Control of gas flow through cement column
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United States of America Patent
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Mar 31, 1992
Grant Date -
N/A
app pub date -
Mar 26, 1991
filing date -
Mar 26, 1991
priority date (Note) -
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Abstract
This invention involves cementing compositions for the oil industry and their use in cementing wells. More specifically, this invention involves the control of the gas migration or gas channeling phenomenon that occurs during the setting of a cement slurry. A cementing composition, capable of inhibiting gas channeling, comprised of gaseous fluid, hydraulic cement, and a gas channeling inhibiting additive comprised of a copolymer 2-acrylamido-2 methylpropane-3-sulphonic acid, N-vinylacylamide and acrylamide, is provided.
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