Dynamic Stability of Lateral Vibration of Bottom Hole Assemblies

Abstract:

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Bottom hole assemblies (BHA) of oil drilling engineering were simplified as simply supported beam, and parametric resonances of BHA in mud drilling and air drilling were studied. Lateral vibration of BHA, which was induced by bit/formation interaction, was described and reduced into Mathieu equation by means of separation of variables and Galerkin method. Modified strained parameter method was adopted in stability analysis. The parametric resonance zones expressed by weight on bit (WOB) are presented here. It is found that drilling method, speed of rotation (SOR), material properties, and length of compression drillstring all can influence parametric resonance zones. So unstable responses can be avoided by adjusting these parameters.

Info:

Periodical:

Key Engineering Materials (Volumes 385-387)

Edited by:

H.S. Lee, I.S. Yoon and M.H. Aliabadi

Pages:

809-812

DOI:

10.4028/www.scientific.net/KEM.385-387.809

Citation:

G. H. Zhao and Z. Liang, "Dynamic Stability of Lateral Vibration of Bottom Hole Assemblies", Key Engineering Materials, Vols. 385-387, pp. 809-812, 2008

Online since:

July 2008

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Price:

$35.00

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