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Finite Element Modeling of Bottom Hole Assembly Stress-strain State

Dmitri O. Zaharov and Alexander P. Sokolov
Bauman Moscow State Technical University, Moscow, Russia

Abstract—The results of the numerical solution of the problem of static loading of the bottom-hole assembly (BHA) by axial load are given, taking into account the contact interaction with the borehole wall. The numerical solution of the presented problem is important in the process of preparing for drilling various types of wells. The finite element method is used as the main computational research method. A finite element model of a special type, designed to simulate the contact interaction of a drill string with a borehole wall, is presented. A computational algorithm for numerical simulation of nonlinear deformation of a drillstring based on the use of linear beams and nonlinear rod finite elements is proposed. The developed algorithm allowed the calculation of the forces acting on the bit, as well as the calculation of the drillstring displacements inside the wellbore in a two-dimensional formulation. The results of computational experiments are presented.

Index Terms—Bottom hole assembly, weight on bit, side force coefficient, bottom hole assembly side force determination, finite element

Cite: Dmitri O. Zaharov and Alexander P. Sokolov, "Finite Element Modeling of Bottom Hole Assembly Stress-strain State," International Journal of Mechanical Engineering and Robotics Research, Vol. 9, No. 6, pp. 803-807, June 2020. DOI: 10.18178/ijmerr.9.6.803-807

Copyright © 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.