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COMPUTATIONALLY EFFICIENT DOWN-HOLE DRILLING SYSTEM DYNAMICS MODELING INTEGRATING FINITE ELEMENT AND TRANSFER MATRIX

[+] Author and Article Information
Chong Ke

Department of Mechanical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
mkxxz314@tamu.edu

Xingyong Song

Department of Engineering Technology and Industrial Distribution, Department of Mechanical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
songxy@tamu.edu

1Corresponding author.

ASME doi:10.1115/1.4037165 History: Received June 07, 2016; Revised June 16, 2017

Abstract

This paper proposes a novel computationally efficient dynamics modeling approach for downhole well drilling system. The existing drilling modeling methods are either computationally intensive such as those using finite element method (FEM), or weak in fidelity for complex geometry such as those using transfer matrix method (TMM). To take advantage of the benefits of FEM and TMM and avoid their drawbacks, this paper presents a new hybrid method integrating both of the aforementioned modeling approaches, enabled by the unique structural geometry of the drilling system. The new method is then applied to the downhole well drilling system modeling, incorporating the dynamics of top drive, drill string, bottom-hole-assembly (BHA) and bit-rock interaction. To this end, numerical simulation results are presented to demonstrate the effectiveness of the proposed hybrid modeling approach.

Copyright (c) 2017 by ASME
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