FIELD: oil and oil processing industry. SUBSTANCE: composition comprises 15-50 wt.% of oxyethylated product of condensation of monoalkylphenol of C4-C30-alkyl chain or its mixture with dialkylphenol of C4-C30-alkyl chain with formaldehyde-containing product in their mole ratio = 1: (0.8-1.2) as measured for formaldehyde, 2-20 wt.% of polyester derivative taken among the group: product of interaction of block-copolymer of ethylene and propylene oxides based on glycerol with toluylenediisocyanate, oxyethylated polyester resin of molecular mass 4000-6000 Da "Dissolvan 3264" sort, polyglycols "L5001M" and "R8327" sorts, block-copolymer of ethylene and propylene oxides, the balance up to 100 wt.%. Invention provides to protect oil field equipment from asphaltene-resin-paraffin deposits and corrosion and solves the problem of sewage treatment in the process of oil preparing. Invention can be used for destruction of water-oil emulsions, protection of oil field equipment from asphaltene-resin- -paraffin deposits and corrosion. EFFECT: enhanced effectiveness of composition, improved ecology. 2 cl, 2 tbl, 29 ex
