb22d5aed" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_8defbb03-33df-4cc3-9e7e-25d62fdc1a65" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_05d1b098-05ca-4b37-9ac8-88d0d827fbd0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_8defbb03-33df-4cc3-9e7e-25d62fdc1a65" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_05d1b098-05ca-4b37-9ac8-88d0d827fbd0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_05d1b098-05ca-4b37-9ac8-88d0d827fbd0_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_05d1b098-05ca-4b37-9ac8-88d0d827fbd0" xlink:to="loc_us-gaap_SegmentDomain_05d1b098-05ca-4b37-9ac8-88d0d827fbd0_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_867f1d9e-519c-4a63-858d-09d9e09e0184" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_05d1b098-05ca-4b37-9ac8-88d0d827fbd0" xlink:to="loc_us-gaap_SegmentDomain_867f1d9e-519c-4a63-858d-09d9e09e0184" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DrillingAndSubseaMember_bf31fa5e-26ba-430e-9581-dec8d0b9e0ba" xlink:href="fet-20190930.xsd#fet_DrillingAndSubseaMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_867f1d9e-519c-4a63-858d-09d9e09e0184" xlink:to="loc_fet_DrillingAndSubseaMember_bf31fa5e-26ba-430e-9581-dec8d0b9e0ba" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CompletionsMember_07d003b6-4548-4137-87ff-a5c0efc665ed" xlink:href="fet-20190930.xsd#fet_CompletionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_867f1d9e-519c-4a63-858d-09d9e09e0184" xlink:to="loc_fet_CompletionsMember_07d003b6-4548-4137-87ff-a5c0efc665ed" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ProductionAndInfrastructureMember_abd48928-8837-4ff6-b94a-ebac9c84c51e" xlink:href="fet-20190930.xsd#fet_ProductionAndInfrastructureMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_867f1d9e-519c-4a63-858d-09d9e09e0184" xlink:to="loc_fet_ProductionAndInfrastructureMember_abd48928-8837-4ff6-b94a-ebac9c84c51e" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/GoodwillandIntangibleAssetsNarrativeDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#GoodwillandIntangibleAssetsNarrativeDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/GoodwillandIntangibleAssetsNarrativeDetails" xlink:type="extended" id="i4b47b1d4acfd4f41b9d48f96d2be579b_c9611d5e-4a11-4af5-9171-bb5aaf5ac675">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_554b6128-a287-42dd-9183-e28edb90e123" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_58ab05a0-7083-4a51-b8bd-72fcacc2d728" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_554b6128-a287-42dd-9183-e28edb90e123" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_58ab05a0-7083-4a51-b8bd-72fcacc2d728" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_d1f1ca18-6c55-40c4-925b-1e9dd2e262fe" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_554b6128-a287-42dd-9183-e28edb90e123" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_d1f1ca18-6c55-40c4-925b-1e9dd2e262fe" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_cc6ea5b9-42fe-40e8-b61f-ce75b99aa770" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_554b6128-a287-42dd-9183-e28edb90e123" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_cc6ea5b9-42fe-40e8-b61f-ce75b99aa770" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_c1e02971-9a52-4164-b9ac-4102d659a36d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_554b6128-a287-42dd-9183-e28edb90e123" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_c1e02971-9a52-4164-b9ac-4102d659a36d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_4f4eab2c-28ef-4239-990a-fa357a9f0958" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_c1e02971-9a52-4164-b9ac-4102d659a36d" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_4f4eab2c-28ef-4239-990a-fa357a9f0958" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_4f4eab2c-28ef-4239-990a-fa357a9f0958_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_4f4eab2c-28ef-4239-990a-fa357a9f0958" xlink:to="loc_us-gaap_SegmentDomain_4f4eab2c-28ef-4239-990a-fa357a9f0958_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ba8f3471-85e5-40a0-b8ee-87ac9a9ad372" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_4f4eab2c-28ef-4239-990a-fa357a9f0958" xlink:to="loc_us-gaap_SegmentDomain_ba8f3471-85e5-40a0-b8ee-87ac9a9ad372" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DrillingAndSubseaMember_6001d054-ec90-4791-be06-904e4cd31668" xlink:href="fet-20190930.xsd#fet_DrillingAndSubseaMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba8f3471-85e5-40a0-b8ee-87ac9a9ad372" xlink:to="loc_fet_DrillingAndSubseaMember_6001d054-ec90-4791-be06-904e4cd31668" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_StimulationandInterventionMember_548624eb-cb92-4c9d-b87c-e7343c14cc76" xlink:href="fet-20190930.xsd#fet_StimulationandInterventionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba8f3471-85e5-40a0-b8ee-87ac9a9ad372" xlink:to="loc_fet_StimulationandInterventionMember_548624eb-cb92-4c9d-b87c-e7343c14cc76" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CoiledTubingMember_71a3165c-86c7-4763-bcca-e87a70aaf4bd" xlink:href="fet-20190930.xsd#fet_CoiledTubingMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba8f3471-85e5-40a0-b8ee-87ac9a9ad372" xlink:to="loc_fet_CoiledTubingMember_71a3165c-86c7-4763-bcca-e87a70aaf4bd" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ProductionAndInfrastructureMember_c179f98c-6ac0-4178-b495-e729c004d717" xlink:href="fet-20190930.xsd#fet_ProductionAndInfrastructureMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba8f3471-85e5-40a0-b8ee-87ac9a9ad372" xlink:to="loc_fet_ProductionAndInfrastructureMember_c179f98c-6ac0-4178-b495-e729c004d717" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ValveSolutionsMember_89ef7ff7-3c32-4592-bce6-93a98783926c" xlink:href="fet-20190930.xsd#fet_ValveSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ba8f3471-85e5-40a0-b8ee-87ac9a9ad372" xlink:to="loc_fet_ValveSolutionsMember_89ef7ff7-3c32-4592-bce6-93a98783926c" xlink:type="arc" order="4"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/GoodwillandIntangibleAssetsFiniteLivedandIndefiniteLivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#GoodwillandIntangibleAssetsFiniteLivedandIndefiniteLivedIntangibleAssetsDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/GoodwillandIntangibleAssetsFiniteLivedandIndefiniteLivedIntangibleAssetsDetails" xlink:type="extended" id="icccfcc205a2f4834a9776a50ccb6a301_bea73819-18dd-46e9-91a5-c1920078b0b1">
<link:loc xlink:type="locator" xlink:label="loc_fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_e8efcfbe-9037-40ea-8527-9b9aa480e140" xlink:href="fet-20190930.xsd#fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_b42e5179-e2f1-416d-9e8b-66c780844749" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_e8efcfbe-9037-40ea-8527-9b9aa480e140" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_b42e5179-e2f1-416d-9e8b-66c780844749" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_4a192efe-1856-4c53-99d1-101b19a63ade" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_e8efcfbe-9037-40ea-8527-9b9aa480e140" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_4a192efe-1856-4c53-99d1-101b19a63ade" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_776b5ba1-7a81-48c4-b729-f27d9a83d62b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_e8efcfbe-9037-40ea-8527-9b9aa480e140" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_776b5ba1-7a81-48c4-b729-f27d9a83d62b" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_ff126044-7128-42c8-9335-aa6a67ec5d2e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_e8efcfbe-9037-40ea-8527-9b9aa480e140" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_ff126044-7128-42c8-9335-aa6a67ec5d2e" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_dba18889-ca08-46fe-afbe-dcff83813dd0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_e8efcfbe-9037-40ea-8527-9b9aa480e140" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_dba18889-ca08-46fe-afbe-dcff83813dd0" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_fcb3c5a2-ac33-4a89-a50e-35907659c253" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_e8efcfbe-9037-40ea-8527-9b9aa480e140" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_fcb3c5a2-ac33-4a89-a50e-35907659c253" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_357a2909-d5e9-4b4d-b993-3437acd6597d" xlink:href="fet-20190930.xsd#fet_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_fet_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems_e8efcfbe-9037-40ea-8527-9b9aa480e140" xlink:to="loc_fet_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_357a2909-d5e9-4b4d-b993-3437acd6597d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_96a4c483-31ef-4ba0-9d87-c0db1c20cd0f" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fet_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_357a2909-d5e9-4b4d-b993-3437acd6597d" xlink:to="loc_srt_RangeAxis_96a4c483-31ef-4ba0-9d87-c0db1c20cd0f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_96a4c483-31ef-4ba0-9d87-c0db1c20cd0f_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_96a4c483-31ef-4ba0-9d87-c0db1c20cd0f" xlink:to="loc_srt_RangeMember_96a4c483-31ef-4ba0-9d87-c0db1c20cd0f_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_8303fbb3-7862-4c12-a6ee-2e15d2ab6d54" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_96a4c483-31ef-4ba0-9d87-c0db1c20cd0f" xlink:to="loc_srt_RangeMember_8303fbb3-7862-4c12-a6ee-2e15d2ab6d54" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a2b926c8-8e6b-4ad8-9f2a-e4e876cb52b1" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8303fbb3-7862-4c12-a6ee-2e15d2ab6d54" xlink:to="loc_srt_MinimumMember_a2b926c8-8e6b-4ad8-9f2a-e4e876cb52b1" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_ac15727f-b8b5-4c23-9edb-9d32d749d626" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8303fbb3-7862-4c12-a6ee-2e15d2ab6d54" xlink:to="loc_srt_MaximumMember_ac15727f-b8b5-4c23-9edb-9d32d749d626" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0e014143-6fb6-4281-a84b-d43016e7ca2d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fet_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable_357a2909-d5e9-4b4d-b993-3437acd6597d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0e014143-6fb6-4281-a84b-d43016e7ca2d" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0e014143-6fb6-4281-a84b-d43016e7ca2d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0e014143-6fb6-4281-a84b-d43016e7ca2d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_0e014143-6fb6-4281-a84b-d43016e7ca2d_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e722e639-9162-40e6-922e-345b9b049f33" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0e014143-6fb6-4281-a84b-d43016e7ca2d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e722e639-9162-40e6-922e-345b9b049f33" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_47e57118-21d4-4acc-8662-676f13bf2c28" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CustomerRelationshipsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e722e639-9162-40e6-922e-345b9b049f33" xlink:to="loc_us-gaap_CustomerRelationshipsMember_47e57118-21d4-4acc-8662-676f13bf2c28" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_PatentsAndTechnologyMember_a975c15a-1252-4249-aba6-fe2f51518e48" xlink:href="fet-20190930.xsd#fet_PatentsAndTechnologyMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e722e639-9162-40e6-922e-345b9b049f33" xlink:to="loc_fet_PatentsAndTechnologyMember_a975c15a-1252-4249-aba6-fe2f51518e48" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_58c4589a-9636-4e8a-a61f-681ecd83f585" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncompeteAgreementsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e722e639-9162-40e6-922e-345b9b049f33" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_58c4589a-9636-4e8a-a61f-681ecd83f585" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_58eaed9a-95b2-4d87-810e-071152b04578" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TradeNamesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e722e639-9162-40e6-922e-345b9b049f33" xlink:to="loc_us-gaap_TradeNamesMember_58eaed9a-95b2-4d87-810e-071152b04578" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionRightsMember_64ae5d2b-9866-4992-a074-894444690f22" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DistributionRightsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e722e639-9162-40e6-922e-345b9b049f33" xlink:to="loc_us-gaap_DistributionRightsMember_64ae5d2b-9866-4992-a074-894444690f22" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_360fee94-152e-45f3-a31d-d07d7b1b3a83" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TrademarksMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e722e639-9162-40e6-922e-345b9b049f33" xlink:to="loc_us-gaap_TrademarksMember_360fee94-152e-45f3-a31d-d07d7b1b3a83" xlink:type="arc" order="5"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/Debt" xlink:type="simple" xlink:href="fet-20190930.xsd#Debt"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/Debt" xlink:type="extended" id="i2b1d85832ff34380b59399d300928741_66504c93-1a22-461f-9fd8-ffa10cef6513"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/DebtTables" xlink:type="simple" xlink:href="fet-20190930.xsd#DebtTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/DebtTables" xlink:type="extended" id="ifa413e6a27c94d79817a2d43375ef7cc_4a5d2ff0-b260-4ddd-ae97-c88b433f9f81"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/DebtScheduleofLongTermDebtDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#DebtScheduleofLongTermDebtDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/DebtScheduleofLongTermDebtDetails" xlink:type="extended" id="ie366e460217b43b1848ccfa036d5e100_e7479e0c-18f5-4ea5-81b2-67dea195550b">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_9895a61e-cb7b-4d10-bcf6-c4595a6e2040" