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
WO2011019808(A1)
申请公布日期
2011.02.17
申请号
WO2010US45158
申请日期
2010.08.11
申请人
TDW DELAWARE, INC.;LUDLOW, JED;GLASS, KEITH;WARKENTIN, JONATHAN;LAURSEN, PAUL
发明人
LUDLOW, JED;GLASS, KEITH;WARKENTIN, JONATHAN;LAURSEN, PAUL