Rotating blowout preventor with rigid washpipe

Details Rotating blowout preventor with rigid washpipe Rotating blowout preventor with rigid washpipe

1977-10-18

1979-05-15

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

251 1B, 277 2, F16J 1556, E21B 3303

Patent

active

041544480

ABSTRACT:
A rotating blowout preventor of simplified construction which requires no kelly drive bushing, and which has a rotating external housing formed at the upper marginal end thereof within which the main bearings and seals are isolated. The external housing rotates about a fixed washpipe and supports a stripper seal doughnut to which a stripper seal is mounted in underlying relationship thereto. A removal clamp enables the doughnut and stripper rubber to be lifted free of the assembly for service or replacement. The bearing housing is fabricated in a manner to enable servicing the seals and bearings thereof without removing the blowout preventor from the top of a tool string. The bearing housing and seals therefore are arranged respective to the rotating stripper rubber such that should leakage across the stripper rubber and seal occur, the isolated bearing housing will be maintained free of contamination therefrom.

REFERENCES:
patent: 2071197 (1937-02-01), Burns et al.
patent: 2303090 (1942-11-01), Pranger et al.
patent: 3387851 (1968-06-01), Cugini

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