Annular blowout preventer

Details Annular blowout preventer Annular blowout preventer

1981-12-29

1984-07-17

Schwadron, Martin P.

Valves and valve actuation

Blow-out preventers

251212, 277103, 277188A, 277235R, E21B 3306

Patent

active

044601514

ABSTRACT:
An annular blowout preventer having a housing with a vertical bore therethrough, a packer within the housing including a resilient annulus and upper and lower series of irising metal inserts adapted to increase the support for the annulus when it is deformed axially and extended radially to constrict the vertical bore, a support ring in the annulus under the outer ends of the irising metal inserts to support against upward movement of the inner ends of the inserts on closing of the annulus and an annular piston movable in the housing to apply an axial deformation load to the packer to move it to closed position sealing the bore.

REFERENCES:
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patent: 2812197 (1957-11-01), Gibson
patent: 2846178 (1958-08-01), Minor
patent: 3572627 (1971-03-01), Jones et al.
patent: 3572628 (1971-03-01), Jones
patent: 3667721 (1972-06-01), Vujasinovic
patent: 3897071 (1975-07-01), LeRovax
patent: 3915426 (1975-10-01), LeRovax
patent: 3994472 (1976-11-01), Williams
patent: 4007904 (1977-02-01), Jones
patent: 4092010 (1978-05-01), Carlson, Jr.
patent: 4099699 (1978-07-01), Allen
patent: 4310139 (1982-01-01), Williams, III et al.

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