초록 ▼

The present invention relates to a method of acidizing a subterranean formation or well bore employing an acidic solution containing a corrosion inhibitor composition comprising an inhibiting effective amount of an acetylenic alcohol, a quaternary ammonium compound, an aromatic hydrocarbon and an an

The present invention relates to a method of acidizing a subterranean formation or well bore employing an acidic solution containing a corrosion inhibitor composition comprising an inhibiting effective amount of an acetylenic alcohol, a quaternary ammonium compound, an aromatic hydrocarbon and an antimony compound.

대표청구항 ▼

A method of acidizing a subterranean formation penetrated by a ferrous metal well bore whereby corrosive effects of an acidic solution on ferrous metals in contact with said acidic solution is minimized which comprises: contacting said formation with an aqueous acidic solution comprising hydrochlori

A method of acidizing a subterranean formation penetrated by a ferrous metal well bore whereby corrosive effects of an acidic solution on ferrous metals in contact with said acidic solution is minimized which comprises: contacting said formation with an aqueous acidic solution comprising hydrochloric acid, which contains a corrosion inhibitor composition consisting essentially of a corrosion-reducing effective amount of at least one acetylenic alcohol having the general formula: [Figure] wherein R1, R2 and R3 are selected from the group consisting of hydrogen, alkyl, phenyl, substituted phenyl and hydroxy-alkyl radicals present in an amount sufficient to comprise at least about 5 percent by volume of said inhibitor composition, a quaternary ammonium compound selected from the group consisting of the N-methyl, N-benzyl and chloromethyl naphthalene quaternaries of alkyl pyridines and quinoline, isoquinoline compounds, benzoquinoline compounds and mixtures thereof, an aromatic hydrocarbon compound which exhibits high oil-wetting characteristics present in an amount sufficient to provide a ratio by volume of acetylenic alcohol to aromatic hydrocarbon of at least about 0.05:1 and an antimony compound which is activated by the other constituents of said corrosion inhibitor composition to reduce the corrosive effect of said acidic solution on said ferrous metal, said antimony compound being at least one member selected from the group consisting of antimony trioxide, pentoxide, trichloride, sulfide, pentachloride, tartrate, and trifluoride, alkali metal salts of antimony tartrate, alkali metal salts of pyroantimonate, antimony adducts of ethylene glycol and solutions containing ethylene glycol, and the oxidized product of hydrogen peroxide and at least one member selected from the group consisting of trivalent antimony compounds and being present in an amount sufficient to provide an antimony concentration of from about 0.0007 to about 0.04 molar to said corrosive acid.