Modified rotating head assembly for rotating blowout preventors

Details Modified rotating head assembly for rotating blowout preventors Modified rotating head assembly for rotating blowout preventors

1981-10-15

1984-04-10

Schwadron, Martin P.

Wells

Above ground apparatus

With seal for reciprocating member

251 1B, 277 31, 175195, 92241, E21B 3306

Patent

active

044415516

ABSTRACT:
Improvements in the rotating head assembly of a rotating blowout preventor. The rotating head assembly includes a stripper rubber which has an upper annular area attached to the lower annular end of a metal support member. The support member extends upwardly into fixed relationship respective to part of the rotating head. The stripper rubber downwardly depends into concentrically arranged, spaced annular body members. The inner annular body has an axial passageway formed therethrough for telescopingly receiving a rotating member in sealed relationship therewith. The outer annular member has an outer circumferentially extending wall surface which rotatably engages the lower marginal end of a fixed washpipe. The inner and outer annular members are made integral respective to the upper annular area of the stripper rubber, and are separated from one another by a downwardly opening annular recess. A cylindrical control sleeve is vulcanized within the outer annular member to control the deformation of the outer peripheral wall surface which engages the inner wall surface of the washpipe.

REFERENCES:
patent: 2069212 (1935-04-01), Buffington
patent: 3915426 (1975-10-01), LeRouax
patent: 4208056 (1980-06-01), Biffle
patent: 4361185 (1982-11-01), Biffle

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