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndCapitalLeaseObligations_13768ae6-eff5-42c0-80c2-ad24cba855ab" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtAndCapitalLeaseObligations"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9895a61e-cb7b-4d10-bcf6-c4595a6e2040" xlink:to="loc_us-gaap_DebtAndCapitalLeaseObligations_13768ae6-eff5-42c0-80c2-ad24cba855ab" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedPremium_c14fbfd9-18ac-4105-8b1d-487e83995d9d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentUnamortizedPremium"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9895a61e-cb7b-4d10-bcf6-c4595a6e2040" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedPremium_c14fbfd9-18ac-4105-8b1d-487e83995d9d" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_5eede489-ebdc-47fc-9832-5319803584db" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9895a61e-cb7b-4d10-bcf6-c4595a6e2040" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_5eede489-ebdc-47fc-9832-5319803584db" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_8cde25e4-c1d1-4735-9c60-426cc9fbb91a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9895a61e-cb7b-4d10-bcf6-c4595a6e2040" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_8cde25e4-c1d1-4735-9c60-426cc9fbb91a" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_a0aa279b-2581-4c7d-8936-84b98418ea72" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9895a61e-cb7b-4d10-bcf6-c4595a6e2040" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_a0aa279b-2581-4c7d-8936-84b98418ea72" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_528935d4-0804-4fd8-a0c7-a51277f7bb7e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9895a61e-cb7b-4d10-bcf6-c4595a6e2040" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_528935d4-0804-4fd8-a0c7-a51277f7bb7e" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_a16c5c8e-a351-48a5-84cb-765598246779" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9895a61e-cb7b-4d10-bcf6-c4595a6e2040" xlink:to="loc_us-gaap_DebtInstrumentTable_a16c5c8e-a351-48a5-84cb-765598246779" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_7b788725-1580-4000-9bc6-581a3d7e272f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a16c5c8e-a351-48a5-84cb-765598246779" xlink:to="loc_us-gaap_DebtInstrumentAxis_7b788725-1580-4000-9bc6-581a3d7e272f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7b788725-1580-4000-9bc6-581a3d7e272f_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_7b788725-1580-4000-9bc6-581a3d7e272f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7b788725-1580-4000-9bc6-581a3d7e272f_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_69a37337-7f5b-4358-8e2b-08338319a0b3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_7b788725-1580-4000-9bc6-581a3d7e272f" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_69a37337-7f5b-4358-8e2b-08338319a0b3" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_A2017CreditFacilityMember_11df3fb2-bead-4b25-a9b4-2949e17f1e10" xlink:href="fet-20190930.xsd#fet_A2017CreditFacilityMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_69a37337-7f5b-4358-8e2b-08338319a0b3" xlink:to="loc_fet_A2017CreditFacilityMember_11df3fb2-bead-4b25-a9b4-2949e17f1e10" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_7f4f87a3-b10c-439f-ad11-14ffdf111f18" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a16c5c8e-a351-48a5-84cb-765598246779" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_7f4f87a3-b10c-439f-ad11-14ffdf111f18" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7f4f87a3-b10c-439f-ad11-14ffdf111f18_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_7f4f87a3-b10c-439f-ad11-14ffdf111f18" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7f4f87a3-b10c-439f-ad11-14ffdf111f18_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_71223f68-bf4c-4c0a-b9e3-3a9cb9126c7f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_7f4f87a3-b10c-439f-ad11-14ffdf111f18" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_71223f68-bf4c-4c0a-b9e3-3a9cb9126c7f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_37adb265-1efc-4362-919e-1d876d8ab253" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorNotesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_71223f68-bf4c-4c0a-b9e3-3a9cb9126c7f" xlink:to="loc_us-gaap_SeniorNotesMember_37adb265-1efc-4362-919e-1d876d8ab253" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_335aa138-99f1-4956-9011-bbdc1e106c83" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_71223f68-bf4c-4c0a-b9e3-3a9cb9126c7f" xlink:to="loc_us-gaap_LineOfCreditMember_335aa138-99f1-4956-9011-bbdc1e106c83" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_OtherDebtMember_49f5a4e6-6a86-43c2-b16a-1e4dd589cded" xlink:href="fet-20190930.xsd#fet_OtherDebtMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_71223f68-bf4c-4c0a-b9e3-3a9cb9126c7f" xlink:to="loc_fet_OtherDebtMember_49f5a4e6-6a86-43c2-b16a-1e4dd589cded" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#DebtNarrativeDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/DebtNarrativeDetails" xlink:type="extended" id="i597b27d356254c349741c45b33173ac2_83f47036-fdf7-4a17-9afd-350314e71499">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_61970db5-6307-41fc-82ef-0ad31c77c06f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_61970db5-6307-41fc-82ef-0ad31c77c06f" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_6853eb89-d855-4550-b388-26cbea5627fc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_6853eb89-d855-4550-b388-26cbea5627fc" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DebtInstrumentIssuancePriceofParPercentage_ee21fe4b-2054-49f2-a146-820398bcfca4" xlink:href="fet-20190930.xsd#fet_DebtInstrumentIssuancePriceofParPercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_fet_DebtInstrumentIssuancePriceofParPercentage_ee21fe4b-2054-49f2-a146-820398bcfca4" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_71f39cf2-8974-4544-bd52-b95bf4fc3c3e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_71f39cf2-8974-4544-bd52-b95bf4fc3c3e" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_d653f6e2-9bb6-4244-827a-fd12d0f384b1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_d653f6e2-9bb6-4244-827a-fd12d0f384b1" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_LineofCreditFacilityAccordionFeatureIncreaseLimit_5b659526-2333-4d16-a8bc-0383a1584e48" xlink:href="fet-20190930.xsd#fet_LineofCreditFacilityAccordionFeatureIncreaseLimit"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_fet_LineofCreditFacilityAccordionFeatureIncreaseLimit_5b659526-2333-4d16-a8bc-0383a1584e48" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndCapitalLeaseObligations_561006a7-a3e6-4a50-928a-c17fe811fa05" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtAndCapitalLeaseObligations"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_DebtAndCapitalLeaseObligations_561006a7-a3e6-4a50-928a-c17fe811fa05" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_3b768873-2328-4ce6-ae82-4b65ef2c0418" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCredit"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_LineOfCredit_3b768873-2328-4ce6-ae82-4b65ef2c0418" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_123407a4-c201-4c8b-a821-a23c9d5a7abd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_123407a4-c201-4c8b-a821-a23c9d5a7abd" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_ac7dd484-064c-4e2f-be66-c964b02f631a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_ac7dd484-064c-4e2f-be66-c964b02f631a" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DebtInstrumentMinimumLeverageRatio_824cbacb-0c45-41e3-9471-7706d0aa66e7" xlink:href="fet-20190930.xsd#fet_DebtInstrumentMinimumLeverageRatio"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_fet_DebtInstrumentMinimumLeverageRatio_824cbacb-0c45-41e3-9471-7706d0aa66e7" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DebtInstrumentMaximumLeverageRatio_9340246d-c723-451d-9e34-1d2d8e259029" xlink:href="fet-20190930.xsd#fet_DebtInstrumentMaximumLeverageRatio"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_fet_DebtInstrumentMaximumLeverageRatio_9340246d-c723-451d-9e34-1d2d8e259029" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_718322e8-13ae-4776-b3dd-7835db16fecd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_718322e8-13ae-4776-b3dd-7835db16fecd" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_bd086ca4-f809-4d2f-bbfa-08e293a1d995" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_bd086ca4-f809-4d2f-bbfa-08e293a1d995" xlink:type="arc" order="13"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_PercentageofBorrowingBase_f04c50bf-0734-4567-a6ed-e78943fa009a" xlink:href="fet-20190930.xsd#fet_PercentageofBorrowingBase"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_fet_PercentageofBorrowingBase_f04c50bf-0734-4567-a6ed-e78943fa009a" xlink:type="arc" order="14"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_260d2dbb-2f5b-405b-a63e-9a06ae5fcc9d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_260d2dbb-2f5b-405b-a63e-9a06ae5fcc9d" xlink:type="arc" order="15"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DebtInstrumentFixedChargeCoverageRatio_a057ed17-ac12-4fad-b67e-bf3aea62962a" xlink:href="fet-20190930.xsd#fet_DebtInstrumentFixedChargeCoverageRatio"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_fet_DebtInstrumentFixedChargeCoverageRatio_a057ed17-ac12-4fad-b67e-bf3aea62962a" xlink:type="arc" order="16"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DebtInstrumentFixedChargeCoverageRatioConsecutiveDaysThreshold_56972966-9768-471a-a6f7-6755c4000327" xlink:href="fet-20190930.xsd#fet_DebtInstrumentFixedChargeCoverageRatioConsecutiveDaysThreshold"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_fet_DebtInstrumentFixedChargeCoverageRatioConsecutiveDaysThreshold_56972966-9768-471a-a6f7-6755c4000327" xlink:type="arc" order="17"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_303343f0-2833-4e5a-90ac-f5c9f89403a6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_303343f0-2833-4e5a-90ac-f5c9f89403a6" xlink:type="arc" order="18"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5fa7582c-e4a3-4a24-b49d-c7c128963502" xlink:to="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_7de4a73a-5d1f-4109-b506-9d55d1e68892" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:to="loc_srt_RangeAxis_7de4a73a-5d1f-4109-b506-9d55d1e68892" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_7de4a73a-5d1f-4109-b506-9d55d1e68892_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_7de4a73a-5d1f-4109-b506-9d55d1e68892" xlink:to="loc_srt_RangeMember_7de4a73a-5d1f-4109-b506-9d55d1e68892_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_070cbfa0-ce2f-4227-b0f0-2c812eb9ee06" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_7de4a73a-5d1f-4109-b506-9d55d1e68892" xlink:to="loc_srt_RangeMember_070cbfa0-ce2f-4227-b0f0-2c812eb9ee06" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_c37842d4-755c-42ad-b287-33ed2bbde354" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_070cbfa0-ce2f-4227-b0f0-2c812eb9ee06" xlink:to="loc_srt_MinimumMember_c37842d4-755c-42ad-b287-33ed2bbde354" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_6a6c12d9-1efc-426a-b5f0-4d7e97c5fb97" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_070cbfa0-ce2f-4227-b0f0-2c812eb9ee06" xlink:to="loc_srt_MaximumMember_6a6c12d9-1efc-426a-b5f0-4d7e97c5fb97" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_24de7186-709c-4682-afde-12f22f92b1cb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_24de7186-709c-4682-afde-12f22f92b1cb" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_24de7186-709c-4682-afde-12f22f92b1cb_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_24de7186-709c-4682-afde-12f22f92b1cb" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_24de7186-709c-4682-afde-12f22f92b1cb_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_ccb69dcb-1c87-43a2-adee-e0b1ad06d89b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_24de7186-709c-4682-afde-12f22f92b1cb" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_ccb69dcb-1c87-43a2-adee-e0b1ad06d89b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_62514c14-d91f-40ed-85fa-b955de18cff1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_ccb69dcb-1c87-43a2-adee-e0b1ad06d89b" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_62514c14-d91f-40ed-85fa-b955de18cff1" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_5e70698c-9e84-47ab-983d-bf2cc2d9433f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_ccb69dcb-1c87-43a2-adee-e0b1ad06d89b" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_5e70698c-9e84-47ab-983d-bf2cc2d9433f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_39d588c0-4563-4c66-b46b-d232f6bd918c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_ccb69dcb-1c87-43a2-adee-e0b1ad06d89b" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_39d588c0-4563-4c66-b46b-d232f6bd918c" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodFourMember_783b5c6e-5d7b-4ad5-9a67-cf928bb7133d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodFourMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_ccb69dcb-1c87-43a2-adee-e0b1ad06d89b" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodFourMember_783b5c6e-5d7b-4ad5-9a67-cf928bb7133d" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_ea9d5360-93f3-40eb-9d6d-56a3aa9582bb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodFiveMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_ccb69dcb-1c87-43a2-adee-e0b1ad06d89b" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodFiveMember_ea9d5360-93f3-40eb-9d6d-56a3aa9582bb" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_0d9f5231-d322-4f1c-aefe-f8cd408938c9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:to="loc_us-gaap_VariableRateAxis_0