| 摘要 |
oil and gas production. SUBSTANCE: invention relates to grouting mortars used when cementing casing string in gas, gas condensate, and oil boreholes complicated by the presence of weakly bound rocks prone to hydraulic rupture. Mortar contains, wt %: grouting Portland cement 36.47-57.34, hollow aluminosilicate microspheres 6.47-17.65, carboaluminate additive 1.18-2.67, gypsum 1.18-2.67, and water or 4% calcium chloride solution. mud powder 0.71-1.78, water - the balance. Resulting stone shows expansion factor 0.1 to 0.3. EFFECT: decreased density of grouting mortar and increased strength of stone. 2 tbl
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