Composition for blowout preventer

Details Composition for blowout preventer Composition for blowout preventer

1983-03-29

1984-02-14

Marquis, Melvyn I.

Stock material or miscellaneous articles

Composite

Of silicon containing

251 1R, 251 1A, 251 1B, 277 73, 277126, 277127, 277129, 277185, 277188A, 277199, 277235R, 428457, 428462, 523130, 524322, 524432, 524566, E21B 3306, C08K 304, C08K 336

Patent

active

044317042

ABSTRACT:
A rubber composition for use in annular packer elements for blowout preventers is provided which comprises from about 45 to about 55 weight percent of an acrylonitrile-butadiene copolymer; from about 10 to about 15 weight percent of a first admixture further comprising a major amount of colloidal silica and minor effective amounts of coupling agent, curative, lubricant, dispersant, activator and antiscorching agent; from about 30 to about 40 weight percent of a second admixture further comprising a major amount of carbon black and minor effective amounts of a plasticizer, antioxidant and antiozonant; and minor effective amounts of tetraethyl thiuram disulfide and benzothiazyl disulfide.

REFERENCES:
patent: 3897039 (1975-07-01), Le Rouay
patent: 4089532 (1978-05-01), Kamyshnikov et al.
patent: 4323256 (1982-04-01), Miyagishima et al.
patent: 4339359 (1982-07-01), Bezwada
patent: 4345735 (1982-08-01), Regan
patent: 4358085 (1982-11-01), Regan

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