d9f5231-d322-4f1c-aefe-f8cd408938c9" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_0d9f5231-d322-4f1c-aefe-f8cd408938c9_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_0d9f5231-d322-4f1c-aefe-f8cd408938c9" xlink:to="loc_us-gaap_VariableRateDomain_0d9f5231-d322-4f1c-aefe-f8cd408938c9_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_3bb3294f-a3f1-4c48-bf27-a38a5c53b6e2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VariableRateDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_0d9f5231-d322-4f1c-aefe-f8cd408938c9" xlink:to="loc_us-gaap_VariableRateDomain_3bb3294f-a3f1-4c48-bf27-a38a5c53b6e2" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_adb87a8b-e810-4e16-bcd1-aef47c9fc733" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FederalFundsEffectiveSwapRateMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_3bb3294f-a3f1-4c48-bf27-a38a5c53b6e2" xlink:to="loc_us-gaap_FederalFundsEffectiveSwapRateMember_adb87a8b-e810-4e16-bcd1-aef47c9fc733" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_762d7916-a786-467b-84f7-b5cb8b76859c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_3bb3294f-a3f1-4c48-bf27-a38a5c53b6e2" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_762d7916-a786-467b-84f7-b5cb8b76859c" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CDORRateMember_7f710f5f-0d90-44a8-992d-6f802c42fc63" xlink:href="fet-20190930.xsd#fet_CDORRateMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_3bb3294f-a3f1-4c48-bf27-a38a5c53b6e2" xlink:to="loc_fet_CDORRateMember_7f710f5f-0d90-44a8-992d-6f802c42fc63" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_d02fc32f-beb1-45e8-bf2f-d1087ca9653d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:to="loc_us-gaap_DebtInstrumentAxis_d02fc32f-beb1-45e8-bf2f-d1087ca9653d" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d02fc32f-beb1-45e8-bf2f-d1087ca9653d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_d02fc32f-beb1-45e8-bf2f-d1087ca9653d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d02fc32f-beb1-45e8-bf2f-d1087ca9653d_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_74924f5a-2c0e-4306-b964-d47522d1d7ec" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_d02fc32f-beb1-45e8-bf2f-d1087ca9653d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_74924f5a-2c0e-4306-b964-d47522d1d7ec" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_A2017CreditFacilityMember_a03a5803-6f2e-48b6-a310-72770e174cb3" xlink:href="fet-20190930.xsd#fet_A2017CreditFacilityMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_74924f5a-2c0e-4306-b964-d47522d1d7ec" xlink:to="loc_fet_A2017CreditFacilityMember_a03a5803-6f2e-48b6-a310-72770e174cb3" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_211c8390-42cc-4af7-8e59-059f40a81a69" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_211c8390-42cc-4af7-8e59-059f40a81a69" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_211c8390-42cc-4af7-8e59-059f40a81a69_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_211c8390-42cc-4af7-8e59-059f40a81a69" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_211c8390-42cc-4af7-8e59-059f40a81a69_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_cdd0fb35-ed73-4493-883c-d6b10d42b7b1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_211c8390-42cc-4af7-8e59-059f40a81a69" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_cdd0fb35-ed73-4493-883c-d6b10d42b7b1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_3145ccba-a5dd-4060-b4d9-85259f385c48" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorNotesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_cdd0fb35-ed73-4493-883c-d6b10d42b7b1" xlink:to="loc_us-gaap_SeniorNotesMember_3145ccba-a5dd-4060-b4d9-85259f385c48" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_a4b25e9f-6dae-4e01-9181-ef60fb164bf7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_cdd0fb35-ed73-4493-883c-d6b10d42b7b1" xlink:to="loc_us-gaap_LineOfCreditMember_a4b25e9f-6dae-4e01-9181-ef60fb164bf7" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_5f791188-16e9-400f-ab51-c536b77f708c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:to="loc_us-gaap_CreditFacilityAxis_5f791188-16e9-400f-ab51-c536b77f708c" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_5f791188-16e9-400f-ab51-c536b77f708c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_5f791188-16e9-400f-ab51-c536b77f708c" xlink:to="loc_us-gaap_CreditFacilityDomain_5f791188-16e9-400f-ab51-c536b77f708c_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_207a8908-6234-447c-8535-038a1b26ca4d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_5f791188-16e9-400f-ab51-c536b77f708c" xlink:to="loc_us-gaap_CreditFacilityDomain_207a8908-6234-447c-8535-038a1b26ca4d" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_70b603fd-606e-4bdd-a02a-81fcce4df7e5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_207a8908-6234-447c-8535-038a1b26ca4d" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_70b603fd-606e-4bdd-a02a-81fcce4df7e5" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignLineOfCreditMember_6400df2c-2a3e-4eab-9bcf-144532917c90" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignLineOfCreditMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_207a8908-6234-447c-8535-038a1b26ca4d" xlink:to="loc_us-gaap_ForeignLineOfCreditMember_6400df2c-2a3e-4eab-9bcf-144532917c90" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_bfd80c24-e47a-42db-b413-d7af5497a18e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LetterOfCreditMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_207a8908-6234-447c-8535-038a1b26ca4d" xlink:to="loc_us-gaap_LetterOfCreditMember_bfd80c24-e47a-42db-b413-d7af5497a18e" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_0a123e91-54ba-48ff-9b99-39d47af82903" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4cfc6393-7441-4467-a2cf-c52d912f4f26" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_0a123e91-54ba-48ff-9b99-39d47af82903" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_0a123e91-54ba-48ff-9b99-39d47af82903_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_0a123e91-54ba-48ff-9b99-39d47af82903" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_0a123e91-54ba-48ff-9b99-39d47af82903_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_06bf1ecd-df2b-4791-8eb5-74a6d05beeaa" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_0a123e91-54ba-48ff-9b99-39d47af82903" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_06bf1ecd-df2b-4791-8eb5-74a6d05beeaa" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CanadianSubsidiariesMember_9ef9a58e-fb54-4c2f-8e73-a571d43ae95a" xlink:href="fet-20190930.xsd#fet_CanadianSubsidiariesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_06bf1ecd-df2b-4791-8eb5-74a6d05beeaa" xlink:to="loc_fet_CanadianSubsidiariesMember_9ef9a58e-fb54-4c2f-8e73-a571d43ae95a" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/Leases" xlink:type="simple" xlink:href="fet-20190930.xsd#Leases"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/Leases" xlink:type="extended" id="i36bddb74cb304cc48ecde4255d548cf7_8b680f83-51ae-4639-91b1-373ecc5f1c14"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/LeasesTables" xlink:type="simple" xlink:href="fet-20190930.xsd#LeasesTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/LeasesTables" xlink:type="extended" id="id6428989de0049c781fe88fd966794df_e24c195d-2f4e-44cf-98a5-5ab7d8754d73"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#LeasesNarrativeDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/LeasesNarrativeDetails" xlink:type="extended" id="i7ed9e17020eb4bde820e83677e1e52d2_7f4ccabe-4595-4084-be82-836b8ca7f7fe">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_5fc2ae9f-ea7c-491b-a8ac-70d5d191c327" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_LesseeRemainingLeaseTerm_3a1acf13-26c6-4996-bcd0-64ebd1dbd913" xlink:href="fet-20190930.xsd#fet_LesseeRemainingLeaseTerm"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_5fc2ae9f-ea7c-491b-a8ac-70d5d191c327" xlink:to="loc_fet_LesseeRemainingLeaseTerm_3a1acf13-26c6-4996-bcd0-64ebd1dbd913" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_8d974200-d275-4e16-832b-ed0fa51a7e23" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_5fc2ae9f-ea7c-491b-a8ac-70d5d191c327" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_8d974200-d275-4e16-832b-ed0fa51a7e23" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_649a0d64-e6ef-4b9d-aa1d-08c2c99b700f" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_8d974200-d275-4e16-832b-ed0fa51a7e23" xlink:to="loc_srt_RangeAxis_649a0d64-e6ef-4b9d-aa1d-08c2c99b700f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_649a0d64-e6ef-4b9d-aa1d-08c2c99b700f_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_649a0d64-e6ef-4b9d-aa1d-08c2c99b700f" xlink:to="loc_srt_RangeMember_649a0d64-e6ef-4b9d-aa1d-08c2c99b700f_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ec249296-747e-44ab-adc5-5ab2c06cbce0" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_649a0d64-e6ef-4b9d-aa1d-08c2c99b700f" xlink:to="loc_srt_RangeMember_ec249296-747e-44ab-adc5-5ab2c06cbce0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_08830d7a-6f1a-4a08-a47c-706b27aefb2e" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ec249296-747e-44ab-adc5-5ab2c06cbce0" xlink:to="loc_srt_MinimumMember_08830d7a-6f1a-4a08-a47c-706b27aefb2e" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a3113fa7-1a14-4832-812a-e5724a653d93" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ec249296-747e-44ab-adc5-5ab2c06cbce0" xlink:to="loc_srt_MaximumMember_a3113fa7-1a14-4832-812a-e5724a653d93" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/LeasesScheduleofLeaseAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#LeasesScheduleofLeaseAssetsandLiabilitiesDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/LeasesScheduleofLeaseAssetsandLiabilitiesDetails" xlink:type="extended" id="i3edd6553b6f64b28bd5dd7bb84b8019e_a7bc3ed6-f0b6-4cf9-8d5f-513efc6d9cf8"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/LeasesScheduleofLeaseCostsDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#LeasesScheduleofLeaseCostsDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/LeasesScheduleofLeaseCostsDetails" xlink:type="extended" id="ia0b1b6cebabf4b7cbeff205984d83c11_0040e43d-2075-48eb-9eda-f4f9b843982e"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/LeasesScheduleofLeaseLiabilityMaturityDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#LeasesScheduleofLeaseLiabilityMaturityDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/LeasesScheduleofLeaseLiabilityMaturityDetails" xlink:type="extended" id="i3c042152a98349568ff26b4352cf86fd_62f67a82-7a80-4ec5-890a-17ef7037106a"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/LeasesScheduleofRemainingLeaseTermandDiscountRatesDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#LeasesScheduleofRemainingLeaseTermandDiscountRatesDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/LeasesScheduleofRemainingLeaseTermandDiscountRatesDetails" xlink:type="extended" id="i3a00a6bd24934e5a89a0c6c1fc0dca78_58889900-2855-477f-a256-2d2c4cd0e54b"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/LeasesScheduleofLeaseCashFlowsDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#LeasesScheduleofLeaseCashFlowsDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/LeasesScheduleofLeaseCashFlowsDetails" xlink:type="extended" id="i0666cee293504da5beb9edfea99288b6_3e42cdf1-f960-4fc9-8d6e-01579856840c"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/IncomeTaxes" xlink:type="simple" xlink:href="fet-20190930.xsd#IncomeTaxes"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/IncomeTaxes" xlink:type="extended" id="i62f436991b6c498799c27c4eb8e7fdbf_4cd5860b-c723-4110-98f6-44a180471da9"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/IncomeTaxesDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#IncomeTaxesDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/IncomeTaxesDetails" xlink:type="extended" id="i1eaa13d431a04af998023a471be3e6e2_8e7e4fc3-f176-4c2c-9d4b-ba757892bc2b"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="fet-20190930.xsd#FairValueMeasurements"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/FairValueMeasurements" xlink:type="extended" id="ie6d766494d814bf1a20445f3a300ccee_cafa38aa-2760-452e-93b0-b48b9460e633"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/FairValueMeasurementsDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#FairValueMeasurementsDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/FairValueMeasurementsDetails" xlink:type="extended" id="ic8afeb18389b4c42a2e8e6e7fe7567e9_b7856a2a-d339-496b-a1be-6fb8fe22c99c">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_b01253d0-77bc-4659-87c2-c4e272ded9cd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtAndCapitalLeaseObligations_584ebf6b-9d80-429d-9d2b-bcdab1735c3c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtAndCapitalLeaseObligations"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_b01253d0-77bc-4659-87c2-c4e272ded9cd" xlink:to="loc_us-gaap_DebtAndCapitalLeaseObligations_584ebf6b-9d80-429d-9d2b-bcdab1735c3c" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_dc3bc585-0380-4767-88fa-8c161729d1f1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFairValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_b01253d0-77bc-4659-87c2-c4e272ded9cd" xlink:to="loc_us-gaap_DebtInstrumentFairValue_dc3bc585-0380-4767-88fa-8c161729d1f1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_08bf3c32-6881-490f-826a-ed76580c601a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_b01253d0-77bc-4659-87c2-c4e272ded9cd" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_08bf3c32-6881-490f-826a-ed76580c601a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_2975b3e4-e563-41e1-9b8a-9ad77eb5d1f2