发明名称 |
Downhole deployment valves |
摘要 |
<p>Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member such as a flapper (102) that is disposed in a housing of the DDV and is designed to close against a seat (110) within the housing. The DDV includes an operating mechanism for opening/closing the DDV. In use, pressure in one portion of a well that is in fluid communication with a well surface may be bled off and open at well surface while maintaining pressure in another portion of the casing string beyond the DDV.</p> |
申请公布号 |
EP2535504(A1) |
申请公布日期 |
2012.12.19 |
申请号 |
EP20120183750 |
申请日期 |
2008.03.31 |
申请人 |
WEATHERFORD/LAMB INC. |
发明人 |
NOSKE, JOE;IBLINGS, DAVID;PAVEL, DAVID;BRUNNERT, DAVID J.;SMITH, PAUL L.;GRAYSON, MICHAEL BRIAN |
分类号 |
E21B34/10;E21B21/08;E21B21/10;E21B34/14 |
主分类号 |
E21B34/10 |
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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