Drillstring vibration can cause fatigue failure of the drill pipe, premature wear of the bit, and a decreased drilling efficiency; therefore, it is important to accurately model the drillstring and bottomhole assembly (BHA) dynamics for vibration suppression. The dynamic analysis of directional drilling is more important, considering its wide application and the advantage of increasing drilling and production efficiencies; however, the problem is complex because the large bending can bring nonlinearities to drillstring vibration and the interaction with the wellbore can occur along the entire drillstring. To help manage this problem, this paper discusses a dynamic finite element method (FEM) model to characterize directional drilling dynamics by linearizing the problem along the well's central axis. Additionally, the rig force and drillstring/wellbore interaction are modeled as a boundary condition to simulate realistic drilling scenarios. The proposed modeling framework is verified using comparisons with analytical solutions and literatures. The utility of the proposed model is demonstrated by analyzing the dynamics of a typical directional drillstring.
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June 2018
Research-Article
Dynamic Modeling of Directional Drillstring: A Linearized Model Considering Well Profile
Tianheng Feng,
Tianheng Feng
Department of Mechanical Engineering,
The University of Texas at Austin,
204 E. Dean Keeton Street,
Austin, TX 78712
e-mail: f.tianheng@utexas.edu
The University of Texas at Austin,
204 E. Dean Keeton Street,
Austin, TX 78712
e-mail: f.tianheng@utexas.edu
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Dongmei Chen
Dongmei Chen
Department of Mechanical Engineering,
The University of Texas at Austin,
204 E. Dean Keeton Street,
Austin, TX 78712
e-mail: dmchen@me.utexas.edu
The University of Texas at Austin,
204 E. Dean Keeton Street,
Austin, TX 78712
e-mail: dmchen@me.utexas.edu
Search for other works by this author on:
Tianheng Feng
Department of Mechanical Engineering,
The University of Texas at Austin,
204 E. Dean Keeton Street,
Austin, TX 78712
e-mail: f.tianheng@utexas.edu
The University of Texas at Austin,
204 E. Dean Keeton Street,
Austin, TX 78712
e-mail: f.tianheng@utexas.edu
Inho Kim
Dongmei Chen
Department of Mechanical Engineering,
The University of Texas at Austin,
204 E. Dean Keeton Street,
Austin, TX 78712
e-mail: dmchen@me.utexas.edu
The University of Texas at Austin,
204 E. Dean Keeton Street,
Austin, TX 78712
e-mail: dmchen@me.utexas.edu
1Corresponding author.
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received August 8, 2017; final manuscript received October 31, 2017; published online December 19, 2017. Assoc. Editor: Shankar Coimbatore Subramanian.
J. Dyn. Sys., Meas., Control. Jun 2018, 140(6): 061005 (10 pages)
Published Online: December 19, 2017
Article history
Received:
August 8, 2017
Revised:
October 31, 2017
Citation
Feng, T., Kim, I., and Chen, D. (December 19, 2017). "Dynamic Modeling of Directional Drillstring: A Linearized Model Considering Well Profile." ASME. J. Dyn. Sys., Meas., Control. June 2018; 140(6): 061005. https://doi.org/10.1115/1.4038388
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