Tubing hanger with shiftable annulus seal
AssigneeDril-Quip, Inc.
InventorChris D. Bartlett
Life of this patent
Estimating the term…
Abstract
A tubing: hanger assembly with a shiftable annulus seal is provided. The shiftable annulus seal allows for selectively sealing the tubing hanger within a easing hanger, a wellhead, or a tubing head. The tubing hanger assembly also includes a secondary annulus flow path formed through the body of the tubing hanger. The shiftable annulus seal selectively opens/closes a relatively large flow path to the tubing string annulus for circulation of fluid through the tubing string and setting a-packer. The secondary annulus flow path facilitates monitoring and bleeding of pressure front the annulus after the shiftable annulus seal is closed.
Claims20
A system, comprising:
- a tubing hanger comprising a shiftable annulus seal assembly configured to be axially shifted between a first position where the shiftable annulus seal assembly blocks a first annulus flow path around a main body of the tubing hanger and a second position where the first annulus flow path is open;
- wherein the tubing hanger further comprises a second annulus flow path extending through the main body of the tubing hanger.
A method, comprising:
- landing a tubing hanger in a casing hanger, wellhead, or tubing head, wherein the tubing hanger comprises:
- a main body;
- a shiftable annulus seal assembly;
- and
- a secondary annulus flow path extending through the main body of the tubing hanger;
- maintaining the shiftable annulus seal assembly in a first position to keep the a first annulus flow path open around the main body of the tubing hanger;
- and
- axially shifting the shiftable annulus seal assembly from the first position to a second position in which the shiftable annulus seal assembly blocks the first annulus flow path.
Dependencies are inferred from the claim text.