发明名称 |
APPARATUS AND METHODS FOR TUBULAR MAKEUP INTERLOCK |
摘要 |
<p>Apparatus and methods are provided to prevent an operator from inadvertently dropping a string into a wellbore during assembling and disassembling of tubulars. In one embodiment, an interlock system is used to control the operations of a gripping apparatus connected to the top drive and a spider such that at least one of the top drive or the spider retains the tubular. The interlock system allows the spider to open when the gripping apparatus is supporting a load of the tubular or is in position to support a load of the tubular.</p> |
申请公布号 |
EP2142752(A2) |
申请公布日期 |
2010.01.13 |
申请号 |
EP20080746970 |
申请日期 |
2008.04.25 |
申请人 |
WEATHERFORD/LAMB INC. |
发明人 |
PIETRAS, BERND-GEORG;ABRAHAMSEN, EGILL |
分类号 |
E21B19/16 |
主分类号 |
E21B19/16 |
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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