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Apparatus and Method for Laying Down, Abandoning, and Recovering a Pipe on the Sea Floor

  • US 20070177944A1
  • Filed: 01/29/2007
  • Published: 08/02/2007
  • Est. Priority Date: 01/31/2006
  • Status: Active Grant
First Claim
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1. A method of positioning on a sea floor, from a floating vessel, a last end portion of a pipe that is being laid on the sea floor, comprising the steps of:

  • lowering the last end portion of the pipe from a first lowering/raising device on the vessel to a depth in the sea that is less than the depth of the sea floor;

    transferring a load of the pipe to a second lowering/raising device on the vessel having a relatively lower capacity than the first lowering device; and

    lowering the last end portion of the pipe from the lower capacity second lowering/raising device to the sea floor.

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