<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2023 Workiva-->
<!--r:2699e8b1-ec37-4ff5-baff-8ed9b6d0c7a5,g:7a006d9f-5733-407a-a17a-1c54ea3158b0-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:ftk="http://flotekind.com/20230930" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types1="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://flotekind.com/20230930">
  <xs:import namespace="http://fasb.org/srt/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2023" schemaLocation="https://xbrl.sec.gov/country/2023/country-2023.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2023" schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ftk-20230930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ftk-20230930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ftk-20230930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="ftk-20230930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://flotekind.com/role/CoverPage">
        <link:definition>0000001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="UNAUDITEDCONDENSEDCONSOLIDATEDBALANCESHEETS" roleURI="http://flotekind.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDBALANCESHEETS">
        <link:definition>0000002 - Statement - UNAUDITED CONDENSED CONSOLIDATED 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 id="UNAUDITEDCONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" roleURI="http://flotekind.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>0000003 - Statement - UNAUDITED CONDENSED CONSOLIDATED 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 id="UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" roleURI="http://flotekind.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS">
        <link:definition>0000004 - Statement - UNAUDITED CONDENSED CONSOLIDATED 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 id="CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS" roleURI="http://flotekind.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS">
        <link:definition>0000005 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://flotekind.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>0000006 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS 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 id="UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" roleURI="http://flotekind.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY">
        <link:definition>0000007 - Statement - UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS&#8217; 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 id="OrganizationandNatureofOperations" roleURI="http://flotekind.com/role/OrganizationandNatureofOperations">
        <link:definition>0000008 - Disclosure - Organization and Nature 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 id="SummaryofSignificantAccountingPolicies" roleURI="http://flotekind.com/role/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 id="RevenuefromContractswithCustomers" roleURI="http://flotekind.com/role/RevenuefromContractswithCustomers">
        <link:definition>0000010 - Disclosure - Revenue from Contracts with Customers</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ContractAssets" roleURI="http://flotekind.com/role/ContractAssets">
        <link:definition>0000011 - Disclosure - Contract Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Inventories" roleURI="http://flotekind.com/role/Inventories">
        <link:definition>0000012 - Disclosure - Inventories</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PropertyandEquipment" roleURI="http://flotekind.com/role/PropertyandEquipment">
        <link:definition>0000013 - Disclosure - Property and Equipment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Leases" roleURI="http://flotekind.com/role/Leases">
        <link:definition>0000014 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilities" roleURI="http://flotekind.com/role/AccruedLiabilities">
        <link:definition>0000015 - Disclosure - Accrued Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtandConvertibleNotesPayable" roleURI="http://flotekind.com/role/DebtandConvertibleNotesPayable">
        <link:definition>0000016 - Disclosure - Debt and Convertible Notes Payable</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurements" roleURI="http://flotekind.com/role/FairValueMeasurements">
        <link:definition>0000017 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://flotekind.com/role/IncomeTaxes">
        <link:definition>0000018 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://flotekind.com/role/CommitmentsandContingencies">
        <link:definition>0000019 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquity" roleURI="http://flotekind.com/role/StockholdersEquity">
        <link:definition>0000020 - Disclosure - Stockholders&#8217; 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 id="EarningsLossPerShare" roleURI="http://flotekind.com/role/EarningsLossPerShare">
        <link:definition>0000021 - Disclosure - Earnings (Loss) Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SupplementalCashFlowInformation" roleURI="http://flotekind.com/role/SupplementalCashFlowInformation">
        <link:definition>0000022 - Disclosure - Supplemental Cash Flow 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 id="RelatedPartyTransactions" roleURI="http://flotekind.com/role/RelatedPartyTransactions">
