High temperature dispersant

Details High temperature dispersant High temperature dispersant

1982-05-26

1984-10-09

Guynn, Herbert B.

Compositions

Leather or fur treating

C09K 702

Patent

active

044760299

ABSTRACT:
Improved dispersants are disclosed for water-based bentonite clay drilling fluids containing a waterloss controller and a weighting agent. The dispersant can be a polyacrylic acid having a molecular weight of from about 700 to about 50,000 and preferably about 4,000 to about 8,000 or it can be used in combination with a sulfonated polystyrene-maleic anhydride copolymer. The dispersants are able to be used at temperatures from about 70.degree. F. up to 500.degree. F.

REFERENCES:
patent: 2552775 (1951-05-01), Fischer et al.
patent: 3123559 (1964-03-01), Fischer
patent: 3730900 (1973-05-01), Perricone et al.
patent: 3764530 (1973-10-01), Burland et al.
Technical Data-Oil Services Division, Bulletin OSD 1012, pub. by Allied Colloids Inc.

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