On the Effective Control of Torsional Vi
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W.R. Tucker; C. Wang
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Article
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1999
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Elsevier Science
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English
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This paper analyses a control mechanism designed to signiยฎcantly ameliorate the sustained excitation of torsional relaxation oscillations (slipยฑstick) due to frictional torques generated by an active bit during drilling operations with an extended drill-string. The proposed mechanism of torsional re