FIELD: oil producing industry; applicable in removal of asphalteno-resinous-paraffin deposits from oil field equipment, pipelines and storage tanks. SUBSTANCE: thermochemical composition contains, wt.%: sodium nitrite 15-100; the balance, water, and aqueous solution of other reagents containing, wt.%: sulfamic acid, 9-30; commercial grade aqua ammonia, 6- 22; water, the balance. EFFECT: higher efficiency of removal of high-melting asphalteno-resinous-paraffin deposits due to high exothermicity of chemical reaction of reagents accompanied by increment of heat quantity per unit of volume of reaction mixture. 2 tbl
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