发明名称 |
METHOD AND APPARATUS FOR CONTROLLING DRILL STRING TORSIONAL VIBRATION |
摘要 |
The invention relates to a method and apparatus for controlling drill string vibrations during drilling. The apparatus includes a device for measuring the applied torque on the drill string and controller for adjusting the motor driving the drill string to maintain the applied drill string torque at a preselected constant value.
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申请公布号 |
CA2266248(A1) |
申请公布日期 |
2000.09.22 |
申请号 |
CA19992266248 |
申请日期 |
1999.03.22 |
申请人 |
TESCO CORPORATION |
发明人 |
NIKIFORUK, KEVIN J.;JENSEN, KENNETH C. |
分类号 |
E21B44/04;(IPC1-7):E21B7/00 |
主分类号 |
E21B44/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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