COMPOUND AND METHOD FOR PRODUCING REAGENT FOR CROSS-LINKING SOLUTIONS OF POLYSACCHARIDES Russian patent published in 1999 - IPC

FIELD: oil and gas production industry. SUBSTANCE: water solutions of polysaccharides are used in oil and gas production industry for producing sand-carrying liquids used in hydraulic fracturing of bed. Compound and method for production of reagent provide for mixing of decahydrate tetraborate of sodium and glycerine with subsequent adding of alkali in following proportion of components, mas. %: decahydrate tetraborate of sodium 15-25, glycerine 35-70, 5-40% water solution of sodium or potassium hydroxide 55-50. Additionally introduced into thus produced solution is chrome-potassium alum or chrome acetate in amount of 1-50 g/kg. Application of aforesaid compound and method simplifies technological process, improves rheological properties both at 20 C and at higher temperatures. EFFECT: higher efficiency. 23 cl, 3 tbl, 10 ex