BACKFILL COMPOSITION Russian patent published in 2021 - IPC E21B33/138 C09K8/42 C09K8/50 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, specifically to compositions used for repair and insulation works in eliminating water inflows in production oil, gas and gas condensate wells, as well as for isolation of thief zones in drilling of oil and gas wells under moderate and high temperatures. The backfill composition contains 70 to 99% wt. ethyl silicate, 0.5 to 2.5% wt. titanium tetrachloride, 0.1 to 27% wt. glycols, 0.2 to 7.8% wt. esterified phenyl still bottoms and 0.2 to 7.8% wt. esterified vinyl still bottoms. Wherein the total content of esterified phenyl and vinyl still bottoms does not exceed 8% wt.

EFFECT: increased technological and mechanical characteristics of the composition and the polymer material produced thereof.

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