FIELD: methods or devices for cementing, plugging holes or the like, particularly grouting mortars to cement casing pipes in gas, gas condensate or oil wells complicated with presence of loosely bonded rock liable to hydraulic fracturing.
SUBSTANCE: grouting mortar comprises 48.46-60.00 % by weight of plugging Portland cement; 0.01-0.07% by weight of polyacrylamide Praestol and 33.33-41.15 % by weight of calcium chloride having density of 1.03 g/cm3 or calcium and sodium chloride solutions with 1.03 g/cm3 density.
EFFECT: reduced weight and water loss capacity, possibility to obtain cement stone having increased binding ability to casing pipe.
1 ex, 1 tbl
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