COMPOSITION FOR REMOVING ASPHALT-RESIN-PARAFFIN DEPOSITS Russian patent published in 2001 - IPC

FIELD: oil and other industries related to production, transportation and storage of oil (condensate) and used for removing or preventing asphalt-resin-paraffin deposits in wells, on oil production equipment and in face zone of seam. SUBSTANCE: composition comprises aromatic solvent, nonionic surfactant OP-7 or OP-10 anion-active surfactant (sulfonol) at ratio with OP-7 or OP-10 of 1:3.5, ratios of components being as follows, wt %: OP-7 or OP-10, 16-35; sulfonol, 4.5-10.3; and aromatic solvent, the balance. Aromatic solvent is heavy fraction of aromatic hydrocarbons from zeoforming unit. EFFECT: composition having low content of resins and asphaltenes from inexpensive and readily available chemical reagents. 3 cl, 14 ex, 1 tbl