发明名称 |
Method for detecting a leak in a drill string valve |
摘要 |
A method for detecting a leak in a drill string valve used when drilling a subsea well. The method comprises measuring a first inlet pressure at a subsea mudlift pump while a subsea mudlift pump and a surface pump are operating and before a well is fully shut-in and measuring a second inlet pressure at the subsea mudlift pump after the mudlift pump and the surface pump are shut down and after the well is fully shut-in. The first and second subsea mudlift pump inlet pressure measurements are then compared, and a check is performed to determine if the subsea mudlift pump inlet pressure has increased by an amount greater than an estimated annular friction pressure.
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申请公布号 |
US2002066569(A1) |
申请公布日期 |
2002.06.06 |
申请号 |
US20000730891 |
申请日期 |
2000.12.06 |
申请人 |
SCHUBERT JEROME J.;ALEXANDER CARMON H.;JUVKAM-WOLD HANS C.;WEDDLE CURTIS E.;CHOE JONGGEUN |
发明人 |
SCHUBERT JEROME J.;ALEXANDER CARMON H.;JUVKAM-WOLD HANS C.;WEDDLE CURTIS E.;CHOE JONGGEUN |
分类号 |
E21B21/08;(IPC1-7):E21B7/128;E21B44/00;E21B47/00 |
主分类号 |
E21B21/08 |
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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