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Sub-sea well intervention vessel and method

  • US 20070251695A1
  • Filed: 09/22/2006
  • Published: 11/01/2007
  • Est. Priority Date: 04/27/2006
  • Status: Abandoned Application
First Claim
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1. A sub-sea well intervention vessel comprising a dynamically positionable tanker and direct well intervention equipment mounted on the deck of the tanker, the direct well intervention equipment including drilling equipment for underbalanced rotating or non-rotating drilling for connection to a drilling riser and a hydrocarbon liquid separator coupled to storage tanks of the tanker such that separated hydrocarbon liquids can be stored in the tanker, wherein there is provided production plant and a coupling arrangement for coupling the plant to at least one production riser that is separate from the drilling riser, the production riser being for connection to a sub-sea manifold associated with the well, thereby allowing simultaneous underbalanced drilling and production via separate risers, the drilling equipment being selectively disconnectable from the well to allow production only via the production riser.

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