发明名称 |
ELEVATOR AND SPIDER APPARATUS |
摘要 |
A device (10) for raising and lowering or supporting a string or multiple strings (71) of pipe into a wellbore, whereby the device (10) provides a means for angular rotation of the pipe gripping elements (70) within the outer body (12) of the device (10) thus, allowing angular misalignment of the pipe axis and the device axis to be compensated for with no detrimental effects to the pipe (71) itself.
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申请公布号 |
WO9821443(A1) |
申请公布日期 |
1998.05.22 |
申请号 |
WO1997US18996 |
申请日期 |
1997.10.10 |
申请人 |
FRANK'S INTERNATIONAL, INC. |
发明人 |
WEBRE, CHARLES, M.;BOULIGNY, VERNON;MOSING, DONALD, E. |
分类号 |
E21B19/07;E21B19/10;(IPC1-7):E21B19/07 |
主分类号 |
E21B19/07 |
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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