FIELD: oil industry.
SUBSTANCE: invention relates to oil and gas industry. Composition for preventing formation of salt deposits in downhole equipment contains, wt%: oxyethylidene diphosphonic acid 1-3; hydrochloric acid 7-10; ammonium bifluoride 1-2; nonionic surfactant 0.1-0.2; water -balance.
EFFECT: technical result is higher efficiency of preventing precipitation of salts in a long period of time of well operation due to reduced surface tension at oil-inhibiting solution boundary and formation of strong silicate films, including inhibitor, on surface of rock-forming minerals.
1 cl, 5 dwg
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