Metal and elastomer casing hanger seal

Details Metal and elastomer casing hanger seal Metal and elastomer casing hanger seal

1993-04-02

1994-10-18

Dang, Hoang G.

Wells

Processes

Placing or shifting well part

166182, 166208, 277117, 285140, E21B 3304

Patent

active

053559614

ABSTRACT:
A casing hanger seal assembly utilizes a deformable metal body and elastomeric seal rings which are O-rings. The seal rings are located in grooves in unbonded condition in the metal body. The inner wall of the metal body is tapered, matching the taper on the exterior of the casing hanger. The inner wall is sized so that it will be deformed outward as the body of the seal assembly is moved further downward. This causes the seal rings on the outer diameter of the body to engage the wellhead housing inner cylindrical wall. In a second version, the seal ring on the outer wall of the body is initially fully recessed. A deformable rib is located inward from the base of the groove. The rib presses the base of the groove outward.

REFERENCES:
patent: 4521040 (1985-06-01), Slyker et al.
patent: 4615544 (1986-10-01), Baugh
patent: 4757860 (1988-07-01), Reimert
patent: 4823871 (1989-04-01), McEver
patent: 4842061 (1989-06-01), Nobileau
patent: 4995464 (1991-02-01), Watkins et al.
patent: 5076356 (1991-12-01), Reimert
patent: 5094297 (1992-03-01), Bridges

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