Wellhead assemblies and methods
AssigneeOnesubsea, LLC
InventorsChristopher Almeland Knudtzon, Arild Nor Buset, Martin Pedersen
Life of this patent
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Abstract
A wellhead assembly comprises a foundation having at least one well slot. The at least one well slot comprises a receptacle having an internal profile for holding a well pipe and a sleeve arranged in the receptacle. The sleeve is vertically movable and has a top end, which in a first position of the sleeve is located above the internal profile and in a second position of the sleeve is located below the internal profile. There is also provided a method of installing a wellhead assembly at a seabed.
Claims14
A wellhead assembly comprising:
- a foundation having at least one well slot, the at least one well slot comprising a receptacle having an internal profile for holding a well pipe;
- and
- a sleeve arranged in the receptacle;
- wherein the sleeve is vertically movable and has a top end which in a first position of the sleeve is located above the internal profile and in a second position of the sleeve is located below the internal profile;
- wherein the receptacle comprises two vertically spaced support faces for alignment of the sleeve, where the support faces are located below the internal profile.
A method of installing a wellhead assembly at a seabed, the method comprising:
- positioning a foundation at the seabed, where the foundation includes at least one well slot having a receptacle having at least one cement port and an internal profile for holding a well pipe;
- positioning a sleeve in the receptacle in a first position via a vertical lock configured to temporarily hold the sleeve in the first position;
- bringing the sleeve into the seabed in a second position, where two support faces are arranged along a central axis of the receptacle and configured for alignment of the sleeve within the receptacle in the second position, the two support faces being disposed below the internal profile and the at least one cement port;
- lowering the well pipe through the sleeve and into the seabed;
- and
- cementing the well pipe in place inside the sleeve.
Dependencies are inferred from the claim text.