PLUGGING MATERIAL FOR HIGH-TEMPERATURE WELLS Russian patent published in 2003 - IPC

FIELD: oil producing industry; applicable in isolation of formations of oil, gas and gas-condensate wells under complicated mining and geological conditions. SUBSTANCE: plugging material includes binder, ground sulfur with the following ratio of components, wt.%: binder, 80-95; ground sulfur, the balance. Binder of plugging material may be used in the form of portland cement, slag-portland cement, alumina cement, slag-sand cement mix, slag-sand mix. EFFECT: increased period of injection of plugging mortar at bottom-hole temperatures above 120 C and production of gas-impermeable cement stone with high adhesive strength with string at temperature below 105 C. 6 cl, 1 tbl