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Turret mooring system for concrete hull vessel

  • US 7,225,749 B2
  • Filed: 07/26/2004
  • Issued: 06/05/2007
  • Est. Priority Date: 07/30/2003
  • Status: Active Grant
First Claim
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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.

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