Patent ID: 7225749
Filing Date: 2007-06-05
Classification: B63B

Abstract:
1. In combination with a vessel which includes a concrete hull, a moonpool which extends generally vertically through the hull, and a moonpool wall which is defined by the moonpool, the improvement comprising a turret mooring system which comprises: a turret which is positioned in the moonpool; an upper bearing substructure which is mounted to an upper shoulder which is formed in the moonpool wall; an upper bearing which includes a non-rotatable part that is connected to an upper end portion of the turret and a rotatable part that is connected to the upper bearing substructure; and a lower bearing frame which is mounted to a lower shoulder which is formed in the moonpool wall; wherein the outer diameter of the upper bearing substructure is greater than the inner diameter of the upper shoulder; and wherein the outer diameter of the lower bearing frame is less than the inner diameter of the upper shoulder but greater than the inner diameter of the lower shoulder.