A mechanical model of bottomholeassembly (BHA) with eccentric bits is established and the solution of this model was given by means of numerical method.
采用静力分析的方法，建立了偏心钻头底部钻具组合的力学模型，并完成了对力学模型的求解。
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It still is a difficult subject for most drilling engineers to predict and control well path by applying the mechanical analysis of bottomholeassembly and the rock-bit interaction model.
The force and deformation of bottomholeassembly (BHA)are calculated by the gap-element method, in consideration for the bending effect and contact state of BHA.