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US 10,538,988 B2Granted
Expandable downhole seat assembly
AssigneeSchlumberger Technology Corporation
InventorJahir Pabon
Life of this patent
Estimating the term…
Abstract
An apparatus that is usable with a well includes an inner ring, an outer ring and a tool assembly. The inner ring includes a seat to receive an untethered object; the outer ring is concentric with the inner ring; and the tool assembly, downhole in the well, engages the outer ring with the inner ring to press the outer ring into a wall of a tubing string to secure the outer ring to the tubing string.
Claims18
A method usable with a well, comprising:
- deploying an assembly into a previously installed tubing string, the assembly comprising a first ring and a second ring concentric with the first ring,
- engaging the first ring with the second ring to press the first ring into the tubing string to secure the assembly to the string,
- wherein an inner surface of the first ring and an outer surface of the second ring comprise contacting mating surfaces having a same conical angle, and
- wherein a friction coefficient between the inner surface of the first ring and the outer surface of the second ring is greater than a tangent of the conical angle;
- receiving an untethered object in a seat of the second ring to form a fluid barrier;
- and
- using the fluid barrier to perform a downhole operation.
4 more elements
An apparatus usable with a well, comprising:
- an inner ring comprising a seat to receive an untethered object;
- an outer ring concentric with the inner ring,
- wherein an inner surface of the outer ring and an outer surface of the inner ring comprise contacting mating surfaces having a same conical angle, and
- wherein a friction coefficient between the inner surface of the outer ring and the outer surface of the inner ring is greater than a tangent of the conical angle;
- and
- a tool assembly to, downhole in the well, engage the outer ring with the inner ring to press the outer ring into a wall of a tubing string to secure the outer ring to the tubing string.
3 more elements
A system usable with a well, comprising:
- a tubing string;
- and
- an assembly comprising a setting tool and an expandable downhole seat assembly,
- wherein:
- the downhole seat assembly is adapted to be run downhole inside a central passageway of the tubing string in a radially contracted state of the downhole seat assembly;
- the downhole seat assembly comprises a monolithic inner ring and an outer segmented ring assembly concentric with the inner ring;
- the setting tool assembly is adapted to axially translate the monolithic inner ring into the outer segmented ring assembly to, downhole in the well, radially expand the outer segmented ring assembly to secure the downhole seat assembly to the tubing string,
- wherein an inner surface of the outer segmented ring assembly and an outer surface of the monolithic inner ring comprise contacting mating surfaces having a same conical angle, and
- wherein a friction coefficient between the inner surface of the outer segmented ring assembly and the outer surface of the monolithic inner ring is greater than a tangent of the conical angle;
- and
- the monolithic inner ring comprises a seat to receive an untethered object to form a downhole fluid barrier in the tubing string.
8 more elements
Dependencies are inferred from the claim text.