Drill-string dynamics

Reduced-order models and experimental studies

Chien Min Liao, Balakumar Balachandran, Mansour Karkoub, Youssef L. Abdel-Magid

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

In this article, reduced-order models of a drill-string system are developed, the predictions of these models are studied, and qualitative comparisons are made with experimental studies. The reduced-order models allow for radial, bending, and torsion motions of a flexible drill string and stick-slip interactions between the drill string and an outer shell. Qualitative changes in the system motions are studied with respect to the rotation speed of the drill string and the friction coefficient between the drill string and the outer shell. The nonlinear motions predicted by the model are in agreement with the experimental observations, and these studies suggest that there may be preferred friction coefficient values for which most of the drill-string motions occur close to the center of a borehole. These modeling and experimental studies can serve as an important basis for furthering our understanding of drill-string dynamics and schemes for controlling them.

Original languageEnglish
Article number041008
JournalJournal of Vibration and Acoustics, Transactions of the ASME
Volume133
Issue number4
DOIs
Publication statusPublished - 2011

Fingerprint

Drill strings
strings
coefficient of friction
Friction
Stick-slip
boreholes
Boreholes
Torsional stress
torsion
slip
predictions

Keywords

  • drill string
  • reduced-order model
  • stick-slip interactions

ASJC Scopus subject areas

  • Acoustics and Ultrasonics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Drill-string dynamics : Reduced-order models and experimental studies. / Liao, Chien Min; Balachandran, Balakumar; Karkoub, Mansour; Abdel-Magid, Youssef L.

In: Journal of Vibration and Acoustics, Transactions of the ASME, Vol. 133, No. 4, 041008, 2011.

Research output: Contribution to journalArticle

Liao, Chien Min ; Balachandran, Balakumar ; Karkoub, Mansour ; Abdel-Magid, Youssef L. / Drill-string dynamics : Reduced-order models and experimental studies. In: Journal of Vibration and Acoustics, Transactions of the ASME. 2011 ; Vol. 133, No. 4.
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