Cement composition exhibiting improved resilience/toughness and method for using same
AssigneeHalliburton Energy Services, Inc.
InventorsKrishna M. Ravi, B. Raghava Reddy, Rickey L. Morgan
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Abstract
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.
Claims25
A cement composition comprising:
- a hydraulic cement;
- sufficient water to form a slurry;
- and
- an effective amount of a resilience/toughness enhancing additive comprising a uniformly dispersed thermoplastic block copolymer.
A cement composition comprising:
- a hydraulic cement;
- sufficient water to form a slurry;
- and
- an effective amount of a resilience/toughness enhancing additive comprising a uniformly dispersed thermoplastic block copolymer having a tensile strength of from about 500 to about 4000 psi, a recoverable elongation of about 200 to about 1000 percent and temperature stability in the range of about 30° to about 500° F.
A method of cementing in a subterranean formation comprising:
- placing a composition comprising a hydraulic cement and an effective amount of a generally uniformly dispersed resilience/toughness enhancing additive comprising a thermoplastic block copolymer in the subterranean formation;
- and
- permitting the composition to set therein;
- wherein the set composition comprises a hardened cement that comprises a generally uniform dispersion of the resilience/toughness enhancing additive.
A method of cementing in a subterranean formation comprising:
- placing a composition comprising a hydraulic cement and an effective amount of a generally uniformly dispersed resilience/toughness enhancing additive comprising a thermoplastic block copolymer in the subterranean formation;
- and
- permitting the composition to set therein;
- wherein the set composition comprises a hardened cement that comprises a generally uniform dispersion of the resilience/toughness enhancing additive;
- and
- wherein the thermoplastic block copolymer has a tensile strength of from about 500 to about 4000 psi, recoverable elongation of about 200 to about 1000 percent and exhibits temperature stability in the range of about 30° to about 500° F.
Dependencies are inferred from the claim text.