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

1985-08-30

1987-03-24

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 545, 523130, 523131, 252 855R, 252 851, 252 8551, C08G 8100, C08G 8300

Patent

active

046526064

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: Re29595 (1978-03-01), Adams et al.
patent: 3234154 (1966-02-01), Martin
patent: 4503170 (1985-03-01), Drake et al.
patent: 4514308 (1985-04-01), Clampitt et al.

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