发明名称 |
Downhole deployment valves |
摘要 |
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 that is disposed in a housing of the DDV and is designed to close against a seat 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. |
申请公布号 |
US8261836(B2) |
申请公布日期 |
2012.09.11 |
申请号 |
US20080098264 |
申请日期 |
2008.04.04 |
申请人 |
NOSKE JOE;IBLINGS DAVID;PAVEL DAVID;BRUNNERT DAVID J.;SMITH PAUL;GRAYSON MICHAEL BRIAN;WEATHERFORD/LAMB, INC. |
发明人 |
NOSKE JOE;IBLINGS DAVID;PAVEL DAVID;BRUNNERT DAVID J.;SMITH PAUL;GRAYSON MICHAEL BRIAN |
分类号 |
E21B34/06;E21B34/12 |
主分类号 |
E21B34/06 |
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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