Rotating blowout preventor with adaptor

Details Rotating blowout preventor with adaptor Rotating blowout preventor with adaptor

1981-02-23

1983-08-16

Leppink, James A.

Wells

Above ground apparatus

Central valve or closure and lateral port

166 82, 166 84, 277 31, E21B 33068, E21B 3306

Patent

active

043985998

ABSTRACT:
A rotating blowout preventor apparatus includes an adaptor located at the upper end of a main body, and a rotating head assembly which is removably received by the adaptor. The adaptor is longitudinally split to provide two segmented circles which are hinged together, and which may be opened to thereby enable a very large bit to be received within the main body. The rotating head assembly is left affixed to the drill string, with the bit located in underlying position respective to the rotating head assembly. Relatively small rotating blowout preventors can accommodate extremely large drill bits by utilizing the present invention.

REFERENCES:
patent: 4154448 (1979-05-01), Biffle
patent: 4157186 (1979-06-01), Murray et al.
patent: 4293047 (1981-10-01), Young
patent: 4312404 (1982-01-01), Morrow

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