发明名称 |
DUAL VALVE WELL CONTROL IN UNDERBALANCED WELLS |
摘要 |
A method of isolating a reservoir of production fluid in a formation comprises providing a pair of valves (14, 16) in a bore intersecting a production formation and in which the hydrostatic pressuer in the bore at the formation is normally lower than the formation pressure, and then ontrolling the valves (14, 16) from surface such that the valves (14, 16) will only move from a closed configuration to an open configuration on experiencing a predetermined differential pressure across the valves.
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申请公布号 |
WO0233215(A8) |
申请公布日期 |
2006.08.17 |
申请号 |
WO2001GB04619 |
申请日期 |
2001.10.17 |
申请人 |
WEATHERFORD/LAMB, INC.;PIA, GIANCARLO |
发明人 |
PIA, GIANCARLO |
分类号 |
E21B21/00;E21B34/08;E21B34/10 |
主分类号 |
E21B21/00 |
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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