Fluid loss additives for cementing compositions

Details Fluid loss additives for cementing compositions Fluid loss additives for cementing compositions

1991-12-23

1993-06-08

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106727, 106822, 106823, 166293, 166294, 166295, C04B 2412

Patent

active

052175316

ABSTRACT:
Disclosed are cementing compositions and methods of using wherein the cementing compositions comprise: (a) aqueous solution, (b) hydraulic cement, (c) a N-vinylpyrrolidone-acrylamide random copolymer, and (d) a sulfonate containing cement dispersant. The copolymer is present in the composition in an amount of from 0.05 to 5.0 weight percent based on the weight of dry cement. Use of the present invention as a fluid loss additive will result in significant reductions in water loss rate.

REFERENCES:
patent: 3415319 (1968-12-01), Gibson
patent: 3994852 (1976-11-01), Adams et al.
patent: 4480693 (1984-11-01), Newlove et al.
patent: 4587283 (1986-05-01), Hille et al.
patent: 4602685 (1986-07-01), McKenzie et al.
patent: 4659750 (1987-04-01), Sedillo et al.

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