发明名称 |
Bidirectional sealing blowout preventer |
摘要 |
Disclosed are a bidirectional sealing blowout preventer, bidirectional sealing blowout preventer rams, and fluid communication systems for equalizing pressure between the backs of ram guideways in a bidirectional sealing blowout preventer and a passageway through the blowout preventer. Disclosed are methods for operating a bidirectional sealing blowout preventer to seal a well around a well pipe against downhole pressure to control the well, and to seal a well around a well pipe to pressure test another blowout preventer or other apparatus in a stack.
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申请公布号 |
US2003024705(A1) |
申请公布日期 |
2003.02.06 |
申请号 |
US20010923209 |
申请日期 |
2001.08.06 |
申请人 |
WHITBY MELVYN F.;TASSON PAUL L.;WILLIAMS BOLIE C. |
发明人 |
WHITBY MELVYN F.;TASSON PAUL L.;WILLIAMS BOLIE C. |
分类号 |
E21B33/06;E21B33/064;(IPC1-7):E21B33/064 |
主分类号 |
E21B33/06 |
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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