Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1983-07-26
1985-12-24
Ward, Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277115, 277118, 277124, F16J 1524
Patent
active
045601763
ABSTRACT:
A stuffing box for use in oil and gas wells having improved sealing. A plurality of ring-like packing glands each has an outer surface defining an inverted frusto-conical shape and a bore therethrough also defining an internal inverted frusto-conical surface whereby the glands nest upon one another in cup-like fashion. A ring-like seal seat also has a bore forming an inverted frustco-conical inner surface which, in assembly, carries the nested glands. The inner wall of a stuffing box body defines a cavity which contains the assembly, the seat thereof being carried by a lower shoulder portion defined by the body. A cylindrical gland cap has a lower gland follower edge portion which exerts downward pressure on the end of the uppermost gland. The vertical bore through the body, seat, glands, and gland cap is adapted to receive a vertical reciprocating polished rod in coaxial alignment therewith whereby the downward pressure of the gland follower effects sealing of the inner and outer surfaces of the glands to the rod and to the inner wall of the body, respectively. Sealing is pressure-enhanced by borehole pressure, and any misalignment of the rod is compensated for by providing for horizontal movement of the seat, glands, and gland cap relative to the box.
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Carwell Robert M.
Flanders Harold H.
Horn Alec H.
J. M. Huber Corporation
Ward Robert S.
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