One-trip wellhead installation systems and methods

  • US 6,918,446 B2
  • Filed: 10/08/2003
  • Issued: 07/19/2005
  • Est. Priority Date: 05/24/2001
  • Status: Active Grant
First Claim
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1. A wellhead assembly system comprising:

  • a) a tubing head adapted to be landed upon a floating structure, the tubing head comprising a housing having a generally vertically-disposed bore therethrough and a landing profile for selectively engaging a floating structure;

    b) a running and setting tool comprising;

    a central piston assembly radially disposed within the bore of the tubing head and being axially moveable therewithin, a landing sub affixed to a lower end of the central piston assembly and being selectively securable to a riser section member of a riser string extending to a subsea wellhead;

    a fluid bore disposed through the central piston assembly and landing sub; and

    a matching profile upon the central piston assembly for reversably interconnecting the central piston assembly with the tubing head housing.

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