Modified surfactants, in the form of ethoxylate-coated resins (ECR), serve as the foundation for fluid loss additive systems that are functional in a wide range of applications and environments. ECR's, when combined with polyvinyl alcohol, produce fluid loss additives that: (1) are minimally retardive, (2) can be placed in turbulent flow, and (3) possess anti-gas properties. Blending ECR with hydroxyethylcellulose yields a multi-purpose fluid loss agent with higher efficiency, greater salt tolerance, and improved thermal stability as compared to conventional fluid loss additive systems.

Presented are the laboratory data substantiating the use of surfactant enhanced fluid loss additives, as well as supportive case histories demonstrating the utility of these systems in field cementing operations.

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