Water-based drilling fluids having enhanced fluid loss control

Details Water-based drilling fluids having enhanced fluid loss control Water-based drilling fluids having enhanced fluid loss control

1977-09-19

1987-03-17

Barr, Josephine L.

Compositions

Leather or fur treating

525 545, 525344, 5253335, 252 85R, 252 8510, C09K 700

Patent

active

046505938

ABSTRACT:
A water based drilling fluid and process for using the same comprising a mixture of water and a polymer complex, wherein the polymer complex is the reaction product of a dispersant selected from the group consisting of lignite, sulfonated lignite, lignosulfonate, and sulfoalkylated lignite, and salts thereof and a water-soluble sulfonated polystyrene having a molecular weight of at least 70,000 and containing 0.7 to 2.0 sulfonic acid groups per styrene unit.

REFERENCES:
patent: 2764576 (1956-09-01), Blaser et al.
patent: 4425460 (1984-01-01), Makouashi et al.

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