| 摘要 |
FIELD: mining. ^ SUBSTANCE: here is disclosed expanding backfill material for cementing oil and gas wells in complicated geological-technical conditions of cryolite zone requiring upgraded reliability of isolation of beds. Expanding backfill material contains, wt %: Portland cement 22-30; gypsum 50-60, zeolite 18-20, and fluidifier C-3 2. ^ EFFECT: reduced period of material cementation, increased strength, decreased cost of process. ^ 1 tbl |