        <link:definition>0000023 - 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 id="BusinessSegmentGeographicandMajorCustomerInformation" roleURI="http://flotekind.com/role/BusinessSegmentGeographicandMajorCustomerInformation">
        <link:definition>0000024 - Disclosure - Business Segment, Geographic and Major Customer 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 id="SubsequentEvents" roleURI="http://flotekind.com/role/SubsequentEvents">
        <link:definition>0000025 - 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 id="SummaryofSignificantAccountingPoliciesPolicies" roleURI="http://flotekind.com/role/SummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>9954471 - 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 id="SummaryofSignificantAccountingPoliciesTables" roleURI="http://flotekind.com/role/SummaryofSignificantAccountingPoliciesTables">
        <link:definition>9954472 - Disclosure - Summary of Significant Accounting Policies (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 id="RevenuefromContractswithCustomersTables" roleURI="http://flotekind.com/role/RevenuefromContractswithCustomersTables">
        <link:definition>9954473 - Disclosure - Revenue from Contracts with Customers (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 id="ContractAssetsTables" roleURI="http://flotekind.com/role/ContractAssetsTables">
        <link:definition>9954474 - Disclosure - Contract Assets (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 id="InventoriesTables" roleURI="http://flotekind.com/role/InventoriesTables">
        <link:definition>9954475 - Disclosure - Inventories (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 id="PropertyandEquipmentTables" roleURI="http://flotekind.com/role/PropertyandEquipmentTables">
        <link:definition>9954476 - Disclosure - Property and Equipment (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 id="LeasesTables" roleURI="http://flotekind.com/role/LeasesTables">
        <link:definition>9954477 - Disclosure - Leases (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 id="AccruedLiabilitiesTables" roleURI="http://flotekind.com/role/AccruedLiabilitiesTables">
        <link:definition>9954478 - Disclosure - Accrued Liabilities (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 id="DebtandConvertibleNotesPayableTables" roleURI="http://flotekind.com/role/DebtandConvertibleNotesPayableTables">
        <link:definition>9954479 - Disclosure - Debt and Convertible Notes Payable (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 id="FairValueMeasurementsTables" roleURI="http://flotekind.com/role/FairValueMeasurementsTables">
        <link:definition>9954480 - Disclosure - Fair Value Measurements (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 id="IncomeTaxesTables" roleURI="http://flotekind.com/role/IncomeTaxesTables">
        <link:definition>9954481 - Disclosure - Income Taxes (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 id="StockholdersEquityTables" roleURI="http://flotekind.com/role/StockholdersEquityTables">
        <link:definition>9954482 - Disclosure - Stockholders&#8217; Equity (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 id="EarningsLossPerShareTables" roleURI="http://flotekind.com/role/EarningsLossPerShareTables">
        <link:definition>9954483 - Disclosure - Earnings (Loss) Per Share (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 id="SupplementalCashFlowInformationTables" roleURI="http://flotekind.com/role/SupplementalCashFlowInformationTables">
        <link:definition>9954484 - Disclosure - Supplemental Cash Flow Information (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 id="BusinessSegmentGeographicandMajorCustomerInformationTables" roleURI="http://flotekind.com/role/BusinessSegmentGeographicandMajorCustomerInformationTables">
        <link:definition>9954485 - Disclosure - Business Segment, Geographic and Major Customer Information (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 id="OrganizationandNatureofOperationsDetails" roleURI="http://flotekind.com/role/OrganizationandNatureofOperationsDetails">
        <link:definition>9954486 - Disclosure - Organization and Nature of Operations (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 id="SummaryofSignificantAccountingPoliciesRestrictedCashDetails" roleURI="http://flotekind.com/role/SummaryofSignificantAccountingPoliciesRestrictedCashDetails">
        <link:definition>9954487 - Disclosure - Summary of Significant Accounting Policies - Restricted Cash (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 id="SummaryofSignificantAccountingPoliciesNarrativeDetails" roleURI="http://flotekind.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails">
        <link:definition>9954488 - Disclosure - Summary of Significant Accounting Policies - Narrative (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 id="SummaryofSignificantAccountingPoliciesPropertyandEquipmentDetails" roleURI="http://flotekind.com/role/SummaryofSignificantAccountingPoliciesPropertyandEquipmentDetails">
        <link:definition>9954489 - Disclosure - Summary of Significant Accounting Policies - Property and Equipment (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 id="SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails" roleURI="http://flotekind.com/role/SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails">
