One trip slim wellhead systems and methods
AssigneeCameron International Corporation
InventorDennis NGUYEN
Life of this patent
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Abstract
A wellhead system includes a first casing hanger configured to support a first casing. The wellhead system also includes a second casing hanger configured to support a second casing within the first casing. The wellhead system further includes a seal assembly configured to provide an annular seal between the first casing hanger and the second casing hanger. The seal assembly is configured to move between a first position in which the seal assembly enables a flow of fluid across the second casing hanger and a second position in which the seal assembly blocks the flow of fluid across the second casing hanger.
Claims20
A wellhead system, comprising:
- a first casing hanger configured to support a first casing;
- a second casing hanger configured to support a second casing within the first casing;
- and
- a seal assembly configured to provide an annular seal between the first casing hanger and the second casing hanger, wherein the seal assembly is configured to move between a first position in which the seal assembly enables a flow of fluid across the second casing hanger and a second position in which the seal assembly blocks the flow of fluid across the second casing hanger.
A wellhead system, comprising:
- a casing hanger comprising a flow path and configured to support a casing;
- and
- a seal assembly configured to provide an annular seal between the casing hanger and an additional annular structure, wherein the seal assembly is configured to move between a first position in which the seal assembly enables a flow of fluid across the casing hanger via the flow path and a second position in which the seal assembly blocks the flow of fluid across the casing hanger via the flow path.
A method of operating a wellhead system, the method comprising:
- running a hanger and a seal assembly within an additional hanger;
- performing cementing operations while the seal assembly is in a first axial position to enable a flow of fluid across the seal assembly via a passage formed through the hanger;
- and
- after the cementing operations, moving the seal assembly to a second axial position to block the flow of fluid across the seal assembly and to seal an annular space between the hanger and the additional hanger with the seal assembly.
Dependencies are inferred from the claim text.