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_08bf3c32-6881-490f-826a-ed76580c601a" xlink:to="loc_us-gaap_DebtInstrumentAxis_2975b3e4-e563-41e1-9b8a-9ad77eb5d1f2" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2975b3e4-e563-41e1-9b8a-9ad77eb5d1f2_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_2975b3e4-e563-41e1-9b8a-9ad77eb5d1f2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2975b3e4-e563-41e1-9b8a-9ad77eb5d1f2_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b17aa7ec-3553-4bf5-9dc8-5f15f699815b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_2975b3e4-e563-41e1-9b8a-9ad77eb5d1f2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b17aa7ec-3553-4bf5-9dc8-5f15f699815b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_A2017CreditFacilityMember_07faffde-e5a6-4119-98d6-7e44a3edf9c7" xlink:href="fet-20190930.xsd#fet_A2017CreditFacilityMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b17aa7ec-3553-4bf5-9dc8-5f15f699815b" xlink:to="loc_fet_A2017CreditFacilityMember_07faffde-e5a6-4119-98d6-7e44a3edf9c7" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_67a34256-39eb-4323-a9da-25e706e5e61c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_08bf3c32-6881-490f-826a-ed76580c601a" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_67a34256-39eb-4323-a9da-25e706e5e61c" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_67a34256-39eb-4323-a9da-25e706e5e61c_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_67a34256-39eb-4323-a9da-25e706e5e61c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_67a34256-39eb-4323-a9da-25e706e5e61c_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_43ddbb30-0a7e-45e6-a20e-b7b5b3498f94" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_67a34256-39eb-4323-a9da-25e706e5e61c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_43ddbb30-0a7e-45e6-a20e-b7b5b3498f94" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_148b3672-c33a-4b14-be9a-59930a85908d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_43ddbb30-0a7e-45e6-a20e-b7b5b3498f94" xlink:to="loc_us-gaap_LineOfCreditMember_148b3672-c33a-4b14-be9a-59930a85908d" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_8c769b9e-e67d-43c1-8055-710f32986ed0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeniorNotesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_43ddbb30-0a7e-45e6-a20e-b7b5b3498f94" xlink:to="loc_us-gaap_SeniorNotesMember_8c769b9e-e67d-43c1-8055-710f32986ed0" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_fed5c1a4-f4a0-4c27-9fa9-395dd54d72af" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_08bf3c32-6881-490f-826a-ed76580c601a" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_fed5c1a4-f4a0-4c27-9fa9-395dd54d72af" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_fed5c1a4-f4a0-4c27-9fa9-395dd54d72af_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_fed5c1a4-f4a0-4c27-9fa9-395dd54d72af" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_fed5c1a4-f4a0-4c27-9fa9-395dd54d72af_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_368636ed-0d79-4475-8eae-7c08b1f5204c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_fed5c1a4-f4a0-4c27-9fa9-395dd54d72af" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_368636ed-0d79-4475-8eae-7c08b1f5204c" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_756ed0b1-a2b6-402f-b9d3-8d4972d5fe8c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_368636ed-0d79-4475-8eae-7c08b1f5204c" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_756ed0b1-a2b6-402f-b9d3-8d4972d5fe8c" xlink:type="arc" order="0"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/BusinessSegments" xlink:type="simple" xlink:href="fet-20190930.xsd#BusinessSegments"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/BusinessSegments" xlink:type="extended" id="i2c759a84d0414214b98cc037d3bfc41a_91d11d69-f16d-4920-953d-4ec7feb22598"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/BusinessSegmentsTables" xlink:type="simple" xlink:href="fet-20190930.xsd#BusinessSegmentsTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/BusinessSegmentsTables" xlink:type="extended" id="i9c57be2342d14ac8a5d702ea38154d94_549c8d77-cdd7-4121-a956-243cbc92f99c"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/BusinessSegmentsIncomeStatementbySegmentDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#BusinessSegmentsIncomeStatementbySegmentDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/BusinessSegmentsIncomeStatementbySegmentDetails" xlink:type="extended" id="i3918c59ada4b4e1ba4b895a40069b578_7df28afb-ff4b-4ba8-a89b-9a6a0a33da2f">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_7431aeb3-a88f-4a59-9d99-aaac7b008b42" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e8ee5e6a-ba43-4e28-9d13-aa75c51395c1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7431aeb3-a88f-4a59-9d99-aaac7b008b42" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e8ee5e6a-ba43-4e28-9d13-aa75c51395c1" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_9084c2d8-2188-4ad3-8df7-aa8ca9f95206" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7431aeb3-a88f-4a59-9d99-aaac7b008b42" xlink:to="loc_us-gaap_OperatingIncomeLoss_9084c2d8-2188-4ad3-8df7-aa8ca9f95206" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_11e07be0-aae9-4eb5-a5f4-9144e0a71a3f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7431aeb3-a88f-4a59-9d99-aaac7b008b42" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_11e07be0-aae9-4eb5-a5f4-9144e0a71a3f" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_5f028eb3-75fc-4c56-a6fa-120830994282" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7431aeb3-a88f-4a59-9d99-aaac7b008b42" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_5f028eb3-75fc-4c56-a6fa-120830994282" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_902da4f4-a3bd-4e80-affa-1ccbd0a79d3d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7431aeb3-a88f-4a59-9d99-aaac7b008b42" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_902da4f4-a3bd-4e80-affa-1ccbd0a79d3d" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfAssets_8c56fa09-1cf1-468d-93b2-aeb3965ed485" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainsLossesOnSalesOfAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7431aeb3-a88f-4a59-9d99-aaac7b008b42" xlink:to="loc_us-gaap_GainsLossesOnSalesOfAssets_8c56fa09-1cf1-468d-93b2-aeb3965ed485" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_a5b1051c-3ca1-450b-8e78-8317285fad51" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7431aeb3-a88f-4a59-9d99-aaac7b008b42" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_a5b1051c-3ca1-450b-8e78-8317285fad51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_2860fdfa-f743-430a-a5ee-92260ff60dc4" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_a5b1051c-3ca1-450b-8e78-8317285fad51" xlink:to="loc_srt_ConsolidationItemsAxis_2860fdfa-f743-430a-a5ee-92260ff60dc4" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_2860fdfa-f743-430a-a5ee-92260ff60dc4_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_2860fdfa-f743-430a-a5ee-92260ff60dc4" xlink:to="loc_srt_ConsolidationItemsDomain_2860fdfa-f743-430a-a5ee-92260ff60dc4_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_28076cc9-6139-48ae-af2e-05271d030b6e" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_2860fdfa-f743-430a-a5ee-92260ff60dc4" xlink:to="loc_srt_ConsolidationItemsDomain_28076cc9-6139-48ae-af2e-05271d030b6e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_876915b3-0f6e-49e2-a731-d90a602f8cf9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_28076cc9-6139-48ae-af2e-05271d030b6e" xlink:to="loc_us-gaap_OperatingSegmentsMember_876915b3-0f6e-49e2-a731-d90a602f8cf9" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_26e6ef07-336d-41e0-887f-59a3b7b8dafb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntersegmentEliminationMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_28076cc9-6139-48ae-af2e-05271d030b6e" xlink:to="loc_us-gaap_IntersegmentEliminationMember_26e6ef07-336d-41e0-887f-59a3b7b8dafb" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_acd4ed58-bc95-45e6-accc-7b5412b2ba01" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateNonSegmentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_28076cc9-6139-48ae-af2e-05271d030b6e" xlink:to="loc_us-gaap_CorporateNonSegmentMember_acd4ed58-bc95-45e6-accc-7b5412b2ba01" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_23bea34a-c59d-4719-a549-53ad0fef26d3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MaterialReconcilingItemsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_28076cc9-6139-48ae-af2e-05271d030b6e" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_23bea34a-c59d-4719-a549-53ad0fef26d3" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9d2a30e6-717a-4224-a1e3-41c7a228f07e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_a5b1051c-3ca1-450b-8e78-8317285fad51" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9d2a30e6-717a-4224-a1e3-41c7a228f07e" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9d2a30e6-717a-4224-a1e3-41c7a228f07e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9d2a30e6-717a-4224-a1e3-41c7a228f07e" xlink:to="loc_us-gaap_SegmentDomain_9d2a30e6-717a-4224-a1e3-41c7a228f07e_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ae2a7099-2da5-448b-986c-cbb5bead18e5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9d2a30e6-717a-4224-a1e3-41c7a228f07e" xlink:to="loc_us-gaap_SegmentDomain_ae2a7099-2da5-448b-986c-cbb5bead18e5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DrillingAndDownholeMember_305debfd-eec7-4ac5-b46e-cd866456920d" xlink:href="fet-20190930.xsd#fet_DrillingAndDownholeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ae2a7099-2da5-448b-986c-cbb5bead18e5" xlink:to="loc_fet_DrillingAndDownholeMember_305debfd-eec7-4ac5-b46e-cd866456920d" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CompletionsMember_8e6c1e07-de92-4c4c-8698-54ce4220a0a1" xlink:href="fet-20190930.xsd#fet_CompletionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ae2a7099-2da5-448b-986c-cbb5bead18e5" xlink:to="loc_fet_CompletionsMember_8e6c1e07-de92-4c4c-8698-54ce4220a0a1" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ProductionMember_cd62a49a-17c6-429b-bc7c-e848272be26a" xlink:href="fet-20190930.xsd#fet_ProductionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ae2a7099-2da5-448b-986c-cbb5bead18e5" xlink:to="loc_fet_ProductionMember_cd62a49a-17c6-429b-bc7c-e848272be26a" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/BusinessSegmentsAssetsbySegmentDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#BusinessSegmentsAssetsbySegmentDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/BusinessSegmentsAssetsbySegmentDetails" xlink:type="extended" id="ib7745ddce9af49c59fb4576dc7141f02_861729d3-25ee-405a-ba81-8af18cf8bf0f">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_657ab42e-5a57-46aa-9773-695bba068bb9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_8642becf-529f-4f7c-a2ce-f705977d8c20" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_657ab42e-5a57-46aa-9773-695bba068bb9" xlink:to="loc_us-gaap_Assets_8642becf-529f-4f7c-a2ce-f705977d8c20" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3100ff08-2c92-40c7-86a4-0e16c5bb6d3e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_657ab42e-5a57-46aa-9773-695bba068bb9" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3100ff08-2c92-40c7-86a4-0e16c5bb6d3e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_24ea4e4d-9d29-4c8d-841b-e2618114913c" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3100ff08-2c92-40c7-86a4-0e16c5bb6d3e" xlink:to="loc_srt_ConsolidationItemsAxis_24ea4e4d-9d29-4c8d-841b-e2618114913c" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_24ea4e4d-9d29-4c8d-841b-e2618114913c_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_24ea4e4d-9d29-4c8d-841b-e2618114913c" xlink:to="loc_srt_ConsolidationItemsDomain_24ea4e4d-9d29-4c8d-841b-e2618114913c_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_485469d5-5986-4cfa-9e90-dd205fdc49f6" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_24ea4e4d-9d29-4c8d-841b-e2618114913c" xlink:to="loc_srt_ConsolidationItemsDomain_485469d5-5986-4cfa-9e90-dd205fdc49f6" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_f7c65352-15d6-435a-aa50-2ec8f2cba638" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_485469d5-5986-4cfa-9e90-dd205fdc49f6" xlink:to="loc_us-gaap_OperatingSegmentsMember_f7c65352-15d6-435a-aa50-2ec8f2cba638" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_65b8fb12-2a09-4ca1-8a75-32a78a1ffc48" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateNonSegmentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_485469d5-5986-4cfa-9e90-dd205fdc49f6" xlink:to="loc_us-gaap_CorporateNonSegmentMember_65b8fb12-2a09-4ca1-8a75-32a78a1ffc48" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_b8fdbd97-4757-436e-b8e0-4dc602e23f1d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3100ff08-2c92-40c7-86a4-0e16c5bb6d3e" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_b8fdbd97-4757-436e-b8e0-4dc602e23f1d" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_b8fdbd97-4757-436e-b8e0-4dc602e23f1d_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_b8fdbd97-4757-436e-b8e0-4dc602e23f1d" xlink:to="loc_us-gaap_SegmentDomain_b8fdbd97-4757-436e-b8e0-4dc602e23f1d_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a5f04be8-a35f-4ef3-8751-f543e7e4633b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_b8fdbd97-4757-436e-b8e0-4dc602e23f1d" xlink:to="loc_us-gaap_SegmentDomain_a5f04be8-a35f-4ef3-8751-f543e7e4633b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DrillingAndDownholeMember_d972fbfe-8dd9-4529-82f2-5ef1ef345808" xlink:href="fet-20190930.xsd#fet_DrillingAndDownholeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a5f04be8-a35f-4ef3-8751-f543e7e4633b" xlink:to="loc_fet_DrillingAndDownholeMember_d972fbfe-8dd9-4529-82f2-5ef1ef345808" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CompletionsMember_abf38be9-1230-437a-a86f-83130d0a0329" xlink:href="fet-20190930.xsd#fet_CompletionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a5f04be8-a35f-4ef3-8751-f543e7e4633b" xlink:to="loc_fet_CompletionsMember_abf38be9-1230-437a-a86f-83130d0a0329" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ProductionMember_98fd3c17-c7e7-49e8-a303-52f7d6aeb8ba" xlink:href="fet-20190930.xsd#fet_ProductionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a5f04be8-a35f-4ef3-8751-f543e7e4633b" xlink:to="loc_fet_ProductionMember_98fd3c17-c7e7-49e8-a303-52f7d6aeb8ba" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/BusinessSegmentsScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#BusinessSegmentsScheduleofDisaggregationofRevenueDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/BusinessSegmentsScheduleofDisaggregationofRevenueDetails" xlink:type="extended" id="ib8d7a56fd0f54cb8844f11f204c5ab50_9ef04d31-0149-466b-b9ae-9fcb0f65c221">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_3645ba63-aec8-44a2-85a0-119eb023b457" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_cc80d44a-1470-4bfb-9db7-9aa667b918c4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3645ba63-aec8-44a2-85a0-119eb023b457" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_cc80d44a-1470-4bfb-9db7-9aa667b918c4" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_d74b2de4-71cd-44f1-919a-9fd7f83331db" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3645ba63-aec8-44a2-85a0-119eb023b457" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_d74b2de4-71cd-44f1-919a-9fd7f83331db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_f30054d0-11e8-4357-84a8-5974f57c5443" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_d74b2de4-71cd-44f1-919a-9fd7f83331db" xlink:to="loc_srt_ProductOrServiceAxis_f30054d0-11e8-4357-84a8-5974f57c5443" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_f30054d0-11e8-4357-84a8-5974f57c5443_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_f30054d0-11e8-4357-84a8-5974f57c5443" xlink:to="loc_srt_ProductsAndServicesDomain_f30054d0-11e8-4357-84a8-5974f57c5443_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_f30054d0-11e8-4357-84a8-5974f57c5443" xlink:to="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DrillingTechnologiesMember_7fa224bc-f717-4cd4-b6f5-b98e1c215154" xlink:href="fet-20190930.xsd#fet_DrillingTechnologiesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:to="loc_fet_DrillingTechnologiesMember_7fa224bc-f717-4cd4-b6f5-b98e1c215154" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DownholeTechnologiesMember_6711772c-f08d-4ac2-aeab-e6b89741f239" xlink:href="fet-20190930.xsd#fet_DownholeTechnologiesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:to="loc_fet_DownholeTechnologiesMember_6711772c-f08d-4ac2-aeab-e6b89741f239" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_SubseaTechnologiesMember_131ddd71-e0d7-4de4-b2e7-d754d21b19ff" xlink:href="fet-20190930.xsd#fet_SubseaTechnologiesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:to="loc_fet_SubseaTechnologiesMember_131ddd71-e0d7-4de4-b2e7-d754d21b19ff" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_StimulationandInterventionMember_9f8cea18-15e7-4b92-8a9f-d6e995a43da6" xlink:href="fet-20190930.xsd#fet_StimulationandInterventionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:to="loc_fet_StimulationandInterventionMember_9f8cea18-15e7-4b92-8a9f-d6e995a43da6" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CoiledTubingMember_531efdc9-78b6-4a37-88e2-a4ecb98d6c81" xlink:href="fet-20190930.xsd#fet_CoiledTubingMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:to="loc_fet_CoiledTubingMember_531efdc9-78b6-4a37-88e2-a4ecb98d6c81" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ProductionEquipmentMember_e0ad0006-628e-40f7-87b3-e372c7f77758" xlink:href="fet-20190930.xsd#fet_ProductionEquipmentMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:to="loc_fet_ProductionEquipmentMember_e0ad0006-628e-40f7-87b3-e372c7f77758" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ValveSolutionsMember_7afe9300-f33c-483a-889a-4d6233c7a8f5" xlink:href="fet-20190930.xsd#fet_ValveSolutionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d1fed9b3-4521-4af4-a0c6-e1198b2333d9" xlink:to="loc_fet_ValveSolutionsMember_7afe9300-f33c-483a-889a-4d6233c7a8f5" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_5e1e1090-dfda-48ee-a7cb-70f047b2a82b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_d74b2de4-71cd-44f1-919a-9fd7f83331db" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_5e1e1090-dfda-48ee-a7cb-70f047b2a82b" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_5e1e1090-dfda-48ee-a7cb-70f047b2a82b_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5e1e1090-dfda-48ee-a7cb-70f047b2a82b" xlink:to="loc_us-gaap_SegmentDomain_5e1e1090-dfda-48ee-a7cb-70f047b2a82b_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3a6a1dbd-fb76-4d21-beaa-fd32a20ae63f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5e1e1090-dfda-48ee-a7cb-70f047b2a82b" xlink:to="loc_us-gaap_SegmentDomain_3a6a1dbd-fb76-4d21-beaa-fd32a20ae63f" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_DrillingAndDownholeMember_2451c171-585a-4911-95da-c4bbceaf6764" xlink:href="fet-20190930.xsd#fet_DrillingAndDownholeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3a6a1dbd-fb76-4d21-beaa-fd32a20ae63f" xlink:to="loc_fet_DrillingAndDownholeMember_2451c171-585a-4911-95da-c4bbceaf6764" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CompletionsMember_19f1e601-444e-49b5-b664-d6e2fcd69265" xlink:href="fet-20190930.xsd#fet_CompletionsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3a6a1dbd-fb76-4d21-beaa-fd32a20ae63f" xlink:to="loc_fet_CompletionsMember_19f1e601-444e-49b5-b664-d6e2fcd69265" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ProductionMember_fa2d1e73-f082-459e-8e0f-df23da3370f9" xlink:href="fet-20190930.xsd#fet_ProductionMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3a6a1dbd-fb76-4d21-beaa-fd32a20ae63f" xlink:to="loc_fet_ProductionMember_fa2d1e73-f082-459e-8e0f-df23da3370f9" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_b2acd189-05fd-45ac-82f3-982c61e76792" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_d74b2de4-71cd-44f1-919a-9fd7f83331db" xlink:to="loc_srt_ConsolidationItemsAxis_b2acd189-05fd-45ac-82f3-982c61e76792" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_b2acd189-05fd-45ac-82f3-982c61e76792_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_b2acd189-05fd-45ac-82f3-982c61e76792" xlink:to="loc_srt_ConsolidationItemsDomain_b2acd189-05fd-45ac-82f3-982c61e76792_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_7e55a047-6fb2-4924-aed0-770600e3b927" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_b2acd189-05fd-45ac-82f3-982c61e76792" xlink:to="loc_srt_ConsolidationItemsDomain_7e55a047-6fb2-4924-aed0-770600e3b927" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_0a788163-6cbc-4e59-983f-3899a9d2d969" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_7e55a047-6fb2-4924-aed0-770600e3b927" xlink:to="loc_us-gaap_OperatingSegmentsMember_0a788163-6cbc-4e59-983f-3899a9d2d969" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_4343c18d-f436-4e65-8e81-07257518adae" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntersegmentEliminationMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_7e55a047-6fb2-4924-aed0-770600e3b927" xlink:to="loc_us-gaap_IntersegmentEliminationMember_4343c18d-f436-4e65-8e81-07257518adae" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/BusinessSegmentsScheduleofRevenuebyGeographyDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#BusinessSegmentsScheduleofRevenuebyGeographyDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/BusinessSegmentsScheduleofRevenuebyGeographyDetails" xlink:type="extended" id="i8a2851d49b714a2e8f857304deac00fe_a90b6c76-5237-4587-a622-315b6a81c334">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_ded139f6-6d9a-4cad-8d33-e51582feb387" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_7f00b9c3-6ca9-471d-b69f-6dc17fd71fb7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_ded139f6-6d9a-4cad-8d33-e51582feb387" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_7f00b9c3-6ca9-471d-b69f-6dc17fd71fb7" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b3b41ca9-3f74-4a08-887f-93f29b44b45b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_ded139f6-6d9a-4cad-8d33-e51582feb387" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b3b41ca9-3f74-4a08-887f-93f29b44b45b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_7a5bc1b3-3092-4f76-b901-9a0b7a2fa111" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b3b41ca9-3f74-4a08-887f-93f29b44b45b" xlink:to="loc_srt_StatementGeographicalAxis_7a5bc1b3-3092-4f76-b901-9a0b7a2fa111" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_7a5bc1b3-3092-4f76-b901-9a0b7a2fa111_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_7a5bc1b3-3092-4f76-b901-9a0b7a2fa111" xlink:to="loc_srt_SegmentGeographicalDomain_7a5bc1b3-3092-4f76-b901-9a0b7a2fa111_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_19b130a2-2bf0-4007-b585-62171317f31c" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_7a5bc1b3-3092-4f76-b901-9a0b7a2fa111" xlink:to="loc_srt_SegmentGeographicalDomain_19b130a2-2bf0-4007-b585-62171317f31c" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_country_US_9f95e973-279a-4f2c-b55f-aa9d08070be8" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_19b130a2-2bf0-4007-b585-62171317f31c" xlink:to="loc_country_US_9f95e973-279a-4f2c-b55f-aa9d08070be8" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_country_CA_5d775f31-e54b-4037-83d8-1961fa6cc11e" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_CA"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_19b130a2-2bf0-4007-b585-62171317f31c" xlink:to="loc_country_CA_5d775f31-e54b-4037-83d8-1961fa6cc11e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_EuropeAndAfricaMember_55eb2c06-8bce-47a4-9326-345a2116e7ed" xlink:href="fet-20190930.xsd#fet_EuropeAndAfricaMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_19b130a2-2bf0-4007-b585-62171317f31c" xlink:to="loc_fet_EuropeAndAfricaMember_55eb2c06-8bce-47a4-9326-345a2116e7ed" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_MiddleEastMember_f75afd4f-f39a-4e43-9d1c-94a42f5be630" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MiddleEastMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_19b130a2-2bf0-4007-b585-62171317f31c" xlink:to="loc_us-gaap_MiddleEastMember_f75afd4f-f39a-4e43-9d1c-94a42f5be630" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_AsiaPacificMember_0878a40d-b69b-4508-9aae-b13b0d05c767" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_AsiaPacificMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_19b130a2-2bf0-4007-b585-62171317f31c" xlink:to="loc_srt_AsiaPacificMember_0878a40d-b69b-4508-9aae-b13b0d05c767" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_LatinAmericaMember_64f76357-c168-4608-a2d1-ca4d2a7e34ff" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_LatinAmericaMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_19b130a2-2bf0-4007-b585-62171317f31c" xlink:to="loc_srt_LatinAmericaMember_64f76357-c168-4608-a2d1-ca4d2a7e34ff" xlink:type="arc" order="5"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/CommitmentsandContingencies" xlink:type="simple" xlink:href="fet-20190930.xsd#CommitmentsandContingencies"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CommitmentsandContingencies" xlink:type="extended" id="ib7647e531a034f9cb772398e151d819a_2173a0f0-9630-468e-a03e-a5f7e2060e67"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/EarningsPerShare" xlink:type="simple" xlink:href="fet-20190930.xsd#EarningsPerShare"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/EarningsPerShare" xlink:type="extended" id="ia2d18106a893454ebd8a0f87563c84ad_e9be83c6-db6b-4e4a-8729-00a7b28a1adc"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/EarningsPerShareTables" xlink:type="simple" xlink:href="fet-20190930.xsd#EarningsPerShareTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/EarningsPerShareTables" xlink:type="extended" id="i365af5b02e3948a69ecc662623d72594_2c8ec11e-da31-4d7f-836e-4159398d472b"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/EarningsPerShareDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#EarningsPerShareDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/EarningsPerShareDetails" xlink:type="extended" id="i3a8bc42e3cdf4cf3b317f516cb09e5f7_fe64a163-bf89-44a0-b32d-4101499a4b11"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/StockholdersEquity" xlink:type="simple" xlink:href="fet-20190930.xsd#StockholdersEquity"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/StockholdersEquity" xlink:type="extended" id="ibac5a81a0f45416f9d70011a33c592be_9f4ce2d1-7d5c-480a-897f-e6ba38f083d9"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/StockholdersEquityDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#StockholdersEquityDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/StockholdersEquityDetails" xlink:type="extended" id="i8aba6436ded8450fa2bef0a9434163f8_a7e13d77-9251-4baa-ab37-06924d7d1fdb">
