| 摘要 |
An electrically operated tubing hanger running tool (THRT) comprises an elongated body which includes a first end that is positioned adjacent a tubing hanger 12 and a second end that is connected to a running sting 18, at least first and second locking pistons 42, 44 which are each movably supported on the body, and an electrically operated actuator 70, 78 for moving each of the first and second locking pistons between respective first and second unlocked and first and second locked positions. In the first locked position the first locking piston is engaged with a first locking device to secure the body to the tubing hanger. Also, in the second locked position the second locking piston is engaged with a second locking device to secure the tubing hanger to the wellhead. The electrically operated actuator may comprise electric motors coupled to the locking pistons. Alternatively, the actuator may comprise an electric motor and a hydraulic pump which is driven by the motor. The power for the motor may be supplied by a trickle charged battery. |
