半主动式柱.pdf
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2012 40 5 CHINAPETROLEUMMACHINERY — 57—
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:TE951 :A :1001-4578(2012)05-0057-04
AnalysisoftheCompensatingMechanismofSemiactiveDrill
StringHeavingCompensationSystem
ZhangMeng HuXiaodong LiBo
(CollegeofMechanical&ElectronicEngineering,ChinaUniversityofGeosciences,Wuhan)
Abstract:Applyingthed'Alembertprincipleandreferringtothemovementlawofdrillstring,theparalleland
serialdynamicmodelsofsemiactivedrillstringheavingcompensationdevicewereestablishedThecompensating
mechanismoftheparallelandserialsemiactivedrillstringheavingcompensationsystemswereanalyzedandcom
paredThefindingsshowthatthefunctionofthepassivecompensationpartinthesystemistosupportmostofthe
massofdrillstringandthatoftheactivecompensationpartistocompensatethevariationofvariousforcesThehy
draulicsystemoftheparallelstructureisquitecomplexduetothefactthattherearemoreexecutingcomponentsin
parallelstructurethaninserialstructureHowever,whenthegenerateddisplacementofthehullisremarkableand
thecompensationloadrequiredbysubseadrillingisrelativelylarge,parallelstructureisbetterthanserialstruc
tureTheparalleldrillstringheavingcompensationcanonl
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