Reverse torque drive system

Details Reverse torque drive system Reverse torque drive system

E - Fixed Constructions

21

B

E21B 4/02 (2006.01) E21B 44/02 (2006.01)

Patent

CA 2701531

A reverse torque drive system for a wellhead has a hydraulic pump having an inlet and an outlet, and a hydraulic motor having a first port and a second port. There is a valve body having a first position that connects the outlet of the hydraulic motor to the first port and the second port to the inlet, and a second position that connects the outlet to the second port and the first port to the inlet. One or more sensors are connected to measure a condition, and a controller moves the valve body from the first position to the second position upon the sensor sensing a predetermined condition.

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