CORROSION AND ASPHALT-RESIN-PARAFFIN DEPOSIT INHIBITOR Russian patent published in 2016 - IPC C09K8/54 C09K8/524 

FIELD: oil industry.

SUBSTANCE: invention relates to petroleum industry, in particular to compositions for preventing formation of asphaltene deposits and corrosion of downhole equipment for oil operating under high temperature conditions. Corrosion and asphaltene deposition inhibitor comprises an active part, an additive and a solvent. Active part used is emulsifier of reverse-water emulsions - Yalan E-2 grade B2 (conc), additive used is a quaternary ammonium base, a nonionic surfactant and a low molecular weight acid (C₁-C₄), and solvent is a mixture of alcohol and hydrocarbon compounds in following ratio, wt%: Yalan E-2 grade B2 (conc) - 10-60, additive - 1-15, solvent - balance, with following ratio of components in additive, wt%: quaternary ammonium base - 55-100, nonionic surfactant - 0-35, low molecular weight acid (C₁-C₄) - 0-10.

EFFECT: result is high corrosion resistance of downhole equipment operating in high temperature conditions.

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