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《ENGINEERING MECHANICS》 1994-04
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LARGE DEFLECTION ANALYSIS OF DRILLSTRING IN ANNULUS USING NEWTON-RAPHSON METHOD

Liu Yanqiang;Zhou Shujing(University of Petroleum)(Coal Institute of Achitecture Engineering)  
Newton-Raphson method is used in the analysis of drillstring in annulus.Penalty function method is applied to problems with undetermined boundary.Different parameters in the same equation are described by different forms of element.The nonlinear effects of the curvature of wellbore on the lateral forces on bit are shown through the computations.
【CateGory Index】: TE921.201
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