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Semisubmersible vessel with forward-mounted crane

  • US 5,558,037 A
  • Filed: 03/15/1995
  • Issued: 09/24/1996
  • Est. Priority Date: 03/15/1995
  • Status: Expired due to Term
First Claim
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1. A semisubmersible floating vessel having a pair of substantially parallel, laterally spaced buoyant hulls with ballast chambers to permit said hulls to be moved between a submerged condition and a surface floating condition, a row of columns supported by and extending upwardly from each said hull, and a working platform supported by the upper ends of said columns, wherein the improvement comprises:

  • a crane mounted on said platform adjacent to an end of said platform, said crane having sufficient capacity to lift loads off said end of said platform and at least one side of said platform and from a portion of said platform extending from said end of said platform to at least about halfway to an opposite end of said platform; and

    a support structure for said crane;

    said structure extending downwardly from said crane, through said platform to one of said columns, and down into said one of said columns; and

    said structure interfacing with sidewall portions of said one of said columns to transmit forces created by operation of said crane to said one of said columns.

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