Method for removal of paraffin from producing oil wells
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United States of America Patent
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Mar 21, 1989
Grant Date -
N/A
app pub date -
Sep 17, 1987
filing date -
Sep 17, 1987
priority date (Note) -
Expired
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Abstract
A method for removing paraffin from a producing oil well comprising (a) contacting a mixture of a paraffin-dispersing effective amount of an alkyl or aralkyl polyoxyalkylene phosphate ester surfactant in the free acid form, or in the form of the alkali metal, amine, or ammonium salt, a mutual solvent and water, said mixture having a temperature of from about 30.degree. to 40.degree. F. higher than the melting point of the paraffin to be removed, with the interior of the oil well for a period of time sufficient to disperse paraffin within the well into the mixture; and (b)removing the mixture and the paraffin dispersed therein from the interior of the well.
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