Fluid loss control additives for oil wells cementing...

Details Fluid loss control additives for oil wells cementing... Fluid loss control additives for oil wells cementing...

E - Fixed Constructions

21

B

31/23

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

Patent

CA 1314391

FLUID LOSS CONTROL ADDITIVES FOR OIL WELL CEMENTING COMPOSITIONS Abstract of the Disclosure A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a copolymer of acrylamide/vinyl imidazole and derivatives thereof in a weight percent ratio of from about 95:5 to 5:95, said copolymer having a molecular weight range of from about 100,000 to 3,000,000. The composition can also optionally include a dispersant such as sodium or potassium salts or a sulfonated naphthalene formaldehyde condensate.

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