Intervention system dynamic seal and compliant guide
AssigneeSchlumberger Technology Corporation
InventorAndrea Sbordone
Life of this patent
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Abstract
A technique for subsea intervention operations utilizes a retrievable dynamic seal assembly. The retrievable dynamic seal assembly is deployed toward a seabed and locked into place within a tubular member at a subsea installation. During deployment, the dynamic seal assembly is releasably locked to an intervention tool string coupled to a conveyance. Once the dynamic seal assembly is locked in place within the tubular, the tool string is released and the dynamic seal assembly maintains a seal against the conveyance during an intervention operation.
Claims27
A system for use with a subsea well, comprising:
- a compliant guide extending between a surface location and a subsea installation;
- and
- a dynamic seal sized for movement through the compliant guide to a desired location, the dynamic seal having a locking mechanism to lock the dynamic seal at the desired location.
A method of intervening in a subsea well, comprising:
- coupling a compliant guide between a surface location and a subsea installation;
- moving a dynamic seal down through the compliant guide to a desired subsea location;
- and
- locking the dynamic seal into an operative position at the desired subsea location.
A method of performing a subsea intervention operation, comprising:
- releasably connecting a retrievable dynamic seal assembly above a tool string coupled to a conveyance;
- landing the retrievable dynamic seal assembly in a tubular having a lubricating chamber to facilitate deployment of the tool string into a pressurized subsea installation;
- locking the retrievable dynamic seal assembly at its landing position in the tubular;
- releasing the tool string;
- and
- activating the retrievable dynamic seal assembly to form a dynamic seal with the conveyance.
A system for subsea intervention operations, comprising:
- a retrievable dynamic seal assembly, comprising:
- a body;
- a tool string lock mechanism coupled to the body at a location to releasably lock the retrievable dynamic seal assembly to a tool string;
- a releasable locking mechanism positioned to lock the retrievable dynamic seal assembly in an operational position within a tubular structure at a subsea installation;
- a dynamic seal having an actuator that enables selective actuation of the dynamic seal to seal against a conveyance coupled to the tool string;
- and
- a sealing mechanism positioned to form a seal between the body and the tubular.
Dependencies are inferred from the claim text.