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71453f86-94a1-4b2f-bef5-56b61cb4294f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_80bf4082-46f8-4e49-84d4-305327c1a9d7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71453f86-94a1-4b2f-bef5-56b61cb4294f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_80bf4082-46f8-4e49-84d4-305327c1a9d7" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_8c142b91-8c3a-4cd5-adc2-b8eafe11d761" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71453f86-94a1-4b2f-bef5-56b61cb4294f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_8c142b91-8c3a-4cd5-adc2-b8eafe11d761" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsConversionRatio_0a8184d3-7d2f-4c6f-bbd6-a1c46ee3abed" xlink:href="fet-20190930.xsd#fet_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsConversionRatio"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71453f86-94a1-4b2f-bef5-56b61cb4294f" xlink:to="loc_fet_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsConversionRatio_0a8184d3-7d2f-4c6f-bbd6-a1c46ee3abed" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceMeasurementPeriod_712a4eb7-9be3-428a-8bea-e1876e472158" xlink:href="fet-20190930.xsd#fet_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceMeasurementPeriod"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71453f86-94a1-4b2f-bef5-56b61cb4294f" xlink:to="loc_fet_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceMeasurementPeriod_712a4eb7-9be3-428a-8bea-e1876e472158" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0d73a858-91f7-4ae8-9978-3ba1781e6561" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_71453f86-94a1-4b2f-bef5-56b61cb4294f" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0d73a858-91f7-4ae8-9978-3ba1781e6561" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateAxis_313d8e7a-3b50-4e3a-9e78-f85ec7b3a39e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardDateAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0d73a858-91f7-4ae8-9978-3ba1781e6561" xlink:to="loc_us-gaap_AwardDateAxis_313d8e7a-3b50-4e3a-9e78-f85ec7b3a39e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_313d8e7a-3b50-4e3a-9e78-f85ec7b3a39e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardDateDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardDateAxis_313d8e7a-3b50-4e3a-9e78-f85ec7b3a39e" xlink:to="loc_us-gaap_AwardDateDomain_313d8e7a-3b50-4e3a-9e78-f85ec7b3a39e_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardDateDomain_593e0cd9-9a46-4603-bd96-5706c0443b81" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardDateDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardDateAxis_313d8e7a-3b50-4e3a-9e78-f85ec7b3a39e" xlink:to="loc_us-gaap_AwardDateDomain_593e0cd9-9a46-4603-bd96-5706c0443b81" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_February2019Member_7252c902-7936-40a3-b902-b3778c89e454" xlink:href="fet-20190930.xsd#fet_February2019Member"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AwardDateDomain_593e0cd9-9a46-4603-bd96-5706c0443b81" xlink:to="loc_fet_February2019Member_7252c902-7936-40a3-b902-b3778c89e454" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_e7b4a228-7533-450a-a44a-b31f12588d0e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0d73a858-91f7-4ae8-9978-3ba1781e6561" xlink:to="loc_us-gaap_AwardTypeAxis_e7b4a228-7533-450a-a44a-b31f12588d0e" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e7b4a228-7533-450a-a44a-b31f12588d0e_default" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_e7b4a228-7533-450a-a44a-b31f12588d0e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e7b4a228-7533-450a-a44a-b31f12588d0e_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_613ee924-f67a-4c3c-abf7-e3c349b480a8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_e7b4a228-7533-450a-a44a-b31f12588d0e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_613ee924-f67a-4c3c-abf7-e3c349b480a8" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_RestrictedStockAndRestrictedStockUnitsMember_28cfd57b-b4c6-45f7-ac04-4767030400f7" xlink:href="fet-20190930.xsd#fet_RestrictedStockAndRestrictedStockUnitsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_613ee924-f67a-4c3c-abf7-e3c349b480a8" xlink:to="loc_fet_RestrictedStockAndRestrictedStockUnitsMember_28cfd57b-b4c6-45f7-ac04-4767030400f7" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_f59e654a-93d6-4446-9431-b3f187c19b5e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_613ee924-f67a-4c3c-abf7-e3c349b480a8" xlink:to="loc_us-gaap_PerformanceSharesMember_f59e654a-93d6-4446-9431-b3f187c19b5e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_f787b690-07b5-4c76-a6bd-6247fef2f067" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0d73a858-91f7-4ae8-9978-3ba1781e6561" xlink:to="loc_srt_TitleOfIndividualAxis_f787b690-07b5-4c76-a6bd-6247fef2f067" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_f787b690-07b5-4c76-a6bd-6247fef2f067_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_f787b690-07b5-4c76-a6bd-6247fef2f067" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_f787b690-07b5-4c76-a6bd-6247fef2f067_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5a45046-1ca6-4419-bc77-35ed73fa8893" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_f787b690-07b5-4c76-a6bd-6247fef2f067" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5a45046-1ca6-4419-bc77-35ed73fa8893" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_EmployeeMember_b31eb200-28d1-4ec6-9195-d1112722d9e9" xlink:href="fet-20190930.xsd#fet_EmployeeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5a45046-1ca6-4419-bc77-35ed73fa8893" xlink:to="loc_fet_EmployeeMember_b31eb200-28d1-4ec6-9195-d1112722d9e9" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_DirectorMember_0b46863e-f383-4606-93a5-22fc568899af" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_DirectorMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5a45046-1ca6-4419-bc77-35ed73fa8893" xlink:to="loc_srt_DirectorMember_0b46863e-f383-4606-93a5-22fc568899af" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2ef8bc1e-87d1-4543-a5d2-b44e0b5a9344" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0d73a858-91f7-4ae8-9978-3ba1781e6561" xlink:to="loc_srt_RangeAxis_2ef8bc1e-87d1-4543-a5d2-b44e0b5a9344" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2ef8bc1e-87d1-4543-a5d2-b44e0b5a9344_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2ef8bc1e-87d1-4543-a5d2-b44e0b5a9344" xlink:to="loc_srt_RangeMember_2ef8bc1e-87d1-4543-a5d2-b44e0b5a9344_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1e832c6d-ff37-4289-a65d-027cf7a5b9d2" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_RangeMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2ef8bc1e-87d1-4543-a5d2-b44e0b5a9344" xlink:to="loc_srt_RangeMember_1e832c6d-ff37-4289-a65d-027cf7a5b9d2" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_c3cea6d7-291e-49db-a623-896334ef0bd0" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1e832c6d-ff37-4289-a65d-027cf7a5b9d2" xlink:to="loc_srt_MinimumMember_c3cea6d7-291e-49db-a623-896334ef0bd0" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_1ebad65d-3751-40c7-a599-d1e68354f36b" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1e832c6d-ff37-4289-a65d-027cf7a5b9d2" xlink:to="loc_srt_MaximumMember_1ebad65d-3751-40c7-a599-d1e68354f36b" xlink:type="arc" order="1"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/RelatedPartyTransactions" xlink:type="simple" xlink:href="fet-20190930.xsd#RelatedPartyTransactions"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/RelatedPartyTransactions" xlink:type="extended" id="icec951b80fee48a99b76e0b40efa2c01_db1a71df-e471-439c-9586-002e7e2eba9d"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatements" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatingFinancialStatements"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatements" xlink:type="extended" id="i633ecf3634f246e1a23756b38d72ca5a_261fe578-90c2-471a-8763-87ef1c55f9cb"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatementsTables" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatingFinancialStatementsTables"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatementsTables" xlink:type="extended" id="iae208ea8579844518373160fc3ed98af_511371ee-086d-430a-817f-b9830d21507e"/>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatementsCondensedConsolidatingStatementsofComprehensiveIncomeDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatingFinancialStatementsCondensedConsolidatingStatementsofComprehensiveIncomeDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatementsCondensedConsolidatingStatementsofComprehensiveIncomeDetails" xlink:type="extended" id="i7c51c2f0e87f4dfa9228d6118c3f762e_91ce64b1-49e3-49bf-adeb-b24808509948">
<link:loc xlink:type="locator" xlink:label="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:href="fet-20190930.xsd#fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_fe42c72b-065e-468f-9855-000dd34b0ce8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_fe42c72b-065e-468f-9855-000dd34b0ce8" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_510a278b-c4be-4d46-8612-df708405dbef" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_510a278b-c4be-4d46-8612-df708405dbef" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_84a4b1da-8aba-482f-800c-c5d86b9c22e3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrossProfit"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_GrossProfit_84a4b1da-8aba-482f-800c-c5d86b9c22e3" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_051fb249-48ce-456c-9ae0-bc61c1ab89fb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpensesAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_OperatingExpensesAbstract_051fb249-48ce-456c-9ae0-bc61c1ab89fb" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_11c63c80-132d-4059-85fd-f9687782a0cc" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_051fb249-48ce-456c-9ae0-bc61c1ab89fb" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_11c63c80-132d-4059-85fd-f9687782a0cc" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_73e130ec-334a-4f18-87ba-e2f41e91d9d3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_051fb249-48ce-456c-9ae0-bc61c1ab89fb" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_73e130ec-334a-4f18-87ba-e2f41e91d9d3" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_a28de792-097c-4ff6-b73b-91a8249c4d6c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_051fb249-48ce-456c-9ae0-bc61c1ab89fb" xlink:to="loc_us-gaap_AssetImpairmentCharges_a28de792-097c-4ff6-b73b-91a8249c4d6c" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_4e6aeb71-ba1f-4da4-a904-0d024f28a7f1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_051fb249-48ce-456c-9ae0-bc61c1ab89fb" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_4e6aeb71-ba1f-4da4-a904-0d024f28a7f1" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfAssets_307d6372-6526-4f50-8382-5e1391693806" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainsLossesOnSalesOfAssets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_051fb249-48ce-456c-9ae0-bc61c1ab89fb" xlink:to="loc_us-gaap_GainsLossesOnSalesOfAssets_307d6372-6526-4f50-8382-5e1391693806" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_c3e2fc50-7f28-4db5-a9d8-096d2336d79d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_OperatingExpenses_c3e2fc50-7f28-4db5-a9d8-096d2336d79d" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_81f2cbb4-9e3b-4ffa-b577-c05ac0ae311e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_81f2cbb4-9e3b-4ffa-b577-c05ac0ae311e" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_EquityEarningsfromAffiliateNetofTax_81a6c44a-9259-4249-a2ad-75f24faa524c" xlink:href="fet-20190930.xsd#fet_EquityEarningsfromAffiliateNetofTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_fet_EquityEarningsfromAffiliateNetofTax_81a6c44a-9259-4249-a2ad-75f24faa524c" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_3337a542-baa3-45cd-9999-6ccfa432340f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_OperatingIncomeLoss_3337a542-baa3-45cd-9999-6ccfa432340f" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f21f6615-442f-4b75-a461-5e89cd0874bf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f21f6615-442f-4b75-a461-5e89cd0874bf" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_84616967-778e-4048-a028-c5d844fd44df" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f21f6615-442f-4b75-a461-5e89cd0874bf" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_84616967-778e-4048-a028-c5d844fd44df" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_c5276ea1-09f8-47b1-bddd-25b971e4d426" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f21f6615-442f-4b75-a461-5e89cd0874bf" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_c5276ea1-09f8-47b1-bddd-25b971e4d426" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainOrLossOnSaleOfPreviouslyUnissuedStockByEquityInvestee_43573abc-1e6b-4ce2-80c7-d1f98cb40c8f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainOrLossOnSaleOfPreviouslyUnissuedStockByEquityInvestee"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f21f6615-442f-4b75-a461-5e89cd0874bf" xlink:to="loc_us-gaap_GainOrLossOnSaleOfPreviouslyUnissuedStockByEquityInvestee_43573abc-1e6b-4ce2-80c7-d1f98cb40c8f" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_809e69eb-a07c-4a39-9792-f42a0b1b890a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f21f6615-442f-4b75-a461-5e89cd0874bf" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_809e69eb-a07c-4a39-9792-f42a0b1b890a" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_2c6bed3b-e1f3-4df4-a350-a6cd4e94e344" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_f21f6615-442f-4b75-a461-5e89cd0874bf" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_2c6bed3b-e1f3-4df4-a350-a6cd4e94e344" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_783f5c37-e18a-4c52-995e-6c4a1b646b8c" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_783f5c37-e18a-4c52-995e-6c4a1b646b8c" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8622b5a5-2619-4351-a6df-7b8ba8a62c3a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8622b5a5-2619-4351-a6df-7b8ba8a62c3a" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_1924329b-874f-42a8-a0a8-936b6f48ddec" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_ProfitLoss_1924329b-874f-42a8-a0a8-936b6f48ddec" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