| 发明名称 |
Downhole shut-in tool |
| 摘要 |
The invention provides a downhole shut-in tool for obtaining formation pressure data. The tool includes a fast-closing main valve and a pressure-relief valve operable between open and closed positions to effect periodic sealing and release of formation pressure with respect to the surface.
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| 申请公布号 |
US2004226721(A1) |
申请公布日期 |
2004.11.18 |
| 申请号 |
US20030435262 |
申请日期 |
2003.05.12 |
| 申请人 |
FELUCH PAUL JOHN;TIMOFFEE BORIS |
发明人 |
FELUCH PAUL JOHN;TIMOFFEE BORIS |
| 分类号 |
E21B34/06;E21B34/10;(IPC1-7):E21B34/06;E21B43/00 |
主分类号 |
E21B34/06 |
| 代理机构 |
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