Fluid loss control additives for oil well cementing compositions

Details Fluid loss control additives for oil well cementing compositions Fluid loss control additives for oil well cementing compositions

1989-08-07

1990-06-12

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 2, 524401, 524458, 524555, C09K 700

Patent

active

049333780

ABSTRACT:
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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