Polyimide quaternary salts as clay stabilization agents
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United States of America Patent
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Nov 3, 1992
Grant Date -
N/A
app pub date -
May 25, 1990
filing date -
May 25, 1990
priority date (Note) -
Expired
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Abstract
A clayish formation, such as encountered in rock surrounding an oil well bore, is stabilized with a quaternary ammonium salt of an imide of polymaleic anhydride. The invention is particularly relevant to hydraulic fracturing fluids used for enhanced oil recovery.
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