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<?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: 10/30/2019 --> |
<!-- Copyright (c) 2019 NTDAS Inc. All Rights Reserved. --> |
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:country="http://xbrl.sec.gov/country/2017-01-31" xmlns:srt="http://fasb.org/srt/2019-01-31" xmlns:utr="http://www.xbrl.org/2009/utr" xmlns:srt-types="http://fasb.org/srt-types/2019-01-31" xmlns:dei="http://xbrl.sec.gov/dei/2018-01-31" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:us-gaap="http://fasb.org/us-gaap/2019-01-31" xmlns:ptco="http://petro-gas.co/20190930" elementFormDefault="qualified" targetNamespace="http://petro-gas.co/20190930"> |
| <annotation> |
| | <appinfo> |
| | | <link:roleType roleURI="http://petro-gas.co/role/DocumentAndEntityInformation" id="DocumentAndEntityInformation"> |
| <link:definition> 0000001 - Document - Document and Entity Information </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/BalanceSheets" id="BalanceSheets"> |
| <link:definition> 0000002 - Statement - BALANCE SHEETS </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/BalanceSheetsParenthetical" id="BalanceSheetsParenthetical"> |
| <link:definition> 0000003 - Statement - BALANCE SHEETS (Parenthetical) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/StatementsOfOperations" id="StatementsOfOperations"> |
| <link:definition> 0000004 - Statement - STATEMENTS OF OPERATIONS </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/StatementOfStockholdersEquity" id="StatementOfStockholdersEquity"> |
| <link:definition> 0000005 - Statement - Statement Of Stockholder's Equity </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/StatementOfCashFlows" id="StatementOfCashFlows"> |
| <link:definition> 0000006 - Statement - STATEMENT OF CASH FLOWS </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/DescriptionOfBusinessAndBasisOfPersentation" id="DescriptionOfBusinessAndBasisOfPersentation"> |
| <link:definition> 0000007 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PERSENTATION </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/GoingConcern" id="GoingConcern"> |
| <link:definition> 0000008 - Disclosure - GOING CONCERN </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/SummaryOfSignificantAccountingPolicies" id="SummaryOfSignificantAccountingPolicies"> |
| <link:definition> 0000009 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/AssetRetirementObligations" id="AssetRetirementObligations"> |
| <link:definition> 000010 - Disclosure - ASSET RETIREMENT OBLIGATIONS </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/PromissoryNoteRelatedParty" id="PromissoryNoteRelatedParty"> |
| <link:definition> 000011 - Disclosure - PROMISSORY NOTE RELATED PARTY </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/PromissoryNote" id="PromissoryNote"> |
| <link:definition> 000012 - Disclosure - PROMISSORY NOTE </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/ConvertiblePromissoryNotes" id="ConvertiblePromissoryNotes"> |
| <link:definition> 000013 - Disclosure - CONVERTIBLE PROMISSORY NOTES </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/CommonStock" id="CommonStock"> |
| <link:definition> 000014 - Disclosure - COMMON STOCK </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/RelatedPartyTransactions" id="RelatedPartyTransactions"> |
| <link:definition> 000015 - Disclosure - RELATED PARTY TRANSACTIONS </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/SubsequentEvents" id="SubsequentEvents"> |
| <link:definition> 000016 - Disclosure - SUBSEQUENT EVENTS </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/SummaryOfSignificantAccountingPoliciesPolicies" id="SummaryOfSignificantAccountingPoliciesPolicies"> |
| <link:definition> 000017 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/AssetRetirementObligationsTables" id="AssetRetirementObligationsTables"> |
| <link:definition> 000018 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Tables) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/DescriptionOfBusinessAndBasisOfPersentationDetailsNarrative" id="DescriptionOfBusinessAndBasisOfPersentationDetailsNarrative"> |
| <link:definition> 000019 - Disclosure - DESCRIPTION OF BUSINESS AND BASIS OF PERSENTATION (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/GoingConcernDetailsNarrative" id="GoingConcernDetailsNarrative"> |
| <link:definition> 000020 - Disclosure - GOING CONCERN (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative" id="SummaryOfSignificantAccountingPoliciesDetailsNarrative"> |
| <link:definition> 000021 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/AssetRetirementObligationsDetails" id="AssetRetirementObligationsDetails"> |
| <link:definition> 000022 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Details) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/AssetRetirementObligationsDetailsNarrative" id="AssetRetirementObligationsDetailsNarrative"> |
| <link:definition> 000023 - Disclosure - ASSET RETIREMENT OBLIGATIONS (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/PromissoryNoteRelatedPartyDetailsNarrative" id="PromissoryNoteRelatedPartyDetailsNarrative"> |
| <link:definition> 000024 - Disclosure - PROMISSORY NOTE - RELATED PARTY (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/PromissoryNoteDetailsNarrative" id="PromissoryNoteDetailsNarrative"> |
| <link:definition> 000025 - Disclosure - PROMISSORY NOTE (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/ConvertiblePromissoryNotesDetailsNarrative" id="ConvertiblePromissoryNotesDetailsNarrative"> |
| <link:definition> 000026 - Disclosure - CONVERTIBLE PROMISSORY NOTES (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/CommonStockDetailsNarrative" id="CommonStockDetailsNarrative"> |
| <link:definition> 000027 - Disclosure - COMMON STOCK (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:roleType roleURI="http://petro-gas.co/role/RelatedPartyTransactionsDetailsNarrative" id="RelatedPartyTransactionsDetailsNarrative"> |
| <link:definition> 000028 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative) </link:definition> |
| <link:usedOn> link:presentationLink </link:usedOn> |
| <link:usedOn> link:calculationLink </link:usedOn> |
| <link:usedOn> link:definitionLink </link:usedOn> |
| </link:roleType> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="ptco-20190930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="ptco-20190930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="ptco-20190930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | <link:linkbaseRef xlink:type="simple" xlink:href="ptco-20190930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/> |
| | | </appinfo> |
| | </annotation> |
