FIELD: oil and gas producing industry; applicable in cementing of oil, gas, gas-condensate wells. SUBSTANCE: light- weight grouting mix includes portland cement, swollen vermiculite sand and inorganic hollow microspheres in form of aluminosilicate microspheres - product of separation o ashes of thermal power plants, with the following content of component, wt.%: portland cement 90-98; swollen vermiculite sand 1-5; the balance, aluminosilicate microspheres. EFFECT: reduced water separation from grouting slurry and higher cohesion strength of formed cement stone with casing string. 1 tbl
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Authors
Dates
2002-08-20—Published
2000-12-20—Filed