FIELD: oil and gas industry.
SUBSTANCE: invention relates to the oil and gas industry, in particular to compositions for removing deposits of barium sulfate in the well and oilfield equipment. The composition for dissolving the precipitate of barium sulfate contains, wt.%: tetrasodium salt of ethylenediaminetetraacetic acid - Trilon 5-10; sodium salt of polyacrylic acid 5-10; methanol 5-10; sodium hydroxide 1-3; water - the rest.
EFFECT: improving the efficiency of chemical treatment of downhole pumping equipment of wells or pipelines by increasing the dissolving power of the composition for barium sediments and maintaining low corrosivity in relation to oilfield equipment.
1 cl, 1 tbl, 1 ex
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