WATER-FREE GROUTING MORTAR Russian patent published in 2013 - IPC C09K8/467 

FIELD: oil and gas industry.

SUBSTANCE: grouting mortar containing binding agent and SAS-modified hydrocarbon liquid is featured by use of DS BTRUO hydrocarbon liquid is used as SAS-modified hydrocarbon liquid and the following Portland cement grouting mixtures are used as binding agent: cement mixture Standard BTRUO with specific surface area not less than 300.0 m²/kg; cement mixture Medium BTRUO with specific surface area not less than 500.0 m²/kg; cement mixture Micro BTRUO with specific surface area not less than 900.0 m²/kg respectively and it contains additionally surface active substance (SAS), PAV BTRUO, which is an oil-soluble polymer in which capacity 20%-solutions of polyisobutylene is used in the following hydrocarbon solvents: PIB15 or PIB20 or PIB 30 and fine siliceous filler in which capacity microsilica or ground mould or ground diatomite is used with the following ratio of components in percents by weight: binding agent: cement mixture Standard BTRUO or Medium BTRUO or Micro BTRUO - 59.0-71.0; surface active substance PAV BTRUO - 0.2÷0.5; oil-soluble polymer - 20%-solutions of polyisobutylene in hydrocarbon solvent: PIB 15 or PIB 20 or PIB 30 - 1.0-10.0; fine siliceous filler: microsilica or ground mould or ground diatomite - 1.0-7.0, hydrocarbon liquid DS BTRUO - remaining portion.

EFFECT: reducing filtrate return, increasing sedimentative durability.

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