초록

A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, an acid and an alkyl alcohol.

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[ What is claimed is:] [1.] A surfactant composition for cleaning wellbore and flowline surfaces consisting essentially of an aqueous solution containing:a) an acidic material consisting of about 1.0 to about 30.0 weight percent of an organic acid selected from the group consisting of acetic, formic

[ What is claimed is:] [1.] A surfactant composition for cleaning wellbore and flowline surfaces consisting essentially of an aqueous solution containing:a) an acidic material consisting of about 1.0 to about 30.0 weight percent of an organic acid selected from the group consisting of acetic, formic, propionic and citric acids or about 0.5 to about 15.0 weight percent of hydrochloric acid; and,b) about 0.25 to about 10.0 weight percent of an alkyl polyglycoside surfactant selected from alkyl polyglycosides containing alkyl groups containing from about 9 to about 16 carbon atoms and mixtures thereof;c) about 0.25 to about 10.0 weight percent of an ethoxylated alcohol selected from the group consisting of ethoxylated alkyl alcohols containing from about 6 to about 16 carbon atoms in the alkyl alcohol and from about 2.5 to about 6 ethylene oxide groups and mixtures thereof;d) about 0.1 to about 6.0 weight percent of at least one alkyl alcohol containing from about 4 to about 8 carbon atoms.