_813ca939-1d4a-4688-8394-138d039ef3b3" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_813ca939-1d4a-4688-8394-138d039ef3b3" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_e1460c3d-f060-49eb-8ebf-23d08e227dfe" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_31a79eae-8ee8-43dd-9e46-84d0322642c5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_813ca939-1d4a-4688-8394-138d039ef3b3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_31a79eae-8ee8-43dd-9e46-84d0322642c5" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_83e56790-44cd-4566-80d6-e18f5164ca51" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_813ca939-1d4a-4688-8394-138d039ef3b3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_83e56790-44cd-4566-80d6-e18f5164ca51" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_30493523-553f-4ebc-9f2a-82bf3adbe3c7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_813ca939-1d4a-4688-8394-138d039ef3b3" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_30493523-553f-4ebc-9f2a-82bf3adbe3c7" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeTable_0d7353f6-da55-449f-af55-7dc7d5f9d289" xlink:href="fet-20190930.xsd#fet_CondensedStatementsofIncomeandComprehensiveIncomeTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeLineItems_0cecd4d7-804d-4401-a379-0c8b9c8735a6" xlink:to="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeTable_0d7353f6-da55-449f-af55-7dc7d5f9d289" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_5c355a27-c8bc-49f1-8890-4209abe3ec15" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeTable_0d7353f6-da55-449f-af55-7dc7d5f9d289" xlink:to="loc_srt_ConsolidationItemsAxis_5c355a27-c8bc-49f1-8890-4209abe3ec15" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_5c355a27-c8bc-49f1-8890-4209abe3ec15_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_5c355a27-c8bc-49f1-8890-4209abe3ec15" xlink:to="loc_srt_ConsolidationItemsDomain_5c355a27-c8bc-49f1-8890-4209abe3ec15_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_81791cf2-994a-4efb-9654-fafe905b8222" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_5c355a27-c8bc-49f1-8890-4209abe3ec15" xlink:to="loc_srt_ConsolidationItemsDomain_81791cf2-994a-4efb-9654-fafe905b8222" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ReportableLegalEntitiesMember_891d8676-d61c-4df3-94ae-cbe7ba007889" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ReportableLegalEntitiesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_81791cf2-994a-4efb-9654-fafe905b8222" xlink:to="loc_srt_ReportableLegalEntitiesMember_891d8676-d61c-4df3-94ae-cbe7ba007889" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationEliminationsMember_9a85b44e-6550-476e-895f-a5d1d1d8e5f5" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationEliminationsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_81791cf2-994a-4efb-9654-fafe905b8222" xlink:to="loc_srt_ConsolidationEliminationsMember_9a85b44e-6550-476e-895f-a5d1d1d8e5f5" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_175f64f9-5386-4750-92d1-0cd40c151fe3" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fet_CondensedStatementsofIncomeandComprehensiveIncomeTable_0d7353f6-da55-449f-af55-7dc7d5f9d289" xlink:to="loc_srt_ConsolidatedEntitiesAxis_175f64f9-5386-4750-92d1-0cd40c151fe3" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_175f64f9-5386-4750-92d1-0cd40c151fe3_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_175f64f9-5386-4750-92d1-0cd40c151fe3" xlink:to="loc_srt_ConsolidatedEntitiesDomain_175f64f9-5386-4750-92d1-0cd40c151fe3_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_640445c8-e913-4e6c-8e24-8443b9c3b0cc" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_175f64f9-5386-4750-92d1-0cd40c151fe3" xlink:to="loc_srt_ConsolidatedEntitiesDomain_640445c8-e913-4e6c-8e24-8443b9c3b0cc" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_f5ec7a99-bc69-4690-9a17-eea00c91609a" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ParentCompanyMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_640445c8-e913-4e6c-8e24-8443b9c3b0cc" xlink:to="loc_srt_ParentCompanyMember_f5ec7a99-bc69-4690-9a17-eea00c91609a" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_GuarantorSubsidiariesMember_c7566d2d-b52f-4d27-9955-b0ef608fb88c" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_GuarantorSubsidiariesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_640445c8-e913-4e6c-8e24-8443b9c3b0cc" xlink:to="loc_srt_GuarantorSubsidiariesMember_c7566d2d-b52f-4d27-9955-b0ef608fb88c" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_NonGuarantorSubsidiariesMember_5df44b68-cfce-43e1-968a-79f341dd8b35" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NonGuarantorSubsidiariesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_640445c8-e913-4e6c-8e24-8443b9c3b0cc" xlink:to="loc_srt_NonGuarantorSubsidiariesMember_5df44b68-cfce-43e1-968a-79f341dd8b35" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatementsCondensedConsolidatingBalanceSheetsDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatingFinancialStatementsCondensedConsolidatingBalanceSheetsDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatementsCondensedConsolidatingBalanceSheetsDetails" xlink:type="extended" id="id927bf3c075d4bc0b11cb493eef8d5bb_1d724ef9-9c1a-4bbe-8c07-90d01c9cee73">
<link:loc xlink:type="locator" xlink:label="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_2029137c-1963-4049-8935-e03453960b10" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedBalanceSheetStatementsCaptionsLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_2029137c-1963-4049-8935-e03453960b10" xlink:to="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrentAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_a43aa44f-1388-4032-b71b-80ac16f8b4cf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_a43aa44f-1388-4032-b71b-80ac16f8b4cf" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_a5239fe9-a9bf-40ec-b416-0b96fb13b58b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_a5239fe9-a9bf-40ec-b416-0b96fb13b58b" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_12f72207-b265-45e9-9f74-eec50fcea6b0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:to="loc_us-gaap_InventoryNet_12f72207-b265-45e9-9f74-eec50fcea6b0" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_54faf528-2783-4f2a-ac69-c52ef7cd95a1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_54faf528-2783-4f2a-ac69-c52ef7cd95a1" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ContractWithCustomerAssetAccruedRevenue_627f5675-7b27-456d-9b1b-c99788446de0" xlink:href="fet-20190930.xsd#fet_ContractWithCustomerAssetAccruedRevenue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:to="loc_fet_ContractWithCustomerAssetAccruedRevenue_627f5675-7b27-456d-9b1b-c99788446de0" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ContractWithCustomerAssetCostsinExcessofBillings_5cda245a-e331-4187-bdde-e451d3a9514e" xlink:href="fet-20190930.xsd#fet_ContractWithCustomerAssetCostsinExcessofBillings"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:to="loc_fet_ContractWithCustomerAssetCostsinExcessofBillings_5cda245a-e331-4187-bdde-e451d3a9514e" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_05d3f1cc-2895-41ed-9d68-17f63e6f3770" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_adccdc11-85c6-4a0d-8400-c7d94dc56f63" xlink:to="loc_us-gaap_AssetsCurrent_05d3f1cc-2895-41ed-9d68-17f63e6f3770" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f3699acc-f1f4-4b94-b2ce-e33829a88c32" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_f3699acc-f1f4-4b94-b2ce-e33829a88c32" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_06638a5e-25bc-4a51-a98f-b2fa2b63ff3f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_06638a5e-25bc-4a51-a98f-b2fa2b63ff3f" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_097d3c6b-9caf-4fab-9f9d-37f659337e71" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_097d3c6b-9caf-4fab-9f9d-37f659337e71" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_290ab926-3178-42f2-bf14-898e0a3551f0" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_290ab926-3178-42f2-bf14-898e0a3551f0" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_c7c47065-ae11-42a1-bd0f-3e3a7adf84f1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_Goodwill_c7c47065-ae11-42a1-bd0f-3e3a7adf84f1" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_89810974-6ebb-4338-bfca-2be0d410b7c4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvestments"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_EquityMethodInvestments_89810974-6ebb-4338-bfca-2be0d410b7c4" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_b90076ae-72c6-467a-a6ac-785b9cc12d02" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_b90076ae-72c6-467a-a6ac-785b9cc12d02" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_fb865a5c-384f-4aad-92ef-4794b637d397" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_fb865a5c-384f-4aad-92ef-4794b637d397" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_InvestmentinAffiliates_d794b682-ccc5-44af-8048-8479096c85a0" xlink:href="fet-20190930.xsd#fet_InvestmentinAffiliates"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_fet_InvestmentinAffiliates_d794b682-ccc5-44af-8048-8479096c85a0" xlink:type="arc" order="10"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvancesToAffiliate_4192de61-588a-433c-a354-98d3c4982fa5" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdvancesToAffiliate"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_AdvancesToAffiliate_4192de61-588a-433c-a354-98d3c4982fa5" xlink:type="arc" order="11"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_cac8e184-21ab-4812-974d-3854be79e08e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_518d0dbd-0f0f-4587-b0d7-d91ef4c871f9" xlink:to="loc_us-gaap_Assets_cac8e184-21ab-4812-974d-3854be79e08e" xlink:type="arc" order="12"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_2029137c-1963-4049-8935-e03453960b10" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_b683541a-2aca-4e32-9067-95af00703ffb" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_b683541a-2aca-4e32-9067-95af00703ffb" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_8e68b810-98dc-446a-8eca-505458d08508" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b683541a-2aca-4e32-9067-95af00703ffb" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_8e68b810-98dc-446a-8eca-505458d08508" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_7432c9a1-3f01-4995-ad90-6dc58b635a0a" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b683541a-2aca-4e32-9067-95af00703ffb" xlink:to="loc_us-gaap_AccountsPayableCurrent_7432c9a1-3f01-4995-ad90-6dc58b635a0a" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_5093079d-dcbb-4a57-8727-0fad0e888b1f" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b683541a-2aca-4e32-9067-95af00703ffb" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_5093079d-dcbb-4a57-8727-0fad0e888b1f" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ContractWithCustomerLiabilityDeferredRevenue_87f04d31-ae8e-4006-bd1f-97e7fb992b85" xlink:href="fet-20190930.xsd#fet_ContractWithCustomerLiabilityDeferredRevenue"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b683541a-2aca-4e32-9067-95af00703ffb" xlink:to="loc_fet_ContractWithCustomerLiabilityDeferredRevenue_87f04d31-ae8e-4006-bd1f-97e7fb992b85" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_ContractWithCustomerLiabilityBillingsInExcessOfCost_d11dbc27-ac19-451c-8c16-0f0b210c5273" xlink:href="fet-20190930.xsd#fet_ContractWithCustomerLiabilityBillingsInExcessOfCost"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b683541a-2aca-4e32-9067-95af00703ffb" xlink:to="loc_fet_ContractWithCustomerLiabilityBillingsInExcessOfCost_d11dbc27-ac19-451c-8c16-0f0b210c5273" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_4d29d018-1b6d-49fc-be96-d18a3cc1207b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b683541a-2aca-4e32-9067-95af00703ffb" xlink:to="loc_us-gaap_LiabilitiesCurrent_4d29d018-1b6d-49fc-be96-d18a3cc1207b" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_a95c0fa4-90ba-4964-9b1f-3b88fa540baf" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_a95c0fa4-90ba-4964-9b1f-3b88fa540baf" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_66a726eb-9e4a-4aad-8114-92205f593960" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_66a726eb-9e4a-4aad-8114-92205f593960" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_88f6e2f1-6224-4d56-a7ba-96421292c5b8" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_88f6e2f1-6224-4d56-a7ba-96421292c5b8" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_19e8cf13-3025-4d2b-a2d9-51c511d1e9bd" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_19e8cf13-3025-4d2b-a2d9-51c511d1e9bd" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_LongtermLoansandPayablestoAffiliates_e636d633-a474-4144-80d9-9f58c980f60d" xlink:href="fet-20190930.xsd#fet_LongtermLoansandPayablestoAffiliates"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_fet_LongtermLoansandPayablestoAffiliates_e636d633-a474-4144-80d9-9f58c980f60d" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_648f791b-921c-4e83-8e5e-8bf5e5000602" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_us-gaap_Liabilities_648f791b-921c-4e83-8e5e-8bf5e5000602" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_9e746e33-7ca6-45bd-867d-16504eb56274" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_9e746e33-7ca6-45bd-867d-16504eb56274" xlink:type="arc" order="8"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_b837f87b-2e1e-4ec9-98a7-7e5f6ad5e27b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_dd6291cd-d6b3-47fb-bbed-be5b9cc997dd" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_b837f87b-2e1e-4ec9-98a7-7e5f6ad5e27b" xlink:type="arc" order="9"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