A numerical solution is suggested for the problem of drillstring buckling under the action of compressive load, torque and drillstring rotation in a hole of an arbitrary axial line. This problem is of great practical importance when assessing the pass ability and wear of drillstring. The developed 3D dynamic model of drillstring-in-hole and numerical solution of the problem provide a means to analyze stress-deformed state of the drillstring in contact with the wellbore. The model of normal contact force is based on nonlinear dependence of the contact force on the depth of interpenetration of bodies. The tangential contact is described using a model of modified Coulomb friction. The model of transition of sliding friction to rolling friction is suggested to take account of the effect of drillstring planetary motion. The set of partial differential equations is solved numerically based on the method of lines. A number of examples are presented to analyze the drillstring motion under the action of compressive load, torque and angular velocity, and other parameters.
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ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
July 7–9, 2008
Haifa, Israel
Conference Sponsors:
- International
ISBN:
978-0-7918-4836-4
PROCEEDINGS PAPER
Numerical Simulation of the Drillstring-in-Hole Dynamics at Rotary Drilling Available to Purchase
Vadim S. Tikhonov,
Vadim S. Tikhonov
Aquatic Co., Moscow, Russia
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Alexander I. Safronov
Alexander I. Safronov
Aquatic Co., Moscow, Russia
Search for other works by this author on:
Vadim S. Tikhonov
Aquatic Co., Moscow, Russia
Alexander I. Safronov
Aquatic Co., Moscow, Russia
Paper No:
ESDA2008-59165, pp. 543-550; 8 pages
Published Online:
July 6, 2009
Citation
Tikhonov, VS, & Safronov, AI. "Numerical Simulation of the Drillstring-in-Hole Dynamics at Rotary Drilling." Proceedings of the ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. Volume 2: Automotive Systems; Bioengineering and Biomedical Technology; Computational Mechanics; Controls; Dynamical Systems. Haifa, Israel. July 7–9, 2008. pp. 543-550. ASME. https://doi.org/10.1115/ESDA2008-59165
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