Foamed well cement slurries, additives and methods
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United States of America Patent
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May 16, 2000
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app pub date -
Apr 19, 1999
filing date -
Apr 19, 1999
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Abstract
The present invention provides improved foamed well cement slurries, additives and methods. The additives, which foam and stabilize a cement slurry containing fresh water or salt water, are basically comprised of a mixture of an ethoxylated alcohol ether sulfate surfactant, an alkyl or alkene amidopropyl betaine surfactant and an alkyl or alkene amidopropyl dimethyl amine oxide surfactant.
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