GROUTING POLYMER COMPOSITION FOR HIGH TEMPERATURES Russian patent published in 2021 - IPC C09K8/508 E21B33/138 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, in particular to compositions for isolating or limiting water inflow, for leveling the input profile, eliminating absorption zones of high-temperature wells. The grouting polymer composition for high temperatures contains a copolymer of acrylamide and acrylic acid, water and crosslinkers: paraform and resorcinol, additionally contains a gelation regulator, the Kratol reagent, with the following component ratio, weight percentage: copolymer of acrylamide and acrylic acid 0.18-1.7; paraform 0.03-0.2; resorcinol 0.02-0.12; Kratol reagent 0.01-1.0; water is the rest. According to the second alternative, the grouting composition may contain paraform and resorcinol with aerosil as a crosslinker, water and additionally a gel formation regulator, which is used as a Kratol reagent, with the following component ratio, weight percentage : copolymer of acrylamide and acrylic acid 0.18-1.7; paraform 0.03-0.2; resorcinol 0.02-0.12; aerosol 0.01-0.03; Kratol reagent 0.01-1.0; water-the rest.

EFFECT: improved quality of insulation in high-temperature layers due to increasing the injection depth, the strength of the cross-linked polymer system formed in the watered zone, as well as expanding the temperature range of the application of the grouting polymer composition.

2 cl, 3 dwg, 3 tbl