Importance

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Abstract

An improved apparatus for coupling a fixed unit, such as a fluid riser or electrical cable rising from a sea bed and fixed in space, with a movable unit, such as a production vessel floating on the prevailing sea. The apparatus includes a pair of vertically spaced, coaxial, relatively shiftable disks, the lower disk being coupled with the riser or cable, and the upper disk being coupled with the vessel. A conduit extends between and can be moved onto and off the members as a function of the rotation of the vessel due to the wave action. The upper and lower members move in a manner to allow the conduit to move onto the circumferential extent of the outer periphery of one member and off the circumferential extent of the outer periphery of the other member as a function of the rotation of the vessel through at least two revolutions in one direction.

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First Claim