Hydrolytically stable polymers for use in oil field...

Details Hydrolytically stable polymers for use in oil field... Hydrolytically stable polymers for use in oil field...

E - Fixed Constructions

21

B

31/23

E21B 33/13 (2006.01) C04B 24/16 (2006.01) C09K 8/46 (2006.01)

Patent

CA 1228723

ABSTRACT Cementing compositions and methods of using such compositions in oil, gas and water well cementing operations to reduce fluid loss from the composition to the formation are disclosed. Such compositions incorporate certain copo- lymers of N, N dimethylacrylamide and 2-acrylamido, 2-methyl propane sulfonic acid having mole ratios of between 1:4 and 4:1 respectively and average molecular weights of between about 75,000 and about 300,000. 21

471431

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