        <link:definition>9954490 - Disclosure - Summary of Significant Accounting Policies - Revenue Recognition (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 id="RevenuefromContractswithCustomersDisaggregationofRevenueDetails" roleURI="http://flotekind.com/role/RevenuefromContractswithCustomersDisaggregationofRevenueDetails">
        <link:definition>9954491 - Disclosure - Revenue from Contracts with Customers - Disaggregation of Revenue (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 id="RevenuefromContractswithCustomersCostofRevenueDetails" roleURI="http://flotekind.com/role/RevenuefromContractswithCustomersCostofRevenueDetails">
        <link:definition>9954492 - Disclosure - Revenue from Contracts with Customers - Cost of Revenue (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 id="ContractAssetsContractAssetsDetails" roleURI="http://flotekind.com/role/ContractAssetsContractAssetsDetails">
        <link:definition>9954493 - Disclosure - Contract Assets - Contract Assets (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 id="ContractAssetsContractAssetsDetails_1" roleURI="http://flotekind.com/role/ContractAssetsContractAssetsDetails_1">
        <link:definition>9954493 - Disclosure - Contract Assets - Contract Assets (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 id="ContractAssetsNarrativeDetails" roleURI="http://flotekind.com/role/ContractAssetsNarrativeDetails">
        <link:definition>9954494 - Disclosure - Contract Assets - Narrative (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 id="ContractAssetsEstimatedAmortizationDetails" roleURI="http://flotekind.com/role/ContractAssetsEstimatedAmortizationDetails">
        <link:definition>9954495 - Disclosure - Contract Assets - Estimated Amortization (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 id="InventoriesComponentsofinventoryDetails" roleURI="http://flotekind.com/role/InventoriesComponentsofinventoryDetails">
        <link:definition>9954496 - Disclosure - Inventories - Components of inventory (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 id="InventoriesNarrativesDetails" roleURI="http://flotekind.com/role/InventoriesNarrativesDetails">
        <link:definition>9954497 - Disclosure - Inventories - Narratives (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 id="PropertyandEquipmentComponentsofPropertyandEquipmentDetails" roleURI="http://flotekind.com/role/PropertyandEquipmentComponentsofPropertyandEquipmentDetails">
        <link:definition>9954498 - Disclosure - Property and Equipment - Components of Property and Equipment (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 id="PropertyandEquipmentNarrativesDetails" roleURI="http://flotekind.com/role/PropertyandEquipmentNarrativesDetails">
        <link:definition>9954499 - Disclosure - Property and Equipment - Narratives (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 id="LeasesComponentsofLeaseExpenseandSupplementalCashFlowInformationDetails" roleURI="http://flotekind.com/role/LeasesComponentsofLeaseExpenseandSupplementalCashFlowInformationDetails">
        <link:definition>9954500 - Disclosure - Leases - Components of Lease Expense and Supplemental Cash Flow Information (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 id="LeasesMaturitiesofLeaseLiabilitiesDetails" roleURI="http://flotekind.com/role/LeasesMaturitiesofLeaseLiabilitiesDetails">
        <link:definition>9954501 - Disclosure - Leases - Maturities of Lease Liabilities (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 id="LeasesMaturitiesofLeaseLiabilitiesDetails_1" roleURI="http://flotekind.com/role/LeasesMaturitiesofLeaseLiabilitiesDetails_1">
        <link:definition>9954501 - Disclosure - Leases - Maturities of Lease Liabilities (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 id="LeasesSupplementalBalanceSheetInformationDetails" roleURI="http://flotekind.com/role/LeasesSupplementalBalanceSheetInformationDetails">
        <link:definition>9954502 - Disclosure - Leases - Supplemental Balance Sheet Information (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 id="LeasesFutureSubleaseRentalIncomeDetails" roleURI="http://flotekind.com/role/LeasesFutureSubleaseRentalIncomeDetails">
        <link:definition>9954503 - Disclosure - Leases -Future Sublease Rental Income (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 id="AccruedLiabilitiesScheduleofCurrentAccruedLiabilitiesDetails" roleURI="http://flotekind.com/role/AccruedLiabilitiesScheduleofCurrentAccruedLiabilitiesDetails">
        <link:definition>9954504 - Disclosure - Accrued Liabilities - Schedule of Current Accrued Liabilities (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 id="DebtandConvertibleNotesPayableNarrativesDetails" roleURI="http://flotekind.com/role/DebtandConvertibleNotesPayableNarrativesDetails">
        <link:definition>9954505 - Disclosure - Debt and Convertible Notes Payable - Narratives (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 id="DebtandConvertibleNotesPayableScheduleofDebtDetails" roleURI="http://flotekind.com/role/DebtandConvertibleNotesPayableScheduleofDebtDetails">
        <link:definition>9954506 - Disclosure - Debt and Convertible Notes Payable - Schedule of Debt (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 id="DebtandConvertibleNotesPayableScheduleofLoanRepaymentsDetails" roleURI="http://flotekind.com/role/DebtandConvertibleNotesPayableScheduleofLoanRepaymentsDetails">
