FIELD: oil producing industry; applicable in removal of asphaltene-resinous- paraffin deposits from oil field equipment, pipelines and storage tanks. SUBSTANCE: thermochemical composition includes aqueous solution of sulfamic acid and technical aqua ammonia, and aqueous solution of inorganic oxidizer reagent in form of sodium hypochlorite. Aqueous solutions are used in the following amounts of components, wt.%: sulfamic acid 3-30; technical aqua ammonia 18-70; the balance, water. Thermochemical composition includes sodium hypochlorite in amount of 7-20; the balance, water. EFFECT: higher efficiency of removal of asphaltene-resinous-paraffin deposits due to higher exothermic nature of chemical reaction of reagents accompanied by increment of heat quantity accounted for unity of reaction mixture volume. 2 tbl
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