Methods of generating gas in well fluids
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United States of America Patent
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Apr 6, 2004
Grant Date -
Dec 4, 2003
app pub date -
May 31, 2002
filing date -
May 31, 2002
priority date (Note) -
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Abstract
Improved methods of generating gas in and foaming aqueous well fluids introduced into a subterranean zone are provided. A method of the invention includes the steps of combining with an alkaline aqueous well fluid one or more gas generating chemicals and a mixture of foaming and foaming stabilizing surfactants so that the gas generating chemical or chemicals react with the alkaline aqueous well fluid and gas and foam are formed in the well fluid while it is being pumped, and then pumping the well fluid into the subterranean zone.
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