| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: present invention pertains to strengthening oil and gas wells. The backfill mixture contains Portland cement and mixing liquid, containing water, methylcellulose, melamine formaldehyde resin, potassium chloride and silica gel, with the following ratio of ingredients, in wt %: Portland cement 64.39-64.97, methylcellulose 0.16-0.27, melamine formaldehyde resin 0.16-0.27, potassium chloride 1.05-5.24, silica gel 3.5-5.24, water - the rest. ^ EFFECT: reduced permeability of cement stone and its increased early strength at low temperatures above zero. ^ 5 ex, 1 tbl |
