COMPOSITION FOR REMOVAL OF ASPHALTENE-RESINOUS AND PARAFFIN DEPOSITS Russian patent published in 2004 - IPC

FIELD: oil and gas production. SUBSTANCE: composition for removal of asphaltene-resinous and paraffin deposits in production, transportation, and storage systems contains (i) 0.05-0.5% surfactant: oxyethylated monoalkylphenol of general formula RC₆H₄(OC₂H₄)_mOH, in which m=6-10 and R is C₉H₁₉, and bis(alkylpolyoxyethylene) phosphate of general formula [C_nH_2n+1O(C₂H₄O)_q]₂POOR¹, in which n=8-10, q=6, and R¹ is H or K, at their ratio 1: (3-5); (ii) 20-50% aromatic solvent; and (iii) aliphatic solvent (the balance). EFFECT: increased assortment of oil deposit cleansers. 1 tbl, 64 ex