        <link:definition>9954507 - Disclosure - Debt and Convertible Notes Payable - Schedule of Loan Repayments (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 id="FairValueMeasurementsRecurringDetails" roleURI="http://flotekind.com/role/FairValueMeasurementsRecurringDetails">
        <link:definition>9954508 - Disclosure - Fair Value Measurements - Recurring (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 id="FairValueMeasurementsMonteCarloSimulationDetails" roleURI="http://flotekind.com/role/FairValueMeasurementsMonteCarloSimulationDetails">
        <link:definition>9954509 - Disclosure - Fair Value Measurements - Monte Carlo Simulation (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 id="FairValueMeasurementsNarrativesDetails" roleURI="http://flotekind.com/role/FairValueMeasurementsNarrativesDetails">
        <link:definition>9954510 - Disclosure - Fair Value Measurements - Narratives (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 id="FairValueMeasurementsRollforwardDetails" roleURI="http://flotekind.com/role/FairValueMeasurementsRollforwardDetails">
        <link:definition>9954511 - Disclosure - Fair Value Measurements - Rollforward (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 id="IncomeTaxesReconciliationofEffectiveTaxRateDetails" roleURI="http://flotekind.com/role/IncomeTaxesReconciliationofEffectiveTaxRateDetails">
        <link:definition>9954512 - Disclosure - Income Taxes - Reconciliation of Effective Tax Rate (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 id="IncomeTaxesNarrativesDetails" roleURI="http://flotekind.com/role/IncomeTaxesNarrativesDetails">
        <link:definition>9954513 - Disclosure - Income Taxes - Narratives (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 id="CommitmentsandContingenciesDetails" roleURI="http://flotekind.com/role/CommitmentsandContingenciesDetails">
        <link:definition>9954514 - Disclosure - Commitments and Contingencies (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 id="StockholdersEquityNarrativeDetails" roleURI="http://flotekind.com/role/StockholdersEquityNarrativeDetails">
        <link:definition>9954515 - Disclosure - Stockholders&#8217; Equity - Narrative (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 id="StockholdersEquityValuationofAssumptionsDetails" roleURI="http://flotekind.com/role/StockholdersEquityValuationofAssumptionsDetails">
        <link:definition>9954516 - Disclosure - Stockholders&#8217; Equity - Valuation of Assumptions (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 id="EarningsLossPerShareScheduleofBasicandDilutedDetails" roleURI="http://flotekind.com/role/EarningsLossPerShareScheduleofBasicandDilutedDetails">
        <link:definition>9954517 - Disclosure - Earnings (Loss) Per Share - Schedule of Basic and Diluted (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 id="SupplementalCashFlowInformationDetails" roleURI="http://flotekind.com/role/SupplementalCashFlowInformationDetails">
        <link:definition>9954518 - Disclosure - Supplemental Cash Flow Information (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 id="RelatedPartyTransactionsDetails" roleURI="http://flotekind.com/role/RelatedPartyTransactionsDetails">
        <link:definition>9954519 - Disclosure - Related Party Transactions (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 id="BusinessSegmentGeographicandMajorCustomerInformationReportableSegmentsDetails" roleURI="http://flotekind.com/role/BusinessSegmentGeographicandMajorCustomerInformationReportableSegmentsDetails">
        <link:definition>9954520 - Disclosure - Business Segment, Geographic and Major Customer Information - Reportable Segments (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 id="BusinessSegmentGeographicandMajorCustomerInformationAssetsbyReportableSegmentsDetails" roleURI="http://flotekind.com/role/BusinessSegmentGeographicandMajorCustomerInformationAssetsbyReportableSegmentsDetails">
        <link:definition>9954521 - Disclosure - Business Segment, Geographic and Major Customer Information - Assets by Reportable Segments (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 id="BusinessSegmentGeographicandMajorCustomerInformationGeographicInformationDetails" roleURI="http://flotekind.com/role/BusinessSegmentGeographicandMajorCustomerInformationGeographicInformationDetails">
        <link:definition>9954522 - Disclosure - Business Segment, Geographic and Major Customer Information - Geographic Information (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 id="BusinessSegmentGeographicandMajorCustomerInformationMajorCustomersDetails" roleURI="http://flotekind.com/role/BusinessSegmentGeographicandMajorCustomerInformationMajorCustomersDetails">
        <link:definition>9954523 - Disclosure - Business Segment, Geographic and Major Customer Information - Major Customers (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 id="BusinessSegmentGeographicandMajorCustomerandSupplierInformationMajorSuppliersDetails" roleURI="http://flotekind.com/role/BusinessSegmentGeographicandMajorCustomerandSupplierInformationMajorSuppliersDetails">
