Elongated seal assembly for sealing well tubing-to liner annulus

Details Elongated seal assembly for sealing well tubing-to liner annulus Elongated seal assembly for sealing well tubing-to liner annulus

1996-01-11

1997-03-18

Cummings, Scott

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277123, 277205, 166179, 166118, F16J 1528

Patent

active

056115474

ABSTRACT:
A seal useful for high temperature and high-differential pressures, particularly in sour gas wells, is disclosed. The preferred embodiment of the seal is an elongated member having features akin to a chevron-type seal at at least one end, coupled with at least one interference seal. A pocket is created in between these two elements which can trap atmospheric pressure, thereby enhancing the ability of downhole well fluids to compress the seal against a mandrel for facilitating its installation in a liner bore. The additional structural rigidity provided by the variety of alternative designs presented overcomes the tendency of the chevron portion of the seal to fail to seat due to downhole fluid pressures, displacing the chevron portion out of shape prior to its insertion into a liner bore.

REFERENCES:
patent: 2702220 (1955-02-01), Jonson
patent: 2704580 (1955-03-01), Brown
patent: 2704581 (1955-03-01), Potts
patent: 2841007 (1958-07-01), Loomis
patent: 3020958 (1962-02-01), Kenneday
patent: 3071960 (1963-01-01), Knapp et al.
patent: 4588030 (1986-05-01), Blizzard
patent: 5426236 (1993-09-01), Szarka et al.

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