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Marine structure with hydraulic tensioner

  • US 3,983,706 A
  • Filed: 07/10/1975
  • Issued: 10/05/1976
  • Est. Priority Date: 07/10/1975
  • Status: Expired due to Term
First Claim
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1. In a tension leg marine structure for an offshore body of water, including means to apply a buoyant force to the structure, whereby to controllably regulate the floating disposition thereof in a body of water, anchor means at the floor of said body of water, including a plurality of anchors spaced about said floor in a predetermined pattern beneath said marine structure and tension cable means extending between said plurality of anchors and said structure respectively, said cable means being adjustable by applying tension thereto for establishing the floating disposition of said marine structure in the water,a riser extending between, and connected at its respective extremities to said structure, and to a connector means disposed at the ocean floor, and a riser adjustment system including a plurality of hydraulic cylinders connected to and extending between said tension cable means and said riser, said hydraulic cylinders having a piston operably contained therein,and control means including a source of hydraulic fluid communicating with said hydraulic cylinders, and valve means operable to direct the flow of hydraulic fluid through said hydraulic cylinders, whereby to adjustably regulate the horizontal spacing between said riser and said tension cable means.

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