LIGHTENED GROUTING MORTAR

摘要

FIELD: grouting mortars applicable in cementing of casing strings of gas, gas condensate and oil wells complicated with presence of incoherent liable to hydraulic rupture rocks. SUBSTANCE: lightened grouting mortar contains ingredients in the following amounts, wt.%: grouting portland cement 53.75- 62.67; hollow glass microsphere 1.33-3.75; carboaluminate additive 1.25-2.67; gypsum 1.25-2.67; the balance, water or 4% solution of calcium chloride. EFFECT: expansion of cement stone within 0.1-0.3% with simultaneous decrease of density of grouting mortar to 1.42 g/cu.cm. 3 tbl