        <link:definition>9954524 - Disclosure - Business Segment, Geographic and Major Customer and Supplier Information - Major Suppliers (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="ftk_EffectiveIncomeTaxRateReconciliationPermanentDifferences" abstract="false" name="EffectiveIncomeTaxRateReconciliationPermanentDifferences" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <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_EarnOutProvisionMeasurementInput" abstract="false" name="EarnOutProvisionMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <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_SupplierCMember" abstract="true" name="SupplierCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_FairValueMeasurementWithUnobservableInputsReconciliationConversionToConvertibleNotesPayableOnMaturity" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationConversionToConvertibleNotesPayableOnMaturity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_FinanceLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="FinanceLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" 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_LineOfCreditFacilityBorrowingBasePercentageValueOfEligibleInventory" abstract="false" name="LineOfCreditFacilityBorrowingBasePercentageValueOfEligibleInventory" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <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_ReverseStockSplitMember" abstract="true" name="ReverseStockSplitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_LessorOperatingLeasePaymentsToBeReceivedAfterYearFour" abstract="false" name="LessorOperatingLeasePaymentsToBeReceivedAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_LeasesWeightedAverageDiscountRateAbstract" abstract="true" name="LeasesWeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <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_ConfluenceMember" abstract="true" name="ConfluenceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_OrganizationAndNatureOfOperationsLineItems" abstract="true" name="OrganizationAndNatureOfOperationsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <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_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearFiveAndThereafter" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearFiveAndThereafter" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_LineOfCreditFacilityBorrowingCapacityIncreaseAmount" abstract="false" name="LineOfCreditFacilityBorrowingCapacityIncreaseAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" 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_DenominatorAbstract" abstract="true" name="DenominatorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <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_SupplierAMember" abstract="true" name="SupplierAMember" 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_ContractAxis" abstract="true" name="ContractAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <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_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearTwo" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <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_ContractPhaseDomain" abstract="true" name="ContractPhaseDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_FinanceLeasePrincipalPaymentsNetOfPrepayments" abstract="false" name="FinanceLeasePrincipalPaymentsNetOfPrepayments" 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_ConditionalRevenueShortfallRateIfChemicalRequirementRateIsUnmet" abstract="false" name="ConditionalRevenueShortfallRateIfChemicalRequirementRateIsUnmet" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="ftk_AssetsMeasuredAtFairValueOnANonrecurringBasisLineItems" abstract="true" name="AssetsMeasuredAtFairValueOnANonrecurringBasisLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_StockIssuedDuringPeriodSharesRestrictedStockAwardVested" abstract="false" name="StockIssuedDuringPeriodSharesRestrictedStockAwardVested" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <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_ForfeitedStockOptionsPurchased" abstract="false" name="ForfeitedStockOptionsPurchased" 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_PaymentForForfeitedStockOptions" abstract="false" name="PaymentForForfeitedStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" 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_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationRemainderOfFiscalYear" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationRemainderOfFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_ContractAssetsPolicyPolicyTextBlock" abstract="false" name="ContractAssetsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <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_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_OperatingLossCarryforwardsInterestLimitationCarryforward" abstract="false" name="OperatingLossCarryforwardsInterestLimitationCarryforward" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" 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_GainLossOnExtinguishmentOfDebtAccruedInterest" abstract="false" name="GainLossOnExtinguishmentOfDebtAccruedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_FinanceLeaseExpenseAbstract" abstract="true" name="FinanceLeaseExpenseAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <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_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract" abstract="true" name="FinanceLeaseAssetsAndLiabilitiesLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_PotentialIncreaseToContractTerm" abstract="false" name="PotentialIncreaseToContractTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <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_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearThree" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_LeaseExpense" abstract="false" name="LeaseExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" 