Blowout preventer

Details Blowout preventer Blowout preventer

1981-07-31

1982-08-24

Spiegel, H. Jay

Valves and valve actuation

Blow-out preventers

251 5, 277 343, 277185, 277188A, 277235R, E21B 3306

Patent

active

043457355

ABSTRACT:
An oil well blowout preventer includes a radially compressible annular packing having radially-sectored end portions in a housing having axially aligned upper and lower bores communicating with the inner bore of the packing and with the sectored ends, and also includes hydraulic means for radially constricting the packing, thereby causing it to axially expand. A plurality of circumferentially-arranged rigid wedge members carried by the sectored end portions are individually movable radially into the bores to control the axial expansion whereby radial sectors of the packing may move sequentially inward to effect a seal between the upper and lower bores in response to progressive axial expansion of the packing as the packing undergoes nonuniform sector-wise radial compression. The inward radial movement of the rigid members are limited by stops to a common radial position independent of the uniformity of the radial compression. The blowout preventer effects a seal between the inner bore and the upper and lower bores regardless of the presence of an oil well tool therein.

REFERENCES:
patent: 2945665 (1960-07-01), Regan et al.
patent: 3100015 (1963-08-01), Regan
patent: 3486759 (1969-12-01), Lewis
patent: 3492007 (1970-01-01), Jones
patent: 3561723 (1971-02-01), Cugini
patent: 3614111 (1971-10-01), Regan
patent: 3737139 (1973-06-01), Watts
patent: 4098516 (1978-07-01), Murman
patent: 4099699 (1978-07-01), Allen

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