Well cement fluid loss additive and method

Details Well cement fluid loss additive and method Well cement fluid loss additive and method

C - Chemistry, Metallurgy

04

B

C04B 24/24 (2006.01) C04B 22/14 (2006.01) C04B 24/26 (2006.01) C04B 28/02 (2006.01) C09K 8/46 (2006.01) C09K 8/512 (2006.01) E21B 33/13 (2006.01)

Patent

CA 2042889

A fluid loss additive for addition to a cement slurry used in cementing a casing string in a wellbore. The additive reduces loss of water from the slurry into the formation, resulting in a better cement job. The additive is comprised of partially hydrolyzed polyvinyl acetate polymer, calcium sulfate, a crosslinker for the polymer, and optionally a defoamer.

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