发明名称 |
Method and apparatus for drilling a subsea well |
摘要 |
A method of drilling a subsea well involves partial drilling of several wells within a cluster. A base such as a template will have a receptacle. A gimbal mounts to a latching mechanism which in turn releasably latches an outer wellhead housing. The latching mechanism has an upward facing guide funnel. After setting conductor pipe, the well is drilled to a selected depth, an inner wellhead housing and a first string of casing are lowered through the funnel. The running tool for the inner wellhead housing has a funnel retriever which latches to the funnel. After the casing has been cemented, upward movement of the running tool will pull the funnel, latching mechanism and gimbal to the surface.
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申请公布号 |
US5316089(A) |
申请公布日期 |
1994.05.31 |
申请号 |
US19910781054 |
申请日期 |
1991.10.18 |
申请人 |
ABB VETCO GRAY INC. |
发明人 |
FERNANDEZ, RANDOLFO M.;BRAMMER, NORMAN |
分类号 |
E21B7/128;E21B33/035;E21B43/017;(IPC1-7):E21B7/128 |
主分类号 |
E21B7/128 |
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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