THERMOCHEMICAL COMPOUND TO REMOVE ASPHALT-RESIN-PARAFFIN DEPOSITS Russian patent published in 2003 - IPC

FIELD: oil industry, removal of asphalt-resin-paraffin deposits from bottom-hole zone of bed , from oil extracting equipment, pipe-lines and tanks. SUBSTANCE: thermochemical compound to remove asphalt-resin-paraffin deposits includes aqueous solution of sodium nitrite, organic solvent and aqueous solution of reaction initiator. Aqueous solution of sodium nitrite has following composition, mas.%: sodium nitrite, 8.0-100.0; water, the balance. Reaction initiator carries sulfamidic acid of following composition, mas. %: sulfamidic acid, 13.0-36.0, water, the balance. Aqueous solution of sulfamidic acid additionally includes reagent neutralizing sulfamidic acid to degree under 97.0%. Technical caustic ammonia, ammonia carbonate or hydrocarbonate, hydroxide, carbonate or hydrocarbonate of alkali metal or their mixture with volumetric proportion (0.5-3.0):1 of organic solvent to the rest of components of thermochemical compound is utilized as such reagent. Aliphatic or aromatic hydrocarbon or oil or their mixture is employed in the capacity of organic solvent. In addition compound can include emulsifying agent. EFFECT: simplified thermochemical compound. 5 cl, 4 tbl