LIQUID FOR HYDRAULIC BREAKAGE OF BED Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: liquid relates to compounds which are used for increasing permeability of productive beds by means of hydraulic breakage of bed, and it can be employed at oil production enterprises. Liquid comprises following components, mas.%: starch, 5.0-10.0; sodium hydroxide, 0.5-1.0; surface-active substance, 0.05-0.075; mixture of sodium tetraborate and peroxidized composition, for example, sodium peroxoborate or urea monoperoxihydrate in proportion of 1-5:1 or 0.7:1.5; water, the balance. Application of aforesaid liquid results in reduction of hydraulic resistance before and after destruction, increasing velocity of liquid destruction in bed together with simultaneous retention of high viscosity and high sand trapping capacity. EFFECT: higher efficiency. 2 tbl