Aqueous drilling fluid additive, composition and process

Details Aqueous drilling fluid additive, composition and process Aqueous drilling fluid additive, composition and process

C - Chemistry, Metallurgy

08

F

31/23, 402/410

C08F 220/56 (2006.01) C08F 220/06 (2006.01) C09K 8/24 (2006.01) E21B 21/00 (2006.01)

Patent

CA 1144298

ABSTRACT OF THE DISCLOSURE The invention relates to an aqueous drilling fluid composition, a filtration control agent for utilization in said aqueous drilling fluid, and a method of forming a filter cake on the wall of a well for the reduction of filtrate from said drilling fluid, which are ef- fective at high temperatures and pressures, by utilization of a terpolymer of: (1) a monovalent alkaline metal salt of acrylic acid; (2) an hydroxy alkyl acrylate; and (3) acrylamide.

326926

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