Variable bore packer for a ram-type blowout preventer

Details Variable bore packer for a ram-type blowout preventer Variable bore packer for a ram-type blowout preventer

1992-10-13

1994-03-15

Fox, John C.

Valves and valve actuation

Blow-out preventers

Radial reciprocating ram

277129, E21B 3306

Patent

active

052940888

ABSTRACT:
The variable bore packer for a ram-type blowout preventer includes a body of resilient packing material with upper and lower plates embedded in the upper and lower surfaces of the body and upper and lower sets of insert segments disposed adjacent the upper and lower plates. The plates have arcuate radial corners at their terminal ends for preventing extrusion. Each of the insert segments includes a pair of insert plates forming an arcuate opening to receive an appropriate sized tubular member and dimensioned to expand and move rearwardly in the resilient packing material upon engagement with a larger diameter tubular member. A polyester rope is embedded in the resilient packing material adjacent the insert segments so as to bond with the resilient packing material. The rope prevents extrusion of the resilient packing material through the gaps between the insert segments and the exterior of the tubular member and also provides reinforcement of the resilient packing material upon the expansion of the resilient packing materials to accommodate larger diameter tubular members.

REFERENCES:
patent: 4323256 (1982-04-01), Miyagishima et al.
patent: 4398729 (1983-08-01), Bishop et al.
patent: 4428592 (1984-01-01), Shaffer
patent: 4456215 (1984-06-01), Bishop et al.
patent: 4506858 (1985-03-01), Gentry
patent: 4553730 (1985-11-01), Vicic
patent: 5005802 (1991-04-01), McWhorter et al.
patent: 5009289 (1991-04-01), Nance
Cameron Oil Tools; Choose Your Weapons. New B.O.P. Rams From Cameron Give You The Upper Hand When The Pressure's On.; 1978; 8 pgs.
Cooper Oil Tool; The Cameron FLEXPACKER.RTM. Ram; 1992 Cooper Industries, Cooper Oil Tool Division, 1992; 4 pgs.
Cameron Today's solutions, tomorrow's standards. Introducing CAMRAM.RTM. A Major Breakthrough in Ram Packer Technology; Sep. 1987; 6 pgs.

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