Polymeric annular snubbing apparatus

Details Polymeric annular snubbing apparatus Polymeric annular snubbing apparatus

1983-10-12

1984-11-06

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 5, 277193, 277228, 277 1, 308 4A, 166173, 166176, F16J 1510, F16C 2900

Patent

active

044808437

ABSTRACT:
For use in hydraulic workover operations for oil and gas wells, a snubbing element is provided that is made entirely of polymeric material such as polyurethane. According to a preferred embodiment of the invention, the strength and rigidity supplied to the snubbing element in the prior art metallic support ring is now provided by molding that portion of the polymeric annular snubbing element from a polymeric material having a higher density and hardness than that of the polymeric sealing member. The polymeric annular snubbing element thus comprises a high density polymeric support member and a relatively lower density polymeric sealing member.

REFERENCES:
patent: 870616 (1907-11-01), Brazelle
patent: 3608633 (1971-09-01), Talley
patent: 4190300 (1980-02-01), Scalzi
patent: 4345769 (1982-08-01), Johnston
patent: 4361185 (1982-11-01), Biffle

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