_CondensedBalanceSheetStatementTable_595a3940-1bfa-4e9a-a1d8-fa3e863d52c0" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedBalanceSheetStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_2029137c-1963-4049-8935-e03453960b10" xlink:to="loc_srt_CondensedBalanceSheetStatementTable_595a3940-1bfa-4e9a-a1d8-fa3e863d52c0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_86fab10c-ff00-4e53-9f67-d5372a86bc18" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_595a3940-1bfa-4e9a-a1d8-fa3e863d52c0" xlink:to="loc_srt_ConsolidationItemsAxis_86fab10c-ff00-4e53-9f67-d5372a86bc18" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_86fab10c-ff00-4e53-9f67-d5372a86bc18_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_86fab10c-ff00-4e53-9f67-d5372a86bc18" xlink:to="loc_srt_ConsolidationItemsDomain_86fab10c-ff00-4e53-9f67-d5372a86bc18_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_78f1ef71-319a-4970-994b-46755ad2622e" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_86fab10c-ff00-4e53-9f67-d5372a86bc18" xlink:to="loc_srt_ConsolidationItemsDomain_78f1ef71-319a-4970-994b-46755ad2622e" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ReportableLegalEntitiesMember_7e799b63-3060-488c-a935-2c818aa532e7" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ReportableLegalEntitiesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_78f1ef71-319a-4970-994b-46755ad2622e" xlink:to="loc_srt_ReportableLegalEntitiesMember_7e799b63-3060-488c-a935-2c818aa532e7" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationEliminationsMember_f7ec38f8-8aae-4505-91be-1d19eb59042b" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationEliminationsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_78f1ef71-319a-4970-994b-46755ad2622e" xlink:to="loc_srt_ConsolidationEliminationsMember_f7ec38f8-8aae-4505-91be-1d19eb59042b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_744f9680-02dd-4a7f-beb8-c1a1ef0c2041" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_595a3940-1bfa-4e9a-a1d8-fa3e863d52c0" xlink:to="loc_srt_ConsolidatedEntitiesAxis_744f9680-02dd-4a7f-beb8-c1a1ef0c2041" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_744f9680-02dd-4a7f-beb8-c1a1ef0c2041_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_744f9680-02dd-4a7f-beb8-c1a1ef0c2041" xlink:to="loc_srt_ConsolidatedEntitiesDomain_744f9680-02dd-4a7f-beb8-c1a1ef0c2041_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_f61e1e32-5bd1-4b96-9ebd-2f17ad91f7ef" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_744f9680-02dd-4a7f-beb8-c1a1ef0c2041" xlink:to="loc_srt_ConsolidatedEntitiesDomain_f61e1e32-5bd1-4b96-9ebd-2f17ad91f7ef" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_726716d2-78d9-4cb0-a84b-2c9d72aed8e0" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ParentCompanyMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_f61e1e32-5bd1-4b96-9ebd-2f17ad91f7ef" xlink:to="loc_srt_ParentCompanyMember_726716d2-78d9-4cb0-a84b-2c9d72aed8e0" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_GuarantorSubsidiariesMember_465db8dc-094e-4a30-b1a3-57f16780ecbc" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_GuarantorSubsidiariesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_f61e1e32-5bd1-4b96-9ebd-2f17ad91f7ef" xlink:to="loc_srt_GuarantorSubsidiariesMember_465db8dc-094e-4a30-b1a3-57f16780ecbc" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_NonGuarantorSubsidiariesMember_a107e8ef-0043-49d2-ad2a-21003d397e5d" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NonGuarantorSubsidiariesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_f61e1e32-5bd1-4b96-9ebd-2f17ad91f7ef" xlink:to="loc_srt_NonGuarantorSubsidiariesMember_a107e8ef-0043-49d2-ad2a-21003d397e5d" xlink:type="arc" order="2"/>
</link:definitionLink>
<link:roleRef roleURI="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatementsCondensedConsolidatingStatementsofCashFlowsDetails" xlink:type="simple" xlink:href="fet-20190930.xsd#CondensedConsolidatingFinancialStatementsCondensedConsolidatingStatementsofCashFlowsDetails"/>
<link:definitionLink xlink:role="http://www.f-e-t.com/role/CondensedConsolidatingFinancialStatementsCondensedConsolidatingStatementsofCashFlowsDetails" xlink:type="extended" id="id37af5f634a34946894f43f41c8b8043_a1d02e71-7f97-403e-bd49-9ca9a66c18d0">
<link:loc xlink:type="locator" xlink:label="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_74d90752-6096-45d1-a8df-35b7cdab66d7" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedCashFlowStatementsCaptionsLineItems"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ff7d8e39-2429-49bf-a4b6-460788287ae6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_74d90752-6096-45d1-a8df-35b7cdab66d7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ff7d8e39-2429-49bf-a4b6-460788287ae6" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6becec16-0c27-4796-acac-7779427ade6b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_74d90752-6096-45d1-a8df-35b7cdab66d7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6becec16-0c27-4796-acac-7779427ade6b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_431457c2-df44-4b0c-a949-bdfb592d082b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6becec16-0c27-4796-acac-7779427ade6b" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_431457c2-df44-4b0c-a949-bdfb592d082b" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_a4a0e237-18af-4779-b099-5be05494d7f7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6becec16-0c27-4796-acac-7779427ade6b" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_a4a0e237-18af-4779-b099-5be05494d7f7" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_2722f3c4-ec5e-4464-8be0-671f4081ae1b" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6becec16-0c27-4796-acac-7779427ade6b" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_2722f3c4-ec5e-4464-8be0-671f4081ae1b" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_PaymentsforProceedsfromIntercompanyLoansInvestingActivities_43f84048-effe-43fa-a8bc-1e1b63040301" xlink:href="fet-20190930.xsd#fet_PaymentsforProceedsfromIntercompanyLoansInvestingActivities"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6becec16-0c27-4796-acac-7779427ade6b" xlink:to="loc_fet_PaymentsforProceedsfromIntercompanyLoansInvestingActivities_43f84048-effe-43fa-a8bc-1e1b63040301" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_72fefefe-4a29-4a88-882b-4f7002fef77d" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6becec16-0c27-4796-acac-7779427ade6b" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_72fefefe-4a29-4a88-882b-4f7002fef77d" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_74d90752-6096-45d1-a8df-35b7cdab66d7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_bae07d88-7969-45c6-8c8e-0d5058772de4" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_bae07d88-7969-45c6-8c8e-0d5058772de4" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_2e8cecd4-a3b2-4eef-a845-df611d6cabf7" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfDebt"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:to="loc_us-gaap_RepaymentsOfDebt_2e8cecd4-a3b2-4eef-a845-df611d6cabf7" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_edf6667f-699c-4af0-9a2b-8ec860c0f14e" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_edf6667f-699c-4af0-9a2b-8ec860c0f14e" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_420f8e35-9da0-451a-8676-3eeb8477bbc6" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_420f8e35-9da0-451a-8676-3eeb8477bbc6" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_PaymentsforProceedsfromIntercompanyLoansFinancingActivities_b7db7833-926d-4c69-ba8f-29790d305a76" xlink:href="fet-20190930.xsd#fet_PaymentsforProceedsfromIntercompanyLoansFinancingActivities"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:to="loc_fet_PaymentsforProceedsfromIntercompanyLoansFinancingActivities_b7db7833-926d-4c69-ba8f-29790d305a76" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_fet_PaymentOfDividendsToAffiliates_252dc3df-737f-4df3-aadf-654a1f0033a9" xlink:href="fet-20190930.xsd#fet_PaymentOfDividendsToAffiliates"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:to="loc_fet_PaymentOfDividendsToAffiliates_252dc3df-737f-4df3-aadf-654a1f0033a9" xlink:type="arc" order="6"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_e60552b2-6c46-439c-bec3-b74062bc52d2" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_51fbfe5a-c343-4b06-a097-fc2895f6a039" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_e60552b2-6c46-439c-bec3-b74062bc52d2" xlink:type="arc" order="7"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_fcdb8ba9-84d0-485c-89c3-871780439196" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_74d90752-6096-45d1-a8df-35b7cdab66d7" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_fcdb8ba9-84d0-485c-89c3-871780439196" xlink:type="arc" order="3"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_1d337b0c-2bb4-4dbc-8735-b0d189753227" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_74d90752-6096-45d1-a8df-35b7cdab66d7" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_1d337b0c-2bb4-4dbc-8735-b0d189753227" xlink:type="arc" order="4"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_f98856fe-8816-47ec-a17b-84444d9e4dc1" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_74d90752-6096-45d1-a8df-35b7cdab66d7" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_f98856fe-8816-47ec-a17b-84444d9e4dc1" xlink:type="arc" order="5"/>
<link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_f3567698-cbec-448f-92a1-d0a7a1dabbae" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_CondensedCashFlowStatementTable_7c8c1f58-d9ec-465c-997a-f77b14ee0944" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedCashFlowStatementTable"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_74d90752-6096-45d1-a8df-35b7cdab66d7" xlink:to="loc_srt_CondensedCashFlowStatementTable_7c8c1f58-d9ec-465c-997a-f77b14ee0944" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_afedd5ef-2bc5-425d-8967-947e61e51230" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedCashFlowStatementTable_7c8c1f58-d9ec-465c-997a-f77b14ee0944" xlink:to="loc_srt_ConsolidationItemsAxis_afedd5ef-2bc5-425d-8967-947e61e51230" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_afedd5ef-2bc5-425d-8967-947e61e51230_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_afedd5ef-2bc5-425d-8967-947e61e51230" xlink:to="loc_srt_ConsolidationItemsDomain_afedd5ef-2bc5-425d-8967-947e61e51230_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_63239081-9d2c-4abd-8af1-895923459d85" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationItemsDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_afedd5ef-2bc5-425d-8967-947e61e51230" xlink:to="loc_srt_ConsolidationItemsDomain_63239081-9d2c-4abd-8af1-895923459d85" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ReportableLegalEntitiesMember_f8d485a6-3d40-440a-bd24-9f50c3a3ef6c" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ReportableLegalEntitiesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_63239081-9d2c-4abd-8af1-895923459d85" xlink:to="loc_srt_ReportableLegalEntitiesMember_f8d485a6-3d40-440a-bd24-9f50c3a3ef6c" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationEliminationsMember_84d2b8d0-a488-44e4-bb00-15c17981fdfa" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidationEliminationsMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_63239081-9d2c-4abd-8af1-895923459d85" xlink:to="loc_srt_ConsolidationEliminationsMember_84d2b8d0-a488-44e4-bb00-15c17981fdfa" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_6855cf4d-8f6f-4791-9245-d17fbe712b71" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedCashFlowStatementTable_7c8c1f58-d9ec-465c-997a-f77b14ee0944" xlink:to="loc_srt_ConsolidatedEntitiesAxis_6855cf4d-8f6f-4791-9245-d17fbe712b71" xlink:type="arc" order="2"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_6855cf4d-8f6f-4791-9245-d17fbe712b71_default" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_6855cf4d-8f6f-4791-9245-d17fbe712b71" xlink:to="loc_srt_ConsolidatedEntitiesDomain_6855cf4d-8f6f-4791-9245-d17fbe712b71_default" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_ab7e90b8-1937-48e2-903f-b660eaf0ad05" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesDomain"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_6855cf4d-8f6f-4791-9245-d17fbe712b71" xlink:to="loc_srt_ConsolidatedEntitiesDomain_ab7e90b8-1937-48e2-903f-b660eaf0ad05" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_44090650-b6ad-4f97-ae9d-33eb48603335" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ParentCompanyMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_ab7e90b8-1937-48e2-903f-b660eaf0ad05" xlink:to="loc_srt_ParentCompanyMember_44090650-b6ad-4f97-ae9d-33eb48603335" xlink:type="arc" order="0"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_GuarantorSubsidiariesMember_f152ce66-3f74-4456-a129-f441858aa149" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_GuarantorSubsidiariesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_ab7e90b8-1937-48e2-903f-b660eaf0ad05" xlink:to="loc_srt_GuarantorSubsidiariesMember_f152ce66-3f74-4456-a129-f441858aa149" xlink:type="arc" order="1"/>
<link:loc xlink:type="locator" xlink:label="loc_srt_NonGuarantorSubsidiariesMember_d8301a4a-36ec-4cb0-af2c-d5cf24492b62" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_NonGuarantorSubsidiariesMember"/>
<link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_ab7e90b8-1937-48e2-903f-b660eaf0ad05" xlink:to="loc_srt_NonGuarantorSubsidiariesMember_d8301a4a-36ec-4cb0-af2c-d5cf24492b62" xlink:type="arc" order="2"/>
</link:definitionLink>
</link:linkbase>

Top
Filing Submission 0001401257-19-000164   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
AboutPrivacyRedactionsHelp — Mon., Apr. 29, 8:51:46.1am ET