Patent ID: 7994102
Filing Date: 2011-08-09
Classification: C09K

Abstract:
1. A method of treating an alloy surface in a wellbore treatment application comprising the step of contacting the alloy surface with a treatment fluid comprising an aqueous acidic fluid and a corrosion inhibitor comprising an alkyl sarcosinate so that a reduction in corrosion of the alloy surface occurs compared with only contacting the alloy surface with the aqueous acidic fluid, wherein (i) the corrosion inhibitor is present in a range of about 0.10 vol. % to about 10 vol. %, (ii) the corrosion inhibitor reduces corrosion rates of the alloy surface to less than about 0.050 lb/ft 2 , (iii) the acid of the aqueous acidic fluid is selected from the group consisting of hydrochloric acid, hydrochloric-hydrofluoric acid, acetic acid, formic acid, citric acid, phosphonic acid, methanesulfonic acid and combinations thereof, and (iv) the alloy surface is present in an application comprising pickling a tubular, cleaning a wellbore, matrix acid stimulation, acid fracturing, acid tunneling, drilling mud removal, coiled tubing application, or damage removal.