Drilling fluid additives for use in hard brine environments

Details Drilling fluid additives for use in hard brine environments Drilling fluid additives for use in hard brine environments

1986-11-24

1988-05-10

Guynn, Herbert B.

Compositions

Leather or fur treating

252 8511, 252 8514, C09K 702

Patent

active

047433833

ABSTRACT:
A drilling fluid additive is disclosed which will prevent water loss into subterranean formations during the drilling of oil and gas wells in hard brine environments. The drilling fluid additive comprises a hydrocarbon, an anionic surfactant, an alcohol, a sulfonated asphalt, a biopolymer, and optionally an organophilic clay, poly(N-vinyl-2-pyrrolidone-co-sodium-2-acryamido-2-methylpropane sulfonate, and water.

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