发明名称 |
Bi-directional sealing ram |
摘要 |
A shuttle valve assembly in a ram-type BOP selectively connects the volume behind the rams to the more highly pressurized wellbore volume adjacent to the rams (either above or below the rams). The connection made is free flowing in both directions (no check valves) allowing for evacuation and fluctuations with changes in wellbore pressure.
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申请公布号 |
US6164619(A) |
申请公布日期 |
2000.12.26 |
申请号 |
US19990226197 |
申请日期 |
1999.01.07 |
申请人 |
TUBOSCOPE I/P, INC. |
发明人 |
VAN WINKLE, DENZAL WAYNE;MCWHORTER, DAVID |
分类号 |
E21B33/06;(IPC1-7):E21B33/06 |
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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