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  <xs:element id="pten_MeasurementInputImpliedMarketRateMember" abstract="true" name="MeasurementInputImpliedMarketRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pten_ColombianDrillingOperationsMember" abstract="true" name="ColombianDrillingOperationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pten_JamesM.HolcombMember" abstract="true" name="JamesM.HolcombMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="pten_WilliamA.HendricksMember" abstract="true" name="WilliamA.HendricksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
