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  <xs:element id="nine_AccruedSalariesAndEmployeeBenefitsCurrent" abstract="false" name="AccruedSalariesAndEmployeeBenefitsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_ReorganizationAdjustmentAcrruedInterestSubjectToCompromise" abstract="false" name="ReorganizationAdjustmentAcrruedInterestSubjectToCompromise" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_PrepetitionABLFacilityMember" abstract="true" name="PrepetitionABLFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_TwoThousandAndEighteenABLCreditFacilityMember" abstract="true" name="TwoThousandAndEighteenABLCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_PublicOfferingMember" abstract="true" name="PublicOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_TwoThousandAndTwentyFiveABLCreditFacilityMember" abstract="true" name="TwoThousandAndTwentyFiveABLCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_TwoThousandAndTwentySixABLCreditFacilityMember" abstract="true" name="TwoThousandAndTwentySixABLCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_LineOfCreditFacilityAccordionFeatureIncreaseLimit" abstract="false" name="LineOfCreditFacilityAccordionFeatureIncreaseLimit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_DebtInstrumentInterestRateFloor" abstract="false" name="DebtInstrumentInterestRateFloor" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nine_DebtInstrumentCovenantDebtFixedChargeCoverageRatio" abstract="false" name="DebtInstrumentCovenantDebtFixedChargeCoverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="nine_DebtInstrumentCovenantFixedChargeRationThreshold" abstract="false" name="DebtInstrumentCovenantFixedChargeRationThreshold" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_DebtInstrumentCovenantAvailabilityThreshold" abstract="false" name="DebtInstrumentCovenantAvailabilityThreshold" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="nine_DebtorInPossessionFinancingBorrowingBaseEligibleBilledAccountReceivablePercentage" abstract="false" name="DebtorInPossessionFinancingBorrowingBaseEligibleBilledAccountReceivablePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nine_DebtorInPossessionFinancingBorrowingBaseEligibleUnbilledAccountReceivablePercentage" abstract="false" name="DebtorInPossessionFinancingBorrowingBaseEligibleUnbilledAccountReceivablePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nine_DebtorInPossessionFinancingBorrowingBaseEligibleAmount" abstract="false" name="DebtorInPossessionFinancingBorrowingBaseEligibleAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_DebtorInPossessionFinancingBorrowingBaseEligibleBilledNonAccountReceivablePercentage" abstract="false" name="DebtorInPossessionFinancingBorrowingBaseEligibleBilledNonAccountReceivablePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nine_DebtorInPossessionFinancingBorrowingBaseEligibleBilledNonAccountReceivable" abstract="false" name="DebtorInPossessionFinancingBorrowingBaseEligibleBilledNonAccountReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_DebtorInPossessionFinancingLowerOfCostOrMarketValueOfEligibleInventoryPercentage" abstract="false" name="DebtorInPossessionFinancingLowerOfCostOrMarketValueOfEligibleInventoryPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nine_DebtorInPossessionFinancingNetOrderlyLiquidationValueDividedByBookValuePercentage" abstract="false" name="DebtorInPossessionFinancingNetOrderlyLiquidationValueDividedByBookValuePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nine_DebtorInPossessionFinancingBorrowingBaseEligiblePercentage" abstract="false" name="DebtorInPossessionFinancingBorrowingBaseEligiblePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nine_DebtInstrumentThresholdExcessAvailability" abstract="false" name="DebtInstrumentThresholdExcessAvailability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_DebtInstrumentExcessCashFlowPercentage" abstract="false" name="DebtInstrumentExcessCashFlowPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="nine_LineOfCreditFacilityAdditionalBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_DebtVoluntaryPaymentConditionToExcessCashFlowOfferAmount" abstract="false" name="DebtVoluntaryPaymentConditionToExcessCashFlowOfferAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_FinancingAgreementInsurancePremiumOutstanding" abstract="false" name="FinancingAgreementInsurancePremiumOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_OtherShortTermDebtMember" abstract="true" name="OtherShortTermDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_EquipmentFromRelatedPartyMember" abstract="true" name="EquipmentFromRelatedPartyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_RevenueFromRelatedPartyMember" abstract="true" name="RevenueFromRelatedPartyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_DevonEnergyCorporationMember" abstract="true" name="DevonEnergyCorporationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_CrescentEnergyMember" abstract="true" name="CrescentEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_LeaseAndBuildingMaintenanceExpense" abstract="false" name="LeaseAndBuildingMaintenanceExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_ScorpionAcquisitionMember" abstract="true" name="ScorpionAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_AccruedExpensesMember" abstract="true" name="AccruedExpensesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_FracTechAcquisitionMember" abstract="true" name="FracTechAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nine_ContingentConsiderationObligationRevaluationGainLoss" abstract="false" name="ContingentConsiderationObligationRevaluationGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_ReorganizationChapter11CancellationOfDebtIncomeFromTaxableIncome" abstract="false" name="ReorganizationChapter11CancellationOfDebtIncomeFromTaxableIncome" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="nine_IncrementalCommonSharesAttributableToDilutiveEffectOfUnvestedRestrictedStock" abstract="false" name="IncrementalCommonSharesAttributableToDilutiveEffectOfUnvestedRestrictedStock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="nine_DebtToEquityExchangeRatio" abstract="false" name="DebtToEquityExchangeRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
</xs:schema>
