Non-retarding fluid loss additives for well cementing compositio

Details Non-retarding fluid loss additives for well cementing compositio Non-retarding fluid loss additives for well cementing compositio

1984-12-19

1986-07-29

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

106 90, 166295, 523130, E21B 33138

Patent

active

046026851

ABSTRACT:
A well bore cementing composition and method are shown in which a hydraulic cement, water and a non-retarding fluid loss additive are combined to form a cementing slurry. The non-retarding fluid loss additive is a copolymer of a first non-ionic water soluble monomer which resists hydrolyzing in a cement slurry and a second anionic monomer. The monomer ratio of the non-ionic, water soluble monomer to the anionic monomer is in the range from about 85:15 to 95:5, and the copolymer has a molecular weight in the range from about 200,000 to 400,000.

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