Abstract: The critical buckling load is influenced by the pattern of bottomhole assembly directly. In this paper, an analysis method of eigenvalue buckling of bottomhole assembly is proposed based on finite element analysis, and some cases are analyzedand calculated. The computational result demonstrates the critical buckling load will increase as optimal spacing of multiple stabilizers, and the deviation control and penetration rate increasing will be realized, a theoretical basis is provided for the technology of deviation control and penetration rate increasing based on nonlinear dynamics.

Key words: bottomhole assembly, finite element analysis, ANSYS, eigenvalue buckling, preventing deviation