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US 7,008,477 B2Granted
Foamed cement slurries, additives and methods
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, Bobby J. King, Roger S. Cronwell, D. Chad Brenneis, Dennis W. Gray
Life of this patent
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Abstract
The present invention relates to foamed cement slurries, additives and methods. A foamed cement slurry of the invention comprises a hydraulic cement, sufficient water to form a slurry, sufficient gas to form a foam and an environmentally benign foaming and stabilizing additive comprising a mixture of an ammonium salt of an alkyl ether sulfate surfactant, a cocoamidopropyl hydroxysultaine surfactant, a cocoamidopropyl dimethylamine oxide surfactant, sodium chloride and water.
Claims14
A foamed cement slurry comprising:
- a hydraulic cement;
- sufficient water to form a slurry;
- sufficient gas to form a foam;
- and
- a foaming and stabilizing additive comprising a mixture of an ammonium salt of an alkyl ether sulfate surfactant, cocoamidopropyl hydroxysultaine surfactant, cocoamidopropyl dimethylamine oxide surfactant, sodium chloride and water.
2 more elements
A foamed cement slurry comprising:
- a hydraulic cement;
- water present in an amount in the range of from about 35% to about 70% by weight of hydraulic cement therein;
- gas present in the range of from about 10% to about 80% by volume of the cement slurry;
- a foaming and stabilizing additive comprising a mixture of an ammonium salt of an alkyl ether sulfate surfactant, cocoamidopropyl hydroxysultaine surfactant, cocoamidopropyl dimethylamine oxide surfactant, sodium chloride and water.
1 more element
Dependencies are inferred from the claim text.