发明名称 |
Tools for shallow flow wellhead systems |
摘要 |
A tool is employed to shift an external valve sleeve on an outer wellhead housing at a subsea location. The tool has an engaging member that moves between upper and lower positions. The tool has a locking member that locks to the inner wellhead housing with the engaging member sliding over the outer wellhead housing. In one embodiment, the tool also is employed to run the inner wellhead housing and preload it. The engaging member moves to a lower position to shift the valve sleeve after the inner wellhead housing has been preloaded by the tool. In another embodiment, the tool is lowered over a previously installed inner wellhead housing to retrieve the valve sleeve for repair or replacement.
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申请公布号 |
US5791418(A) |
申请公布日期 |
1998.08.11 |
申请号 |
US19960646674 |
申请日期 |
1996.05.10 |
申请人 |
ABB VETCO GRAY INC. |
发明人 |
MILBERGER, LIONEL J.;MICAN, GILBERT P.;FORD, DAVID L. |
分类号 |
E21B33/043;E21B33/14;E21B34/04;(IPC1-7):F21B33/14 |
主分类号 |
E21B33/043 |
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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