FIELD: oil industry. SUBSTANCE: slots are cut through in tiers with intervals over height from shaft of cased well. Packer is sunk into well on string of pipes and is packed between first and second tiers of slots from seam roof. Then fluid to break seam is pumped under pressure in string of pipes and slots of second tier. Vertical spaces-conduits are formed in rock behind string cement stone. Mentioned operations are conducted between each pair of tiers located beneath. Vertical spaces-conduits are washed through and fluid-sand carrier is pumped into them. EFFECT: enhanced productivity of wells, reduced usage of materials and equipment, prevention of bearing strain of cased strings. 4 cl
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