OPENING METHOD FOR OPERATING COLUMN AND PRODUCTIVE LAYER IN OPERATING AND EXPLORATION WELLS Russian patent published in 2004 - IPC

FIELD: technology for opening productive layers in operating and exploration wells. SUBSTANCE: method includes hydroabrasive perforation of operating column, concrete layer and layer rock, cleaning of well with technological fluid after previously said procedure with hydroabrasive perforation of operating column and concrete layer on quartz base. After hydroabrasive perforation of operating column and concrete layer local rifts are cleaned with fluid without abrasive. Then abrasive is supplied to the fluid of denseness of 4-7.8 grams on cubic centimeter and of rigidity of 5 to 9 units of Moos scale, together with powdered gas producing reagent in form of nifrite ammonium. EFFECT: heightened kinetic energy of abrasive materials particles during hydroperforation of layer rock while hydraulic resistance of hydroabrasive environment is lessened. 2 cl, 1 ex