FOAM FORMING SOLUTION FOR BORE HOLES PUTTING INTO PRODUCTION Russian patent published in 1995 - IPC

FIELD: gas and oil extraction industry. SUBSTANCE: foam forming solution favours decrease of equipment corrosion and increase of efficiency of boreholes putting into operation due to control of foam forming speed under different temperatures of layers. Solution has (in mass % ): urea 4.0 - 7.5, acid 0.8 - 6.0, nitrites of alkali metals 24.6 - 33.71, PAV 0.5 - 1.0, diammonium phosphate 8.3 - 16.24, Diammonium phosphate acts as pH regulator of medium from 4.0 to 7.0 and facilitates speed of chemical reaction of gas liberation. Regulation of pH medium favours decrease of equipment corrosion, in case of pH is equal to 4.0 interaction between initial components of solution is going without formation of corrosion causing products. The method of foam formation on borehole site is simple, inexpensive, does not require special facilities and is used to produce foam, foam cements, foam concretes, foam polymers, light boring and tamponage solutions for pumping in bore holes. It is used to clean and wash critical zones of layer, to remove sand sticks and to intensify processes of gas and oil extraction. EFFECT: foam forming solution for bore holes putting into operation is used in gas and oil extraction industry. 5 dwg, 4 tbl