【7A文】Casing Drilling with Retrievable Drilling Assemblies（套管钻井）.ppt

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1、CasingDrillingwithRetrievableDrillingAssembliesOTC2004May3-6,2004T.M.Warren,R.M.Tessari,B.Houtchens-TescoCorp.OverviewofTalkCasingDrillingsystemExampleApplicationsLobo(85wells)Stratton(15wells)Wheretonext?DirectionalDrillingCasingRunningCasingDrillingtmisatradename

2、ofTescoCorp.WhatisCASINGDRILLINGtm?“Processtosimultaneouslydrillandcasewellsbyusingthecasingasthedrillstring.”Casingisrotatedtodrill.Casingisnearbottomatalltimes.Casingcementedinthewellwithouttrippingitout.TwoTypesRetrievable&re-runableBHA“Bit”attachedtocasingCasin

3、gDrillingJustificationLostcirculationStuckPipeKickSloughingShaleOther24%oftimefromspudtoTD(Jan2004Offshoremagazine)FasterprocessReducestroubletimeIncreasedreservesMorewellsBetterproductionrateIntegratedrigsolutionHandlingtheCasingInterfacetotopdriveProtectthreadsFa

4、stconnectionsSafepipehandlingCasingDriveSystemConnectionsforAdequateTorqueButtresswithMLTringPremiumCasingDrillingconnectionsMustbalancefatigue,torquerating&costMLTRingCasingcouplingWearBandCasingProtectionCrimpingareaTChardfacingInstallationToolRetrievableDrilling

5、AssemblyTopofassemblylockedinprofilenipple.Drillingassemblyextendsbelowcasingshoe.Capableofmultipleruns.Normallyretrievedwith9/16”braidedcable.Mustbereliable.ProfileNippleStabilizerCasingShoeUnderreamerBitDLATescoCasingDrillingExperienceDrilled31,000ftintestwellsDr

6、illed130+commercialwells4-1/2”–13/3/8”casing700,000ftwithretrievableBHA300,000ftwithnon-retrievableBHA300+stringofcasingdrilled9stringsdrilleddirectionallyCommercialfootholdestablishedAfter85WellsatLoboSignificantlearningcurveLearneddrillingtechniquesDevelopedcasin

7、gaccessoriesImprovedequipmentreliabilityBuiltthreerigs&trainedcrewsBenefitsdefinedMinimizedlostcirculationHighwellcontroltoleranceAbilitytosavewellunderadverseconditionsFasterin-fieldmovesFielddrillingcostreducedImprovedholequality.ReducedcasingstringsControlsLostC

8、irculation200-300sackbalancedcementplug7”Csg.10days8,103’CasingDrilled95/8”Csg.41/2”Csg.51/2”Liner5,145’7”Csg.9,400’Offset295/8”Csg.31/2”Csg.19da