海洋石油钻井单筒双井表层套管下入挂碰模拟研究

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Abstract：Thetinhole-n-monoboreelltechnologyforofshoreoildrillngisanadvanceddrllingtechniquethatsharessingle conductor.However，uringtesufacecsingngprocessintwinole-nmonobrewels，coliaduingesistaebtw thetwocasingfrquentlycursouslyetingdillingenyBsedontedifrenalquationoforeholetrajectydte Frenetmovingframe，thispaperpreciselycharacterizedtherelativepositionalrelationshipoftheresistancesectionandestablisheda calculationmodelfortheinitialcontactpositionandcotactlengthofthesurfacecasing.Meanwhile，thecontactpostionrelatioship andtherunningmechanicalbehaviorof tecasingstringintheobliqueverticalsectionandtheinclinedsectionweredeplyanalyzed， andaflexuraldeformationmodelofthecasingstringduringrunningwasestablished.Themodelwasverfiedbasedonthemeasureddata ofCH6-H1andCH6-H2well，demonstratinggoodaccuracy.Furthermore，aumericalanalysismodelforcasingruningresistance was establishedusing ABAQUS finite elementsoftware，revealingtheinfluence characteristicsofconductordeviation，anulusgap， couplinghamfering，conductordameterstructureandsingleconductorlengthocolisionbehaviorduringcasinguing.Tisfored asetofmethdsforaalyingtheinfuencepatesofollsionanduingresistancofsufacecasingintwinoleinmoobreells. Finaly，preventivemeasuesagainstsurfacecasingcollsionereproposedfromthreeaspects：preventingconductordeviationand maintainingstraightness，optimizingtheconductor’sinnerdiameterstructure，andadjustingthecouplingchamfer.Thesefindings provide a beneficial reference for the construction of the same type of well groups.

Keywords：twinhole-in-monobore well; casing running;flexural deflection; collsion; numerical simulation

海洋石油钻井在单筒双井表层套管下入过程中，时常出现两井套管相互挂碰遇阻问题，并且现阶段表层套管挂碰遇阻机理不明、影响因素作用规律不清，现场仅能依靠经验采取有限的防挂碰措施。（剩余8350字）