| <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/> |
| <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/> |
| <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/> |
| <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/> |
| <import namespace="http://www.xbrl.org/2006/ref" schemaLocation="http://www.xbrl.org/2006/ref-2006-02-27.xsd"/> |
| <import namespace="http://fasb.org/us-types/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-types-2019-01-31.xsd"/> |
| <import namespace="http://fasb.org/srt-types/2019-01-31" schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-types-2019-01-31.xsd"/> |
| <import namespace="http://fasb.org/us-roles/2019-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2019/elts/us-roles-2019-01-31.xsd"/> |
| <import namespace="http://fasb.org/srt/2019-01-31" schemaLocation="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd"/> |
| <import namespace="http://xbrl.sec.gov/country/2017-01-31" schemaLocation="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd"/> |
| <element id="ptco_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_PromissoryNote" name="PromissoryNote" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_ConvertibleNotesDebtDiscount" name="ConvertibleNotesDebtDiscount" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_RoundingOffOfReverseStockSplitShares" name="RoundingOffOfReverseStockSplitShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_RoundingOffOfReverseStockSplitAmount" name="RoundingOffOfReverseStockSplitAmount" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_ConversionOfConvertibleNotesIntoCommonStockShares" name="ConversionOfConvertibleNotesIntoCommonStockShares" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_ConversionOfConvertibleNotesIntoCommonStockAmount" name="ConversionOfConvertibleNotesIntoCommonStockAmount" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_BankIndebtedness" name="BankIndebtedness" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_ConversionOfConvertibleNotesIntoCommonShares" name="ConversionOfConvertibleNotesIntoCommonShares" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_ReclassFromAccountsPayableToPromissoryNotePayable" name="ReclassFromAccountsPayableToPromissoryNotePayable" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_ConvertiblePromissoryNotesTextBlock" name="ConvertiblePromissoryNotesTextBlock" nillable="true" xbrli:periodType="duration" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_StateOrCountryOfIncorporation" name="StateOrCountryOfIncorporation" nillable="true" xbrli:periodType="duration" type="xbrli:normalizedStringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_NumberOfIndividuals" name="NumberOfIndividuals" nillable="true" xbrli:periodType="duration" type="xbrli:integerItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_CommonStockSharesIssuedForAssignmentOfNotesAmount" name="CommonStockSharesIssuedForAssignmentOfNotesAmount" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_NumberOfIndividual" name="NumberOfIndividual" nillable="true" xbrli:periodType="duration" type="xbrli:integerItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_CommonStockSharesIssuedAndOutstandingDecrease" name="CommonStockSharesIssuedAndOutstandingDecrease" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_StockIssuedDuringPeriodSharesForServicesPerShare" name="StockIssuedDuringPeriodSharesForServicesPerShare" nillable="true" xbrli:periodType="duration" type="num:perShareItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_SummaryOfSignificantAccountingPoliciesAbstract" name="SummaryOfSignificantAccountingPoliciesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_PromissoryNoteRelatedPartyAbstract" name="PromissoryNoteRelatedPartyAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_PromissoryNoteAbstract" name="PromissoryNoteAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_ConvertiblePromissoryNotesAbstract" name="ConvertiblePromissoryNotesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_SummaryOfSignificantAccountingPoliciesPoliciesAbstract" name="SummaryOfSignificantAccountingPoliciesPoliciesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_AssetRetirementObligationsTablesAbstract" name="AssetRetirementObligationsTablesAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_DescriptionOfBusinessAndBasisOfPersentationDetailsNarrativeAbstract" name="DescriptionOfBusinessAndBasisOfPersentationDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_GoingConcernDetailsNarrativeAbstract" name="GoingConcernDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_SummaryOfSignificantAccountingPoliciesDetailsNarrativeAbstract" name="SummaryOfSignificantAccountingPoliciesDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_AssetRetirementObligationsDetailsAbstract" name="AssetRetirementObligationsDetailsAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_AssetRetirementObligationsDetailsNarrativeAbstract" name="AssetRetirementObligationsDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_PromissoryNoteRelatedPartyDetailsNarrativeAbstract" name="PromissoryNoteRelatedPartyDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_PromissoryNoteDetailsNarrativeAbstract" name="PromissoryNoteDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_ConvertiblePromissoryNotesDetailsNarrativeAbstract" name="ConvertiblePromissoryNotesDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_CommonStockDetailsNarrativeAbstract" name="CommonStockDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element id="ptco_RelatedPartyTransactionsDetailsNarrativeAbstract" name="RelatedPartyTransactionsDetailsNarrativeAbstract" nillable="true" abstract="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item"/> |
| <element name="PromissoryNoteMember" id="ptco_PromissoryNoteMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item"/> |
| <element name="ConvertiblePromissoryNotesMember" id="ptco_ConvertiblePromissoryNotesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item"/> |
| <element name="AnIndividualMember" id="ptco_AnIndividualMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item"/> |
| <element name="FourIndividualsMember" id="ptco_FourIndividualsMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item"/> |
| <element name="EachIndividualMember" id="ptco_EachIndividualMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item"/> |
| <element name="ThreeUnaffiliatedPartiesMember" id="ptco_ThreeUnaffiliatedPartiesMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item"/> |
| <element name="AprilfourtwothousandnineteenMember" id="ptco_AprilfourtwothousandnineteenMember" nillable="true" xbrli:periodType="duration" type="nonnum:domainItemType" substitutionGroup="xbrli:item"/> |
| </schema> |