发明名称 |
ROTATIONAL WELLBORE TEST VALVE |
摘要 |
According to one embodiment, a rotationally activated downhole well valve for connection in a tubing string is disclosed that can be repeatedly opened and closed selectively to place the tubing string in communication with the annulus. The valve is moved between the closed position and the open position by rotating the string in the first direction. |
申请公布号 |
US2012181018(A1) |
申请公布日期 |
2012.07.19 |
申请号 |
US201113007168 |
申请日期 |
2011.01.14 |
申请人 |
RINGGENBERG PAUL DAVID;CARDER CHARLES FREDERICK |
发明人 |
RINGGENBERG PAUL DAVID;CARDER CHARLES FREDERICK |
分类号 |
E21B47/06;E21B33/12;E21B34/06 |
主分类号 |
E21B47/06 |
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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