COMPOSITION FOR REMOVAL OF ASPHALT-RESINOUS-PARAFFIN ACCUMULATIONS Russian patent published in 2001 - IPC

FIELD: dissolving of accumulations in oil producing industry; applicable in systems of oil production, transportation and storage for removal of asphalt-resinous- paraffin accumulations. SUBSTANCE: for cleaning wells from accumulations of resins, paraffins and asphaltenes, solvent of definite low-cost composition is injected into well. Said composition for treatment of wells, their bottom-hole zones and surfaces of equipment includes still bottoms of ethyl benzene rectification in amount of 20-80 mas.% and still bottoms of styrene rectification in amount of 5-30 mas.%, and waste of propylene oligomers production - fraction C₁₂₊ in amount of 15-50 mas.%. EFFECT: qualitative, quick and economical dissolving and removal of asphalt-resinous- paraffin accumulations from wellbores, oil field services, surfaces of oil producing equipment and also cleaning of engines and equipment of compressor stations from carbon deposits and coke. 2 tbl, 1 ex