Rotary blowout preventer

Details Rotary blowout preventer Rotary blowout preventer

1982-08-17

1984-05-15

Purser, Ernest R.

Wells

Processes

Placing or shifting well part

251 1B, 277 31, 175195, 166 84, E21B 3306

Patent

active

044482558

ABSTRACT:
A rotary blowout preventer having a radially compressible packing to be sealingly engaged with and rotated by a drill pipe or kelly and a hydraulically actuated wedging piston for compressing the packing is provided with a rotatable bearing support which in an exemplary embodiment includes an inverted truncated cone interposed between the packing and the piston, which is rotatably mounted to the piston by a plurality of bearing races, along with a thrust bearing interposed between the packing and the housing enable the packing to rotate relative to the housing and prevents upward axial motion of the packing.

REFERENCES:
patent: 2051261 (1936-08-01), MacClatchie
patent: 2731281 (1956-01-01), Knox
patent: 3023012 (1962-02-01), Wilde
patent: 3128614 (1964-04-01), Auer
patent: 3492007 (1970-01-01), Jones
patent: 3587734 (1971-01-01), Shaffer
patent: 4098341 (1978-07-01), Lewis

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