| 摘要 |
FIELD: oil and gas production. ^ SUBSTANCE: waterproofing capacity of grouting mortar is enhanced when carrying out waterproofing operations in oil and gas wells is increased owing to expansion of values of silica modulus from 3.5 to 5.0. To that end, in a method of preparing grouting mortar, comprising dissolution of sodium silicate block in presence of water at heating and mixing of resulting liquid glass (aqueous sodium silicate solution) with modifying additive, water, and organic hardener, (i) said modifying additive is represented by silica filler "Rosil-175", which is added during above-mentioned dissolution at ratio of 27-50 wt parts to 100 wt parts sodium silicate block and 200-300 wt parts water, after which the total is mixed until silica modulus 3.5-5.0 is reached and modified liquid glass is obtained; and (ii) said organic hardener is formamide. Following proportions of components are used, wt parts: modified liquid glass 100, water 10-25, formamide 10-25 or ethyl acetate in presence of Neonol AF 9-12 is used at following proportions of components: modified liquid glass 100, water 100, ethyl acetate 5-10, Neonol AF 9-12 - 1. ^ EFFECT: enhanced waterproofing capacity of grouting mortar. ^ 3 tbl, 9 ex |
