| 摘要 |
An actuator device (1) for moving a tool within a borehole in the ground, the actuator (1) being positioned between a coiled tubing (2) and a tool, and the actuator (1) being arranged to move the tool at a substantially constant axial speed and the actuator (1) including a motor-operated mandrel (30) which is moved outwards in the actuator (1) by means of a releasable nut (28), the nut (28) being locked in its active position by means of a hydraulically operated locking piston (48). |
