COMPOSITION FOR REMOVING DEPOSITS OF COMPLEX MINERAL-ORGANIC NATURE FORMED IN A WELL DURING EXTRACTION OF HYDROCARBON OR MINERAL RESOURCES Russian patent published in 2020 - IPC C09K8/524 C09K8/528 

FIELD: extractive industry.

SUBSTANCE: invention relates, in particular, to extractive industry and can be used for removal of complex deposits of mineral-organic nature. Composition contains a composition having a hydrogen index of 10–12, wherein the composition contains a complexone – polyaminopolycarboxylic acid or salt thereof, an additive and water, as polyaminopolycarboxylic acid or its salt, the composition contains two different reagents 1 and 2, each of which is selected from the group: potassium diethyl triamine pentaacetate; disodium salt-N,N-diacetate of glutamic acid; N,N-diacetate of glutamic acid; ethylenediaminetetraacetic acid; as an additive, the composition contains a surfactant alkyldimethylamine oxide C₁₂-C₁₄, with following ratio of components, wt%: reagent 1 (in terms of dry substance) 5–36; reagent 2 (in terms of dry substance) 5–36; said surfactant (in terms of dry substance) of 0.1–0.15; water – balance.

EFFECT: high degree of removal of complex deposits, including both mineral and organic component, while increasing composition specific dissolution – removal.

1 cl, 1 tbl, 1 ex