CEMENT COMPOSITION EXHIBITING IMPROVED RESILIENCE/TOUGHNESS AND METHOD FOR USING SAME

摘要

A cement composition for use in borehole applications comprising hydraulic cement, sufficient water to form a slurry, and an effective amount of a resilience/toughness enhancing additive comprising a thermoplastic block copolymer having a tensile strength of from 500 to 4000 psi, a recoverable elongation of 200 to 1000 percent and exhibiting temperature stability in the range of 30° to 500°F, the cement composition being useful for forming seals at desired locations in wellbores or formations penetrated by wellbores by placing the composition in the desired location and permitting the composition to set.