Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1981-09-25
1983-05-24
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
F16J 1506, F16L 2500
Patent
active
043847307
ABSTRACT:
A wellhead sealing assembly comprising a metallic sealing ring (10) which is compressed and deformed by tubing hanger load and fluid pressure to establish metal-to-metal sealing contact with the tubing hanger (20) and the tubing head (30). The outer surface of the sealing ring includes an upper cylindrical surface (11) and a lower downward facing frusto-conical surface (16) which coact respectively, with the bore wall of the tubing head (30) and an upward facing frusto-conical shoulder (33) in the tubing head bore (32). It is also provided with an annular end surface (13) which is radially transverse to the ring axis and coacts with a corresponding downward facing shoulder (22) on the tubing hanger (20) which seats thereagainst. The metallic ring (10) also comprises inner annular surfaces in the form of an upward facing frusto-conical surface (15) and a lower cylindrical surface (12) which coacts respectively with a downward facing frusto-conical surface (23) and a cylindrical surface (24) on a reduced diameter section of the tubing hanger. When the tubing hanger is seated on the upper end surface (13) of the sealing ring (10), there is a 5.degree. difference in the angles of taper between the inner frusto-conical surface (15) of the sealing ring (10) and the outer frusto-conical surface (23) of the tubing hanger (20) with the two frusto-conical surfaces contacting only at their upper extremities. When compression loads are applied, the sealing ring is compressed and deformed radially to coact and establish sealing metal-to-metal contact with the bore (32) of the tubing head (30) and the external tapered and cylindrical surfaces (23, 24) of the tubing hanger 20.
REFERENCES:
patent: 2046579 (1936-07-01), Penick et al.
patent: 2397749 (1946-04-01), Mendelson
patent: 2744651 (1956-05-01), Bredtschneider
patent: 3104121 (1963-09-01), Nordin et al.
patent: 3166345 (1965-01-01), Pinkard
patent: 3354462 (1967-11-01), Pierce
patent: 3567258 (1971-03-01), Scaramucci
patent: 4190270 (1980-02-01), Vanderford
patent: 4299332 (1981-11-01), Pechacek
Marnock Marvin J.
Smith Robert I.
W-K-M Wellhead Systems, Inc.
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