DISPERSANT AND FLUID LOSS CONTROL ADDITIVES FOR WELL CEMENTS, WELL CEMENT COMPOSITIONS AND METHODS

摘要

Biodegradable dispersant and fluid loss control additives for well cements, well cement compositions including the additives and methods of using the well cement compositions are provided. The well cement compositions are basically comprised of a hydraulic cement, water in an amount sufficient to form a slurry and a dispersant and fluid loss control additive comprised of casein. A second fluid loss control agent can optionally also be included in the additive.