Systems and methods for cementing casing and sealing a hanger in a wellhead housing
AssigneeCameron International Corporation
InventorsAndrew SANDERS, Kyle SOMMERFELD, Leonard VOGEL, Nicholas RUFF, Dennis NGUYEN
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Abstract
A wellhead includes a wellhead housing, a passage formed in or along the wellhead housing, and a hanger configured to support a casing. The wellhead also includes a seal assembly configured to provide an annular seal across an annular space between the hanger and the wellhead housing. In operation, a movable seal component or the seal assembly is configured to move relative to the passage to selectively enable a flow of fluid across the seal assembly via the passage.
Claims20
A wellhead, comprising:
- a wellhead housing;
- a passage formed in or along the wellhead housing;
- a hanger configured to support a casing;
- and
- a seal assembly configured to provide an annular seal across an annular space between the hanger and the wellhead housing;
- wherein a movable seal component or the seal assembly is configured to move relative to the passage to selectively enable a flow of fluid across the seal assembly via the passage.
A method of operating a wellhead, the method comprising:
- running a hanger and a seal assembly into a wellhead housing;
- routing a flow of fluid across the seal assembly via a passage formed in the wellhead housing during cementing operations with the hanger and the seal assembly in the wellhead housing;
- and
- after the cementing operations, moving a movable component or the seal assembly relative to the wellhead housing to block the flow of fluid across the seal assembly and to seal an annular space between the hanger and the wellhead housing with the seal assembly.
A wellhead, comprising:
- a wellhead housing;
- a passage formed in the wellhead housing;
- a hanger configured to support a casing;
- and
- a seal assembly configured to move relative to the hanger between a first axial position and a second axial position within the wellhead housing;
- wherein, in the first axial position, the seal assembly enables a flow of fluid across the seal assembly via the passage;
- wherein, in the second axial position, the seal assembly blocks the flow of fluid across the seal assembly via the passage and provides an annular seal across an annular space between the hanger and the wellhead housing.
Dependencies are inferred from the claim text.