Am/amps fluid loss additive blend for well cementing...

Details Am/amps fluid loss additive blend for well cementing... Am/amps fluid loss additive blend for well cementing...

E - Fixed Constructions

21

B

31/23

E21B 33/14 (2006.01) C04B 24/16 (2006.01) C04B 24/26 (2006.01) C04B 28/02 (2006.01) C09K 8/46 (2006.01)

Patent

CA 1246853

ABSTRACT An additive blend for a well cementing composition is shown which comprises a copolymer of acrylamide and 2- acrylamido-2-methylpropane sulfonate, the sodium salt of naphthalene formaldehyde sulfonate, and polyvinyl- pyrrolidone polymer. The fluid loss additive is mixed together with a hydraulic cement and water in an amount to produce a pumpable slurry. The cement slurry is pumped to the desired location in the wellbore and allowed to harden to a solid mass.

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