Texaco Inc.

Other

Frederick W Valone

Joseph D Rutledge

Michael G DaGue

Charles J Hinrichsen

A series of water-dispersible corrosion and scale inhibiting solutions are disclosed which contain the reaction product of a phosphonate compound containing at least two phosphonate groups of the formula ##STR1## and an ethoxylated, propoxylated alkylphenol amine represented by the formula ##STR2## wherein R is an alkyl group containing about 5 to about 12 carbon atoms, X equals about 1 to about 20, and z equals about 1 to about 20.

Combination corrosion and scale inhibiting system containing

A series of water-soluble, or at least water-dispersible, corrosion inhibiting solutions are disclosed which contain about 2 ppm to about 70%, preferably about 3 ppm to about 200 ppm, of an ethoxylated, propoxylated alkylphenol amine represented by the formula: ##STR1## wherein R is hydrogen or an alkyl group containing about 5 to about 12 carbon atoms, R' is an alkyl group containing about 5 to about 12 carbon atoms, x equals about 1 to about 20, z equals about 1 to about 20, a equals about 1 to about 20, and b equals about 1 to about 20. The salt reaction products of the instant alkoxylated amine and an organic acid selected from the group consisting of hydroxyacetic acid, a fatty acid, a dicarboxylic acid, a dimer-trimer acid, an acidic phosphorus containing compound, and mixtures thereof are also effective in controlling sour and sweet corrosion. A method is also disclosed for protecting metal from corrosion by contacting the metal with an effective amount of the amine or the amine/acid reaction products, in a continuous or batch treatment.

Corrosion inhibiting system containing alkoxylated alkylphenol amines

A series of oil soluble to water-dispersible, corrosion inhibiting solutions are disclosed which contain about 2 ppm to about 70%, preferably about 3 ppm to about 200 ppm, of an ethoxylated, propoxylated dialkylphenol amine represented by the formula: ##STR1## wherein R and R' are alkyl groups containing about 5 to about 12 carbon atoms, x equals about 1 to about 10, and z equals about 2 to about 20. The salt and amide reaction products of the instant alkoxylated amine and an organic acid selected from the group consisting of hydroxyacetic acid, a fatty acid, a dicarboxylic acid, a dimer-trimer acid, an acidic phosphorus containing compound, and mixtures thereof are also effective in controlling sour and sweet corrosion. A method is also disclosed for protecting metal from corrosion by contacting the metal with an effective amount of the amine, or the amine/acid or amide reaction products, in a continuous or batch treatment.

Corrosion inhibiting system containing alkoxylated dialkylphenol amines

Aqueous substrates are treated to inhibit microbiological growth by addition of dimethylaminopropylmethacrylamide or dimethylaminopropylacrylamide. In the presence of corrosion inhibitors, it is found that the instant biocides will permit attainment of 100% biocidal kill when present in lesser amounts than are required when no corrosion inhibitor is present. Presence of the instant biocides causes no deletrious impact upon the corrosion inhibitors; and in fact an improvement in corrosion inhibition is observed in the presence of the biocide.

Inhibition of microbiological growth

A series of water-soluble, or at least water-dispersible, corrosion inhibiting solutions are disclosed which contain about 2 ppm to about 70%, preferably about 3 ppm to about 200 ppm, of an ethoxylated, propoxylated alkylphenol amine represented by the formula: ##STR1## wherein R is an alkyl group containing about 5 to about 12 carbon atoms, x equals about 3 to about 15, and z equals about 2 to about 10. The salt and amide reaction products of the instant alkoxylated amine and an organic acid selected from the group consisting of hydroxyacetic acid, a fatty acid, a dicarboxylic acid, a dimer-trimer acid, a phosphate ester and mixtures thereof are also effective in controlling sour and sweet corrosion. A method is also disclosed for protecting metal from corrosion by contacting the metal with an effective amount of the amine, or the amine/acid or amide reaction products, in a continuous treatment.

Corrosion inhibiting system containing alkoxylated amines

A series of novel water-dispersible corrosion inhibiting solutions are disclosed which contain a composition which includes the reaction product of an amine mixture and an organic monomer acid mixture. A process for the inhibition of corrosion in aqueous environment is also disclosed. The process is particularly useful for protecting metal surfaces in subterranean petroleum pumping wells.

Corrosion inhibitors

A series of novel oil-dispersible corrosion inhibiting solutions are disclosed which contain dicyclopentadiene (3a, 4, 7, 7a-tetrahydro-4, 7 methanoindene) sulfonate salts along with an organic corrosion inhibitor in a low molecular weight solvent. The inhibiting solutions containing dicyclopentadiene sulfonate salts are effective in dramatically reducing corrosion rates in the oil field, especially pitting from hydrogen sulfide.

Corrosion inhibition system containing dicyclopentadiene sulfonate salts

Novel oil-dispersible corrosion inhibiting solutions are disclosed which contain an ethoxylated tertiary amine along with an organic corrosion inhibitor in a solvent. The inhibiting solutions containing the instant ethoxylated amines are effective in reducing corrosion rates in the oil field.

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Houston, TX, United States of America

Frederick W Valone