Nortrans Offshore (s) Pte Ltd

David Lee Choon

Alan Gregory Hooper

Babu George

A mooring system employs a vessel mounted turret in combination with a submerged chain table that also acts as a clump weight. The chain table is submerged fairly close to the sea surface at approximately the keel depth of the vessel, or a few meters below that depth. Three or more chains connect the vessel mounted turret and chain table to one another, preferably though corresponding U-joints. Several mooring lines are attached at first ends to the bottom of the chain table, and are secured at second ends to anchors or piles in the seabed. The weight of the chain table is chosen so that it helps reduce the stresses imparted by the vessel to the mooring lines, thereby reducing the maximum load requirement, and thus cost, of the mooring lines. In addition, a vessel mounted drive system is not needed for the turret mooring because the chains connecting the chain table to the turret mooring are positioned and spaced in such a manner that they apply enough force to the turret that it will remain in position relative to the chain table when the vessel rotates in response to wind or wave forces.

Growing community of inventors

Singapore, Singapore

David Lee Choon