| 摘要 |
A subsea actuating device for actuating a hydraulically operated well tool or function device comprises a fluid-filled hydraulic cylinder, supplying hydraulic pressure to the well tool or function device, a piston slidably arranged in the hydraulic cylinder, a piston rod attached to the piston, an electrical motor rotationally driving a drive shaft; and a transmission device, including a rotational to linear motion converter, arranged to convert a rotational motion of the drive shaft to a linear motion of the piston rod. A plurality of such subsea actuating devices are included in a subsea actuating system for actuating a plurality of hydraulically operated well tools or function devices, wherein each subsea actuating device is attached to a central shaft section. In particular, the central shaft section may be a section of a riser extending from a subsea wellhead to a surface location. |
