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Lifting vessel and method for positioning, lifting and handling a platform deck and a jacket

  • US 6,668,746 B1
  • Filed: 06/07/2002
  • Issued: 12/30/2003
  • Est. Priority Date: 06/07/1999
  • Status: Expired due to Term
First Claim
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1. A lifting vessel (1) for positioning, lifting and handling a marine structure by establishing a connection between the lifting vessel (1) and the marine structure, the lifting vessel (1) comprising a lower U-shaped pontoon foundation (2a, 2b, 2c), and columns (5) attached to the pontoon foundation (2a, 2b, 2c) for extending upwards towards and through a water surface, characterised by each of the columns being free-standing above the pontoon foundation (2a, 2b, 2c) and a number of the columns (5) being equipped with an external plane wall (6), tangentially arranged on the number of the columns.

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