FIELD: oil and gas industry.
SUBSTANCE: invention relates to the field of protection of gas and oilfield equipment and pipelines operating in hydrogen sulfide-containing highly mineralized aqueous media from corrosion and flooding, as well as for the transportation of oil and gas. The method involves the interaction of polyethylene polyamines and carboxylic acids with the distillation of reaction water and impurities, while tetraethylene pentamine is used as polyethylene polyamine, which interacts with monocarboxylic acid first at a temperature of 145-155°C for 4-5.5 hours, then at 255°C for 2 hours in a molar ratio of tetraethylene pentaamine : monocarboxylic acid, equal to 1:2, followed by the interaction of the resulting bis-imidazoline with acrylic acid nitrile at a temperature of 80°C.
EFFECT: expansion of the raw material base and the range of corrosion inhibitors.
2 cl, 1 tbl, 2 ex
