利用水力加壓原理解決水平井鉆井拖壓?jiǎn)栴}的研究.pdf

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3、ty：Name：studyonSolutionofBackingPressureUsingHydraulicForcingPrincipleOil&GasWellEngineeringCaoZhi(Signatu舊[逝2紐。Instructor：LiQi(SignatureABSTRACTwhileDrillingHorizontalWellbyWiththegreatincreaseofproductiondifficultyinoi

4、lgasfields，thehorizontaldrillingtechnologyisappliedmoreandmorewidelyHoweverthespecialwellboretrajectoryofhorizontalwellresultsintheweightonbitofhorizontalsectionisdifficulttobeappliedwhichiscalledbackingpressureItserious

5、lyaffectsthedrillingtime—efficiencyanddrillingsafetyTherefore，howtoputweightonbitisthekeytosolvebackingpressureTwokindsofdownholehydraulictransmissiontoolswereproposedathomeandabroadtosolvebackingpressureTheyaleslidingfo

6、rcingandrotaryforcingrespectivelyTheformercategoryincludescoiledmbinganti—frictiondeviceandhydraulicthruster，andthelatterishydraulicimpactorCuttingsbedCanformeasilyinlowsideofhorizontalsectionusingslidingforcing，whilethe

7、structuraldesignofrotaryhydraulicimpactoriscomplexanditsapplicationcostishighBasedonpreviousresearch，thispapercombinestheadvantagesoftwokindsofdownholehydraulictransmissiontoolsslidingforcingandrotaryforcing，thispaperdes

8、ignsanewtypeofrotaryCZtypehydraulicthrusterandbasedonthecorrelationtheoryofmechanicalengineering，hydraulicsandvibrationalscienceItconsistsofmultistagepressurecylinderinseries，anditsexteriorhasrotatingballsandspringisinst

9、alledinlaststagepistoncylinderIntheprocessofwork，thetoolnotonlyhelpshorizontalsectioncuttingsrisesmoothlyintheformofrotation，butalsoabsorbsvibrationeffectthroughspringandreturnpistonthusdecreasingdrillstringvibrationandg

10、uaranteeingstationarityofputtingweightonbitFinally，thepaperresearchesonthevibrationabsorptiontheoryofCZtypehydraulicthrustertodrillandgivesrelationalexpressionbetweenCZtypehydraulicthrusteranddrillvibrationandthensolvesi

11、tbasedonthethreedifferentlevelsCZhydraulicthrusterAtthesametime，thelongitudinalvibrationofpistonandthemovementruleofpistonrodarestudiedThecalculationsresultsshowthatCZtypehydraulicthrusterCanincreaseexceed10％WOB，whichimp