| 摘要 |
<p>A winch apparatus (30) is used for deploying or taking in line, such as wireline, over a pulley (20) spaced from the apparatus. The apparatus (30) includes a winch drum (34) mounted on a frame (30) via a swivel (38), the orientation of the drum (34) on the frame (32) being controlled by a pair of hydraulically actuated arms (40, 41), which engage with the respective ends of the drum (34). A sensor, including a pair of fingers (46, 47), is linked to an actuator for the drum arms (40, 41). The fingers (46, 47) detect changes in the fleet angle A of the drum (34) relative to the wireline and as the wireline comes into contact with the finger this actuates the arms (40, 41) to pivot the drum (34) in the appropriate direction to bring the fleet angle within a preferred range.</p> |
