Crossover seal assembly

Details Crossover seal assembly Crossover seal assembly

1984-08-06

1985-12-03

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277191, F16J 1518

Patent

active

045562245

ABSTRACT:
A crossover seal assembly (44) for sealing the annulus between a well casing (16) and tubing head (22). The assembly includes spaced pairs of upper and lower metal seal rings (60 and 72, 108 and 120) having matching frusto-conical wedging surfaces (70 and 74, 118 and 122) which interact when an axial compressive force is applied to thereby effect a controlled radial expansion of the seal rings to sealingly engage the inner and outer cylindrical surfaces (48, 47) of the tubing head (22) and well casing (16). The axial compressive force is mechanically applied by a plurality of holddown lock screws (90) which interact through tapered conical tips (94) to energize the crossover seal assembly (44).

REFERENCES:
patent: 1263709 (1918-04-01), Hoke
patent: 1788966 (1931-01-01), Wilson
patent: 4039198 (1977-08-01), Stanton
patent: 4240561 (1980-12-01), Hagstrom et al.

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