Patent ID: 8573891
Filing Date: 2013-11-05
Classification: B63B

Abstract:
1. An offshore structure, comprising: a base configured to be secured to the sea floor; an elongate stem having a longitudinal axis, a first end distal the base and a second end pivotally coupled to the base, wherein the stem comprises a plurality of stem modules coupled together end-to-end, wherein each stem module includes a variable ballast chamber; an upper module coupled to the first end of the stem, wherein the upper module includes a variable ballast chamber; a first ballast control conduit in fluid communication with the variable ballast chamber of the upper module, wherein the first ballast control conduit is configured to supply a gas to the variable ballast chamber of the upper module and vent the gas from the variable ballast chamber of the upper module; a second ballast control conduit moveably coupled to the stem, wherein the second ballast control conduit is configured to supply a gas to one or more of the variable ballast chambers of the stem modules; and a deck mounted to the upper module.