Well cementing methods using compositions containing liquid...

Details Well cementing methods using compositions containing liquid... Well cementing methods using compositions containing liquid...

E - Fixed Constructions

21

B

E21B 33/14 (2006.01) C04B 24/16 (2006.01) C04B 24/26 (2006.01) C09K 8/46 (2006.01)

Patent

CA 2310913

Methods of cementing subterranean zones penetrated by a well bores are provided. In accordance with the methods, a cement composition is prepared comprised of a hydraulic cement, sufficient water to form a slurry and an effective amount of a liquid fluid loss control additive comprised of an emulsion having a copolymer of N,N-dimethylacrylamide and 2-acrylamido-2-methylpropane sulfonic acid or a salt thereof contained therein. The cement composition is placed in a subterranean zone and then allowed to set into a hard impermeable mass therein.

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