Rotating blowout preventers

Details Rotating blowout preventers Rotating blowout preventers

1983-07-07

1985-07-30

Novosad, Stephen J.

Wells

Above ground apparatus

With seal for reciprocating member

166 95, 251 11, 277 31, E21B 3306

Patent

active

045315809

ABSTRACT:
An improved rotating blowout preventer having a sealing assembly which is latched in place in a body with an upper latch engaging the non rotating body and lower latch engaging in a groove to engage the rotating portion, a sealing assembly having an improved elongate flexible tubular sealing element for sealing against a rotating Kelly or other element and being sufficient long and resilient to seal under conditions of lateral misalignment without interfering with the rotation and an improved support system which maintains a predetermined bearing load and transfers excess loads to the body.

REFERENCES:
patent: 4098516 (1978-07-01), Murman
patent: 4143880 (1979-03-01), Bunting et al.
patent: 4208056 (1980-06-01), Biffle
patent: 4312404 (1982-01-01), Morrow
patent: 4367795 (1983-01-01), Biffle
patent: 4423776 (1984-01-01), Wagoner et al.
patent: 4441551 (1984-04-01), Biffle
patent: 4448255 (1984-05-01), Shaffer et al.

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