| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" standalone="yes" encoding="windows-1252"?> |
<!-- XBRL Document Created with XBRLMaster --> |
<!-- Version: 1.3.08 --> |
<!-- Based on XBRL 2.1 --> |
<!-- Date of creation: 02/10/2020 --> |
<!-- Copyright (c) 2020 NTDAS Inc. All Rights Reserved. --> |
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"> |
| <link:roleRef roleURI="http://petro-gas.co/role/DocumentAndEntityInformation" xlink:href="ptco-20191231.xsd#DocumentAndEntityInformation" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/BalanceSheets" xlink:href="ptco-20191231.xsd#BalanceSheets" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/BalanceSheetsParenthetical" xlink:href="ptco-20191231.xsd#BalanceSheetsParenthetical" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/StatementsOfOperations" xlink:href="ptco-20191231.xsd#StatementsOfOperations" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/StatementOfStockholdersEquity" xlink:href="ptco-20191231.xsd#StatementOfStockholdersEquity" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/StatementOfCashFlows" xlink:href="ptco-20191231.xsd#StatementOfCashFlows" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/DescriptionOfBusinessAndBasisOfPersentation" xlink:href="ptco-20191231.xsd#DescriptionOfBusinessAndBasisOfPersentation" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/GoingConcern" xlink:href="ptco-20191231.xsd#GoingConcern" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/SummaryOfSignificantAccountingPolicies" xlink:href="ptco-20191231.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/AssetRetirementObligations" xlink:href="ptco-20191231.xsd#AssetRetirementObligations" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/PromissoryNoteRelatedParty" xlink:href="ptco-20191231.xsd#PromissoryNoteRelatedParty" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/PromissoryNote" xlink:href="ptco-20191231.xsd#PromissoryNote" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/ConvertiblePromissoryNotes" xlink:href="ptco-20191231.xsd#ConvertiblePromissoryNotes" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/CommonStock" xlink:href="ptco-20191231.xsd#CommonStock" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/RelatedPartyTransactions" xlink:href="ptco-20191231.xsd#RelatedPartyTransactions" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/SubsequentEvents" xlink:href="ptco-20191231.xsd#SubsequentEvents" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="ptco-20191231.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/AssetRetirementObligationsTables" xlink:href="ptco-20191231.xsd#AssetRetirementObligationsTables" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/DescriptionOfBusinessAndBasisOfPersentationDetailsNarrative" xlink:href="ptco-20191231.xsd#DescriptionOfBusinessAndBasisOfPersentationDetailsNarrative" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/GoingConcernDetailsNarrative" xlink:href="ptco-20191231.xsd#GoingConcernDetailsNarrative" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:href="ptco-20191231.xsd#SummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/AssetRetirementObligationsDetails" xlink:href="ptco-20191231.xsd#AssetRetirementObligationsDetails" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/AssetRetirementObligationsDetailsNarrative" xlink:href="ptco-20191231.xsd#AssetRetirementObligationsDetailsNarrative" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/PromissoryNoteRelatedPartyDetailsNarrative" xlink:href="ptco-20191231.xsd#PromissoryNoteRelatedPartyDetailsNarrative" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/PromissoryNoteDetailsNarrative" xlink:href="ptco-20191231.xsd#PromissoryNoteDetailsNarrative" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/ConvertiblePromissoryNotesDetailsNarrative" xlink:href="ptco-20191231.xsd#ConvertiblePromissoryNotesDetailsNarrative" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/CommonStockDetailsNarrative" xlink:href="ptco-20191231.xsd#CommonStockDetailsNarrative" xlink:type="simple"/> |
| <link:roleRef roleURI="http://petro-gas.co/role/RelatedPartyTransactionsDetailsNarrative" xlink:href="ptco-20191231.xsd#RelatedPartyTransactionsDetailsNarrative" xlink:type="simple"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/DocumentAndEntityInformation" xlink:title="00000001 - Document - Document and Entity Information"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/BalanceSheets" xlink:title="0000002 - Statement - BALANCE SHEETS"> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaapAssetsCurrent"/> |
| | <link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaapCashAndCashEquivalentsAtCarryingValue"/> |
| | <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapCashAndCashEquivalentsAtCarryingValue" xlink:type="arc" weight="1"/> |
| | </link:calculationLink> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/BalanceSheetsParenthetical" xlink:title="0000003 - Statement - BALANCE SHEETS (Parenthetical)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/StatementsOfOperations" xlink:title="0000004 - Statement - STATEMENTS OF OPERATIONS"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/StatementOfStockholdersEquity" xlink:title="0000005 - Statement - Statement Of Stockholder's Equity"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/StatementOfCashFlows" xlink:title="0000006 - Statement - STATEMENT OF CASH FLOWS"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/DescriptionOfBusinessAndBasisOfPersentation" xlink:title="0000007 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PERSENTATION"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/GoingConcern" xlink:title="0000008 - Disclosure - GOING CONCERN"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/SummaryOfSignificantAccountingPolicies" xlink:title="0000009 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/AssetRetirementObligations" xlink:title="000010 - Disclosure - ASSET RETIREMENT OBLIGATIONS"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/PromissoryNoteRelatedParty" xlink:title="000011 - Disclosure - PROMISSORY NOTE RELATED PARTY"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/PromissoryNote" xlink:title="000012 - Disclosure - PROMISSORY NOTE"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/ConvertiblePromissoryNotes" xlink:title="000013 - Disclosure - CONVERTIBLE PROMISSORY NOTES"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/CommonStock" xlink:title="000014 - Disclosure - COMMON STOCK"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/RelatedPartyTransactions" xlink:title="000015 - Disclosure - RELATED PARTY TRANSACTIONS"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/SubsequentEvents" xlink:title="000016 - Disclosure - SUBSEQUENT EVENTS"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:title="000017 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/AssetRetirementObligationsTables" xlink:title="000018 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Tables)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/DescriptionOfBusinessAndBasisOfPersentationDetailsNarrative" xlink:title="000019 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PERSENTATION (Details Narrative)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/GoingConcernDetailsNarrative" xlink:title="000020 - Disclosure - GOING CONCERN (Details Narrative)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" xlink:title="000021 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/AssetRetirementObligationsDetails" xlink:title="000022 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Details)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/AssetRetirementObligationsDetailsNarrative" xlink:title="000023 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Details Narrative)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/PromissoryNoteRelatedPartyDetailsNarrative" xlink:title="000024 - Disclosure - PROMISSORY NOTE - RELATED PARTY (Details Narrative)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/PromissoryNoteDetailsNarrative" xlink:title="000025 - Disclosure - PROMISSORY NOTE (Details Narrative)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/ConvertiblePromissoryNotesDetailsNarrative" xlink:title="000026 - Disclosure - CONVERTIBLE PROMISSORY NOTES (Details Narrative)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/CommonStockDetailsNarrative" xlink:title="000027 - Disclosure - COMMON STOCK (Details Narrative)"/> |
| <link:calculationLink xlink:type="extended" xlink:role="http://petro-gas.co/role/RelatedPartyTransactionsDetailsNarrative" xlink:title="000028 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative)"/> |
| </link:linkbase> |