发明名称 |
SPEED CONTROL DRIVE SECTION WITH FAILSAFE VALVE |
摘要 |
A system and method for retrieving a pipeline tool from a pipeline includes a speed control drive section that includes a primary bypass flow valve and a failsafe valve located in a central bypass flow passageway of the drive section. The failsafe valve is placed under the control of a controller. The controller is programmed to release the failsafe valve under prescribed failure conditions. An actuating means moves the failsafe valve between a normally opened positioned and a closed position in response to the controller. |
申请公布号 |
CA2773613(A1) |
申请公布日期 |
2011.02.17 |
申请号 |
CA20102773613 |
申请日期 |
2010.08.11 |
申请人 |
TDW DELAWARE, INC. |
发明人 |
LUDLOW, JED;LAURSEN, PAUL;GLASS, KEITH;WARKENTIN, JONATHAN |
分类号 |
F16L55/38 |
主分类号 |
F16L55/38 |
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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