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US 2017/0254166 A1Published application
Well Assembly with Self-Adjusting Lockdown Assembly
AssigneeOneSubsea IP UK Limited
InventorBenjamin Scott Berryhill
Life of this patent
Estimating the term…
Abstract
A self-adjusting lockdown assembly for engaging and/or preloading a tubular hanger to an interior of a wellhead housing. The lockdown assembly includes a support sleeve, a body received in the support sleeve, an elevator ring coaxially engaged with the support sleeve, a lock ring engaged with the elevator ring, and an actuator sleeve configured to move axially between the body and the elevator ring so as to adjust the position of the lock ring.
Claims20
A well system, comprising:
- a housing;
- and
- a lockdown assembly engageable with a tubular hanger and an interior of the housing, comprising:
- a support sleeve;
- a body received in the support sleeve;
- an elevator ring engaged with the support sleeve;
- a lock ring engaged with the elevator ring;
- and
- an actuator sleeve configured to move axially between the body and the elevator ring so as to adjust the position of the lock ring.
6 more elements
A method of installing a lockdown assembly in a wellhead housing, comprising:
- moving an actuator sleeve axially between a lock ring and a body in a first direction so as to radially expand the lock ring;
- raising the lock ring axially opposite the first direction by rotating an elevator ring with the axial movement of the actuator sleeve;
- and
- continuing to move the actuator sleeve to expand and raise the lock ring into locking engagement with the wellhead housing.
1 more element
A lockdown assembly, comprising:
- a cylindrical cam;
- a follower engaged with the cylindrical cam;
- a lock ring configured to move with the follower;
- and
- an actuator sleeve configured to move axially in the lock ring and the follower so as to adjust the position of the lock ring.
2 more elements
Dependencies are inferred from the claim text.