| 摘要 |
An arrangement for deployment of a payload onto a sea surface or into subsurface from a marine structure, and/or payload retrieval from the sea onto the marine structure. The system comprises a crane assembly for both horizontal and vertical translation of the payload, the crane assembly configured to be operatively and movably attached at an upper, first level and at a lower, second level to structures of the marine structure. The crane assembly has a) an upper part which is inclined relative to the horizontal, the inclination being adjustable, the upper part having a first pair of longitudinal beams and a reinforcing frame bridging the beams, and an upper end of the beams being movable along a rail system related to the first level structure by means of a controllable upper drive means, b) a lower part constituted by a second pair of beams or rails which at an outer end region thereof are linked to an outer end region of the upper part constituted by an outer end of the first beams of the upper part; and at the inner end region thereof is movable relative to said second level structure; and c) a payload deployment carriage controllably movable along the longitudinal beams of the upper part, wherein the carriage is associated with means for gripping and/or moving the payload. In a currently preferred mode, the crane assembly is operatively associated with a winch for wire, rope, wireline or umbilical for supporting and moving the payload. A pitch and roll movement attenuating snubber device is associated with the carriage. |
