Finite Element Analysis on Axial-Torsional Coupled Vibration of Drill String

Abstract:

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In the drilling process, axial vibration, transverse vibration and torsional vibration happen to drilling string. And the coupled vibration is more complex. In the resonance state, drilling string collides with the wall, which causes serious damage on drilling string in a short time and results in economic loss to the drilling operation. In this paper, the regularity of coupled vibration is analyzed by using finite element method. The model of full-hole drilling strings is established. The distribution regularities of coupled resonant frequency are obtained through computer analysis. The coupled model is more accurate than single vibration model. And the gaps of high rotary speed resonance regions are larger. Resonance state can be avoided by changing rotary speed, and drilling accidents can be reduced.

Info:

Periodical:

Advanced Materials Research (Volumes 291-294)

Edited by:

Yungang Li, Pengcheng Wang, Liqun Ai, Xiaoming Sang and Jinglong Bu

Pages:

1952-1956

DOI:

10.4028/www.scientific.net/AMR.291-294.1952

Citation:

X. L. Bi et al., "Finite Element Analysis on Axial-Torsional Coupled Vibration of Drill String", Advanced Materials Research, Vols. 291-294, pp. 1952-1956, 2011

Online since:

July 2011

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Price:

$35.00

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