FIELD: oil and gas production. SUBSTANCE: composition destroying oil emulsions and simultaneously desalting crude oil and protecting equipment against corrosion contains, wt %: (1) block copolymer of glycol-based ethylene and propylene oxides, 20-60; product of interaction of toluylenediisocyanate with polyether prepared by oxyalkylenation of glycol, 12-15; and solvent, the balance; (2) block copolymer of glycol-based ethylene and propylene oxides, 20-60; block copolymer of ethylenediamine-based ethylene and propylene oxides, 10-40; polyether-toluylenediisocyanate interaction product, 12-15; and solvent, the balance. Composition uptake is 25-75 g per 1 t of oil. Residual water content in treated oil is no higher than 0.25 wt % and protective effect against hydrogen sulfide corrosion is 77-81%. EFFECT: enhanced dehydration and corrosion protection efficiency. 2 cl, 2 tbl, 18 ex
