发明名称 |
A TOP DRIVE WELL DRILLING APPARATUS |
摘要 |
A top drive well drilling apparatus includes a body with means for suspending the body from a drilling rig. A motor is secured to the body. The motor has a central passage defining a rotational axis. The central passage is adapted to receive a tubular drive shaft. A pipe gripping assembly is provided which underlies and is in axial alignment with the central passage. The pipe gripping assembly rotates independent of the motor for purposes of orientation.
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申请公布号 |
CA2390365(A1) |
申请公布日期 |
2002.09.30 |
申请号 |
CA20022390365 |
申请日期 |
2002.07.03 |
申请人 |
NIELSEN, SHAWN JAMES;DOBRIJEVIC, SINISA |
发明人 |
NIELSEN, SHAWN JAMES;DOBRIJEVIC, SINISA |
分类号 |
E21B3/02;E21B19/16;(IPC1-7):E21B3/02;E21B4/00;E21B15/00 |
主分类号 |
E21B3/02 |
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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