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  <xs:element id="ftk_WarrantsAndRightsOutstandingExerciseFee" abstract="false" name="WarrantsAndRightsOutstandingExerciseFee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityIssuanceOfContractConsiderationConvertibleNotesPayable" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationLiabilityIssuanceOfContractConsiderationConvertibleNotesPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_DebtInstrumentRealizedGainLossOnFairValueAdjustmentBeforeTax" abstract="false" name="DebtInstrumentRealizedGainLossOnFairValueAdjustmentBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_NumeratorBasicAndDilutedAbstract" abstract="true" name="NumeratorBasicAndDilutedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_DebtIssuanceCostExpensed" abstract="false" name="DebtIssuanceCostExpensed" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_EarnOutProvisionMeasurementInput" abstract="false" name="EarnOutProvisionMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="ftk_OrganizationAndNatureOfOperationsTable" abstract="true" name="OrganizationAndNatureOfOperationsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ftk_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearOne" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_PreviousCEOMember" abstract="true" name="PreviousCEOMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_PeriodAxis" abstract="true" name="PeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ftk_DebtInstrumentTerminationFeeContingencyPeriod" abstract="false" name="DebtInstrumentTerminationFeeContingencyPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ftk_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_A2019PlanMember" abstract="true" name="A2019PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_DeferredTaxAssetsGoodwill" abstract="false" name="DeferredTaxAssetsGoodwill" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ChangeInFairValueContingentConsideration" abstract="false" name="ChangeInFairValueContingentConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_FairValueMeasurementWithUnobservableInputsReconciliationConversionToConvertibleNotesPayableOnMaturity" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationConversionToConvertibleNotesPayableOnMaturity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_OtherConvertibleDebtMember" abstract="true" name="OtherConvertibleDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_LineOfCreditFacilityCovenantAmountMinimumTangibleNetWorth" abstract="false" name="LineOfCreditFacilityCovenantAmountMinimumTangibleNetWorth" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ForfeitedStockOptionsPurchased" abstract="false" name="ForfeitedStockOptionsPurchased" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearFiveAndThereafter" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearFiveAndThereafter" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_DeferredTaxAssetsCumulativeTaxCreditCarryforwards" abstract="false" name="DeferredTaxAssetsCumulativeTaxCreditCarryforwards" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_IncreaseInNumberOfActiveHydraulicFleets" abstract="false" name="IncreaseInNumberOfActiveHydraulicFleets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ftk_OperatingLossCarryforwardsLimitationsOnUseAmount" abstract="false" name="OperatingLossCarryforwardsLimitationsOnUseAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearThree" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_LineOfCreditFacilityBorrowingBasePercentageValueOfEligibleInventory" abstract="false" name="LineOfCreditFacilityBorrowingBasePercentageValueOfEligibleInventory" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ftk_DebtIssuedAsConsiderationFaceAmount" abstract="false" name="DebtIssuedAsConsiderationFaceAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_AntidilutiveIncomeLossExcludedFromComputationOfEarningsPerShareDilutedAmount" abstract="false" name="AntidilutiveIncomeLossExcludedFromComputationOfEarningsPerShareDilutedAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_AssetsMeasuredatFairValueonaNonrecurringBasisTable" abstract="true" name="AssetsMeasuredatFairValueonaNonrecurringBasisTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ftk_AdjustmentsToAdditionalPaidInCapitalEquityContribution" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalEquityContribution" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_PotentialIncreaseToContractTerm" abstract="false" name="PotentialIncreaseToContractTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ftk_RestrictedStockPerformanceBasedMember" abstract="true" name="RestrictedStockPerformanceBasedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_DebtInstrumentRealizedGainLossOnFairValueAdjustmentNetOfTax" abstract="false" name="DebtInstrumentRealizedGainLossOnFairValueAdjustmentNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ftk_OperatingLossCarryforwardsInterestLimitationCarryforwardSection163" abstract="false" name="OperatingLossCarryforwardsInterestLimitationCarryforwardSection163" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_InventoryValuationReservesChargedToProvisions" abstract="false" name="InventoryValuationReservesChargedToProvisions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ContractDomain" abstract="true" name="ContractDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearTwo" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_EquityIssuanceCosts" abstract="false" name="EquityIssuanceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ComputerEquipmentandSoftwareMember" abstract="true" name="ComputerEquipmentandSoftwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_PaidInKindInterestOnConvertibleNotesPayable" abstract="false" name="PaidInKindInterestOnConvertibleNotesPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ProFracServicesLLCMember" abstract="true" name="ProFracServicesLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_DeferredTaxAssetsTaxDeferredExpenseInterestLimitation" abstract="false" name="DeferredTaxAssetsTaxDeferredExpenseInterestLimitation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_FormerCEOCaseMember" abstract="true" name="FormerCEOCaseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_AssetBasedLoanMember" abstract="true" name="AssetBasedLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_ScheduleOfInventoryValuationReserveChangesTableTextBlock" abstract="false" name="ScheduleOfInventoryValuationReserveChangesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ftk_PaymentOfIssuanceCostsOfConvertibleNotes" abstract="false" name="PaymentOfIssuanceCostsOfConvertibleNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_OptionsAndRSUMember" abstract="true" name="OptionsAndRSUMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_DebtInstrumentConvertibleStockPriceTriggerForTradingPeriod" abstract="false" name="DebtInstrumentConvertibleStockPriceTriggerForTradingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ftk_ProFracAgreementMember" abstract="true" name="ProFracAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_OptionsAwardedInDecember52023Member" abstract="true" name="OptionsAwardedInDecember52023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_StockBasedCompensationExpenseAdjustmentForForfeitures" abstract="false" name="StockBasedCompensationExpenseAdjustmentForForfeitures" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_AssetPurchaseCommitmentPercentageOfFleet" abstract="false" name="AssetPurchaseCommitmentPercentageOfFleet" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ftk_OrganizationAndNatureOfOperationsLineItems" abstract="true" name="OrganizationAndNatureOfOperationsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_DataAnalyticsSegmentMember" abstract="true" name="DataAnalyticsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_PeriodOneMember" abstract="true" name="PeriodOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_AssetsMeasuredAtFairValueOnANonrecurringBasisLineItems" abstract="true" name="AssetsMeasuredAtFairValueOnANonrecurringBasisLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_NoncashLeaseExpense" abstract="false" name="NoncashLeaseExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearFive" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_SupplierAMember" abstract="true" name="SupplierAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_BuildingsAndLeaseholdImprovementsMember" abstract="true" name="BuildingsAndLeaseholdImprovementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_LineOfCreditFacilityEarlyTerminationFee" abstract="false" name="LineOfCreditFacilityEarlyTerminationFee" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ftk_FairValueMeasurementWithUnobservableInputsReconciliationLiabilityAdjustmentsToPrincipleAmountOfDebt" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationLiabilityAdjustmentsToPrincipleAmountOfDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpiredInPeriodWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpiredInPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ftk_PIPETransactionMember" abstract="true" name="PIPETransactionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_DebtConversionConvertedInstrumentInitialContractConsideration" abstract="false" name="DebtConversionConvertedInstrumentInitialContractConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_SupplierBMember" abstract="true" name="SupplierBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonVestedOptionsExpiredNumberOfShares" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonVestedOptionsExpiredNumberOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ftk_AdjustmentsToAdditionalPaidInCapitalEquityContributionsForConvertibleDebt" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalEquityContributionsForConvertibleDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_StockWarrantPolicyPolicyTextBlock" abstract="false" name="StockWarrantPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ftk_PrefundedWarrantsMember" abstract="true" name="PrefundedWarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_LeasesWeightedAverageDiscountRateAbstract" abstract="true" name="LeasesWeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_EffectiveIncomeTaxRateReconciliationPermanentDifferencesRelatedToCARESAct" abstract="false" name="EffectiveIncomeTaxRateReconciliationPermanentDifferencesRelatedToCARESAct" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ftk_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_DeferredTaxAssetsLeaseLiability" abstract="false" name="DeferredTaxAssetsLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_GainLossOnExtinguishmentOfDebtAccruedInterest" abstract="false" name="GainLossOnExtinguishmentOfDebtAccruedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_OptionsAwardedInJune72023Member" abstract="true" name="OptionsAwardedInJune72023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_WarrantPremiumOnAveragePricePercent" abstract="false" name="WarrantPremiumOnAveragePricePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ftk_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract" abstract="true" name="OperatingLeaseAssetsAndLiabilitiesLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_LineOfCreditFacilityBorrowingBasePercentageOfEligibleAccountsReceivable" abstract="false" name="LineOfCreditFacilityBorrowingBasePercentageOfEligibleAccountsReceivable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ftk_FinanceLeaseExpenseAbstract" abstract="true" name="FinanceLeaseExpenseAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_PerformanceBasedStockOptionsMember" abstract="true" name="PerformanceBasedStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_DefinedContributionPlanMatchingContributionsDomain" abstract="true" name="DefinedContributionPlanMatchingContributionsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ftk_ContractServiceFeeMember" abstract="true" name="ContractServiceFeeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_EmployeeStockPurchasePlanESPPSharesPurchasedTotalFairValue" abstract="false" name="EmployeeStockPurchasePlanESPPSharesPurchasedTotalFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_FinancingLeaseCost" abstract="false" name="FinancingLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_WeightedAverageRemainingLeaseTermAbstract" abstract="true" name="WeightedAverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_TransferFromFixedAssetsToInventory" abstract="false" name="TransferFromFixedAssetsToInventory" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_GainLossOnExtinguishmentOfDebtPrincipal" abstract="false" name="GainLossOnExtinguishmentOfDebtPrincipal" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_InventoryValuationReservesRollForwardAbstract" abstract="true" name="InventoryValuationReservesRollForwardAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_PaycheckProtectionProgramCARESActMember" abstract="true" name="PaycheckProtectionProgramCARESActMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_EarnOutConsiderationFromBusinessCombinationMember" abstract="true" name="EarnOutConsiderationFromBusinessCombinationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_PaymentForForfeitedStockOptions" abstract="false" name="PaymentForForfeitedStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_PeriodTwoMember" abstract="true" name="PeriodTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_AmendedProFracAgreementMember" abstract="true" name="AmendedProFracAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_InventoryValuationReservesDeductionsForSalesAndDisposals" abstract="false" name="InventoryValuationReservesDeductionsForSalesAndDisposals" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonVestedOptionsExpiredWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonVestedOptionsExpiredWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ftk_ProFracAgreementContractMember" abstract="true" name="ProFracAgreementContractMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ReverseStockSplitMember" abstract="true" name="ReverseStockSplitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_ConditionalRevenueShortfallRateIfChemicalRequirementRateIsUnmet" abstract="false" name="ConditionalRevenueShortfallRateIfChemicalRequirementRateIsUnmet" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ftk_StockIssuedDuringPeriodValueRestrictedStockAwardVested" abstract="false" name="StockIssuedDuringPeriodValueRestrictedStockAwardVested" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_DeferredTaxAssetsIntangibleAssets" abstract="false" name="DeferredTaxAssetsIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_AmortizationOfAssetBasedLoanOriginationCosts" abstract="false" name="AmortizationOfAssetBasedLoanOriginationCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_MarketBasedStockOptionsMember" abstract="true" name="MarketBasedStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ProFracHoldingsLLCMember" abstract="true" name="ProFracHoldingsLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_OperatingLossCarryforwardsMaximumUpliftAmount" abstract="false" name="OperatingLossCarryforwardsMaximumUpliftAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ScheduleOfExpenditureWithMajorSuppliersByReportingSegmentsTableTextBlock" abstract="false" name="ScheduleOfExpenditureWithMajorSuppliersByReportingSegmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ftk_OperatingLeasePaymentsAbstract" abstract="true" name="OperatingLeasePaymentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_StockIssuedDuringPeriodSharesExerciseOfPreFundedWarrants" abstract="false" name="StockIssuedDuringPeriodSharesExerciseOfPreFundedWarrants" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ftk_A2018PlanMember" abstract="true" name="A2018PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_PercentageOfIndefiniteCarryforwardThatCanOffsetTaxableIncome" abstract="false" name="PercentageOfIndefiniteCarryforwardThatCanOffsetTaxableIncome" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ftk_June2022WarrantsMember" abstract="true" name="June2022WarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ftk_ContractWithCustomerAssetAmortizationOfContractIntoRevenue" abstract="false" name="ContractWithCustomerAssetAmortizationOfContractIntoRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ProvisionForExcessAndObsoleteInventory" abstract="false" name="ProvisionForExcessAndObsoleteInventory" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_DenominatorAbstract" abstract="true" name="DenominatorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_PaidInKindInterestOnContractConsiderationConvertibleNotesPayable" abstract="false" name="PaidInKindInterestOnContractConsiderationConvertibleNotesPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_February2023WarrantsMember" abstract="true" name="February2023WarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_AccruedLiabilitiesSeveranceCostsCurrent" abstract="false" name="AccruedLiabilitiesSeveranceCostsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract" abstract="true" name="FinanceLeaseAssetsAndLiabilitiesLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_FairValueAdjustmentMember" abstract="true" name="FairValueAdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_ConfluenceMember" abstract="true" name="ConfluenceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_PaymentsToAcquirePropertyPlantAndEquipmentExcludingCapitalizedCost" abstract="false" name="PaymentsToAcquirePropertyPlantAndEquipmentExcludingCapitalizedCost" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_DeferredTaxLiabilitiesContractAsset" abstract="false" name="DeferredTaxLiabilitiesContractAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_InternationalMember" abstract="true" name="InternationalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_DebtInstrumentUnusedBorrowingCapacityFeePercentage" abstract="false" name="DebtInstrumentUnusedBorrowingCapacityFeePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ftk_DebtInstrumentDecreaseAccruedInterestForgiven" abstract="false" name="DebtInstrumentDecreaseAccruedInterestForgiven" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ContractAssetsAmortizationTerm" abstract="false" name="ContractAssetsAmortizationTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ftk_ShareBasedPaymentArrangementSharesWithheldForTaxWithholdingObligationValue" abstract="false" name="ShareBasedPaymentArrangementSharesWithheldForTaxWithholdingObligationValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_FinanceLeasePrincipalPaymentsNetOfPrepayments" abstract="false" name="FinanceLeasePrincipalPaymentsNetOfPrepayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_DefinedContributionPlanMatchingRangeUpTo2PercentMember" abstract="true" name="DefinedContributionPlanMatchingRangeUpTo2PercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ShareBasedCompensationArrangementByShareBasedPaymentAwardOfferingPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOfferingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ftk_PeriodDomain" abstract="true" name="PeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_PercentageOfNetOperatingLossCarryforwardThatCanOffsetTaxableIncome" abstract="false" name="PercentageOfNetOperatingLossCarryforwardThatCanOffsetTaxableIncome" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ftk_A2020PlanMember" abstract="true" name="A2020PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ChemistryTechnologiesSegmentMember" abstract="true" name="ChemistryTechnologiesSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_SupplierCMember" abstract="true" name="SupplierCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
