Patent ID: 7915204
Filing Date: 2011-03-29
Classification: C09K

Abstract:
1. An aqueous composition for treating hydrocarbon wells, comprising: (a) from about 0.1 to 20 parts by weight, based on 100 parts by weight of the composition, of a scale inhibitor selected from phosphate ester scale inhibitors, phosphonic acid based scale inhibitors, phosphonocarboxylic acids, polymeric polyanionic scale inhibitors, and mixtures thereof; and (b) a viscoelastic surfactant comprising a hydrophobic moiety of alkyl, alkylarylalkyl, alkoxyalkyl, alkylaminoalkyl or alkylamidoalkyl, wherein the alkyl represents a group containing from about 16 to about 24 carbon atoms, said composition further comprising from 0 to less than 1% by weight of acid selected from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid, formic acid, acetic acid, citric acid, maleic acid, hydrofluoric acid, and mixtures thereof.