Downhole isolation valve |
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| 申请号 | US15079865 | 申请日 | 2016-03-24 | 公开(公告)号 | US10107075B2 | 公开(公告)日 | 2018-10-23 |
| 申请人 | Weatherford Technology Holdings, LLC; | 发明人 | Michael Brian Grayson; Julmar Shaun Sadicon Toralde; Joe Noske; Christopher L. McDowell; | ||||
| 摘要 | An isolation valve for use with a tubular string includes a tubular housing for connection with the tubular string. A closure member is disposed in the housing and movable between an open position and a closed position. A flow tube is longitudinally movable relative to the housing for opening the closure member. A piston is coupled to the flow tube for moving the flow tube, and a fluid chamber is formed between the flow tube and the housing and receiving the piston. The isolation valve having a first fluid passage for fluid communication between a first portion of the chamber and a control line for moving the piston in a first direction, and a second fluid passage for fluid communication between a second portion of the chamber and a bore of the tubular string for moving the piston in a second direction. | ||||||
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| 说明书全文 | |||||||
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