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Semi-submersible floating production facility

  • US 6,701,861 B2
  • Filed: 05/03/2002
  • Issued: 03/09/2004
  • Est. Priority Date: 05/03/2002
  • Status: Expired due to Term
First Claim
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1. A semi-submersible vessel, comprising:

  • a ring pontoon comprised of pontoon members rigidly connected together, said pontoon members forming an equilateral triangle;

    a plurality of main columns extending upwardly from locations adjacent to corners of the ring pontoon, while the pontoon members extend outboard of the main columns;

    a plurality of secondary columns, each secondary column having a water plane significantly smaller than the water plane of any of the main columns, said secondary columns extending upwardly from the pontoon members; and

    a deck supported by upper portions of said main columns and said secondary columns.

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