DOWNHOLE ISOLATION VALVE |
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| 申请号 | EP16162187.5 | 申请日 | 2016-03-24 | 公开(公告)号 | EP3073048A3 | 公开(公告)日 | 2017-03-22 |
| 申请人 | Weatherford Technology Holdings, LLC; | 发明人 | GRAYSON, Michael Brian; TORALDE, Julmar Shaun Sadicon; NOSKE, Joe; MCDOWELL, Christopher, L.; | ||||
| 摘要 | An isolation valve for use with a tubular string includes a tubular housing for connection with the tubular string; a closure member disposed in the housing and movable between an open position and a closed position; a flow tube longitudinally movable relative to the housing for opening the closure member; a piston for moving the flow tube; a hydraulic chamber formed between the flow tube and the housing and receiving the piston; a first hydraulic passage for fluid communication between a first portion of the chamber and a control line and for moving the piston in a first direction; and a second hydraulic passage for fluid communication between a second portion of the chamber and a bore of the tubular string and for moving the piston in a second direction. A single control line may be used to operate the isolation valve between an open position and a closed position. | ||||||
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| 说明书全文 | |||||||
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