CEMENT COMPOSITIONS WITH IMPROVED FLUID LOSS CHARACTERISTICSAND METHODS OF CEMENTING IN SURFACE AND SUBTERRANEAN APPLICATIONS

摘要

The present invention provides cement compositions comprising an improved fluid loss control additive, and methods for cementing using such cement compositions. Exemplary embodiments of the cement compositions comprise a hydraulic cement, water, and a fluid loss control additive comprising an acrylamide copolymer derivative, a dispersant, and a hydratable polymer. Optionally, other additives suitable for inclusion in cement compositions ma y be added.