Method for stimulation of oil and gas wells
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United States of America Patent
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Dec 12, 1989
Grant Date -
N/A
app pub date -
Oct 9, 1987
filing date -
Oct 9, 1987
priority date (Note) -
Expired
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Abstract
A method for the removal of scale from the interior of producing oil and gas wells is disclosed. The method comprises introducing a mixture of an aqueous mineral acid, a mutual solvent, and an alkyl or aralkyl polyoxyalkylene phosphate ester to the interior of the well. The phosphate ester maintains the acid and mutual solvent in a micellar emulsion state. The mixture is retained in the well to allow the acid to solubilize the mineral deposits and then the mixture and solubilized mineral deposits are removed from the well interior.
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