RELATIONSHIP TO RISES CONCERNED BY WEIGHTING COMPENSATION

摘要

A connector assembly for use on a vessel to eliminate relative vertical movement (heave) between the vessel and a riser (20, fig 4) attached to a sub-sea well, includes a first connector part 4 to be secured to the riser (20, fig 4) and a second connector part 3 to be secured to the vessel. The second connector part 3 is connectable to the first connector part 4 without relative axial movement and disconnectable from the first connector part 4 to allow relative axial movement between the first 4 and second 3 connector parts. There is also an alignment mechanism 30 which, when the first 4 and second 3 connector parts are disconnected, maintains the connector parts 4, 3 in axial alignment and spaced apart in a non-sealed manner by a gap the size of which varies with relative axial movement of the first 4 and second 3 connector parts.