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_PreviousCEOMember" abstract="true" name="PreviousCEOMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_PaidInKindInterestOnContractConsiderationConvertibleNotesPayable" abstract="false" name="PaidInKindInterestOnContractConsiderationConvertibleNotesPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_BuildingAndLeaseholdMemberMember" abstract="true" name="BuildingAndLeaseholdMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_NumberOfConsecutiveDays" abstract="false" name="NumberOfConsecutiveDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ftk_ContingentPortionOfConvertibleDebtMember" abstract="true" name="ContingentPortionOfConvertibleDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" 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_DebtInstrumentRealizedGainLossOnFairValueAdjustmentBeforeTax" abstract="false" name="DebtInstrumentRealizedGainLossOnFairValueAdjustmentBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_WarrantExerciseFee" abstract="false" name="WarrantExerciseFee" 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-types:domainItemType"/>
  <xs:element id="ftk_DebtInstrumentTerminationFeeContingencyPeriod" abstract="false" name="DebtInstrumentTerminationFeeContingencyPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ftk_PeriodOneMember" abstract="true" name="PeriodOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_CustomerMember" abstract="true" name="CustomerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_LineOfCreditFacilityBorrowingCapacityPotentialIncreasePercentage" abstract="false" name="LineOfCreditFacilityBorrowingCapacityPotentialIncreasePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <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_PaycheckProtectionProgramCARESActMember" abstract="true" name="PaycheckProtectionProgramCARESActMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract" abstract="true" name="OperatingLeaseAssetsAndLiabilitiesLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" 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_StockWarrantPolicyPolicyTextBlock" abstract="false" name="StockWarrantPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <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_WarrantsAndRightsOutstandingExerciseFee" abstract="false" name="WarrantsAndRightsOutstandingExerciseFee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_StockIssuedDuringPeriodSharesExerciseOfPreFundedWarrants" abstract="false" name="StockIssuedDuringPeriodSharesExerciseOfPreFundedWarrants" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <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_ContractWithCustomerAssetAmortizationOfContractIntoRevenue" abstract="false" name="ContractWithCustomerAssetAmortizationOfContractIntoRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ftk_LineOfCreditFacilityAdditionalBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAdditionalBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_ContractPhaseAxis" abstract="true" name="ContractPhaseAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <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_OperatingLeasePaymentsAbstract" abstract="true" name="OperatingLeasePaymentsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" 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_PeriodAxis" abstract="true" name="PeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <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_InternationalMember" abstract="true" name="InternationalMember" 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_June2022WarrantsMember" abstract="true" name="June2022WarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ftk_ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearFour" abstract="false" name="ContractWithCustomerAssetAfterAllowanceForCreditLossExpectedAmortizationYearFour" 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_ChangeInFairValueContingentConsideration" abstract="false" name="ChangeInFairValueContingentConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_ContractDomain" abstract="true" name="ContractDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <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_NumeratorBasicAndDilutedAbstract" abstract="true" name="NumeratorBasicAndDilutedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ftk_OrganizationAndNatureOfOperationsTable" abstract="true" name="OrganizationAndNatureOfOperationsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <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_DebtConversionConvertedInstrumentInitialContractConsideration" abstract="false" name="DebtConversionConvertedInstrumentInitialContractConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_AssetBasedLoanMember" abstract="true" name="AssetBasedLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ftk_ContractAssetsAmortizationTerm" abstract="false" name="ContractAssetsAmortizationTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <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_DebtConversionConvertedInstrumentAccruedInterest" abstract="false" name="DebtConversionConvertedInstrumentAccruedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
