发明名称 |
COMBINED GRIP CONTROL OF ELEVATOR AND SPIDER SLIPS |
摘要 |
Apparatus for gripping and releasing a tubular and comprising an elevator (13) having slips (15) for gripping and releasing a tubular (39,40). A spider (12) has slips (14) for gripping and releasing the tubular (33). A mechanically operated valve (18) is provided for controlling the supply of pressurised fluid to move the spider slips (14) between a gripping position and a release position, with sensor means (28) detecting when the elevator slips (15) are in the gripping position. Means (31) mechanically inhibits movement of the valve (18) to a position in which the spider slips (14) release the tubular (40) when said sensor means (28) detects that the elevator slips (15) are not in a correctly gripping position. A second valve (20) controls movement of the elevator slips (15) and a guide plate (24) links control of both valves (18, 20). |
申请公布号 |
CA2427754(C) |
申请公布日期 |
2008.09.23 |
申请号 |
CA20012427754 |
申请日期 |
2001.11.05 |
申请人 |
WEATHERFORD/LAMB, INC. |
发明人 |
SCHULZE-BECKINGHAUSEN, JOERG ERICH;PIETRAS, BERND-GEORG |
分类号 |
E21B19/07;E21B19/10;E21B44/02 |
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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