发明名称 |
Bidirectional Sealing Mechanically Shifted Ball Valve for Downhole Use |
摘要 |
A downhole ball valve is mounted n a string and features a rotating ball that turns on its axis as it is held against an upstream and a downstream seal by a cage. The cage accepts a slide that engages the ball off-center to rotate it between the open and closed positions. The slide is operated by a sleeve attached to a piston assembly. The sleeve is mechanically operated in opposed directions such as by a wireline shifting tool. Differential pressure on a closed ball does not affect the actuation piston because pressure across the actuating piston is balanced while holding pressure differential across the closed ball. A check valve allows the actuation piston to be in pressure balance as the ball stays closed.
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申请公布号 |
US2009184278(A1) |
申请公布日期 |
2009.07.23 |
申请号 |
US20090359786 |
申请日期 |
2009.01.26 |
申请人 |
BEALL CLIFFORD H;SLOAN JAMES T;PATTERSON RICHARD |
发明人 |
BEALL CLIFFORD H.;SLOAN JAMES T.;PATTERSON RICHARD |
分类号 |
F16K5/06 |
主分类号 |
F16K5/06 |
代理机构 |
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代理人 |
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主权项 |
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