Casing hanger seal assembly with diverging taper

Details Casing hanger seal assembly with diverging taper Casing hanger seal assembly with diverging taper

1989-08-18

1990-10-02

Britts, Ramon S.

Wells

Expansible anchor or casing

Liner hanger

166217, 285145, 285348, E21B 3304

Patent

active

049601725

ABSTRACT:
A seal assembly for a casing hanger utilizes diverging tapered surfaces. The casing hanger locates within a wellhead housing. The casing hanger has an outer wall spaced inward from an inner wall of the wellhead housing, defining an annular clearance. At least one of the inner or outer walls has a tapered or conical sealing section. The taper is downward, resulting in increased radial width of the annular clearance in a downward direction. A metal packoff locates in the annular clearance. The packoff has inner and outer legs which are spread apart by means of an energizing ring. The legs seal against the casing hanger outer wall and wellhead housing inner wall.

REFERENCES:
patent: 2714932 (1955-08-01), Thompson
patent: 2805723 (1957-09-01), Young
patent: 4665979 (1987-05-01), Boehm
patent: 4722391 (1988-02-01), Brammer
patent: 4742874 (1988-05-01), Gullion
patent: 4766956 (1988-08-01), Smith et al.

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