Exxon Chemical Patents, Inc.

Terence M O'Brien

Niall Carruthers

Paul J Clewlow

Dennis A Williams

Daniel S Sullivan, Iii

James R Looney

John A Haslegrave

Brent I Bourland

John A Haselgrave

A method of acidizing a subterranean formation with an acqueous acid solution wherein the acid solution contains corrosion inhibiting amounts of an amine derivative prepared by reacting an unsaturated carboxylic acid with (a) fatty amine or polyamine, or (b) a fatty amido amine or polyamine, or (c) a fatty imidazoline amine or polyamine. The derivative is characterized by the absence of primary amino groups, and preferably contains only tertiary amino groups.

Amine derivatives as corrosion inhibitors

Amine derivatives which are compounds of the formula (I): ##STR1## in which R is a C.sub.6-20 hydrocarbon; Y is --CO--NH-- and n is an integer of 1 to 6; or ##STR2## in which X is an alkylene group of 2 to 6 carbon atoms and n is an integer of 0 to 6;

Corrosion inhibitors

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New Hinksey, United Kingdom

Terence M O'Brien