UNDERGROUND FORMATION EXCITATION METHOD Russian patent published in 2013 - IPC E21B43/25 

FIELD: oil and gas industry.

SUBSTANCE: method involves the following stages: a) the first tubular column is arranged in casing string; b) one packer is arranged immediately on far end of tubular column to isolate the first zone of the well from the second zone of the well; at that, the first zone is located from the second zone closer to surface along the well; c) continuous tubular column passing behind the end of the first tubular column to the second zone is arranged in the first tubular column; d) perforating tool connected to continuous tubular column is arranged; e) perforating tool is positioned in the second zone; f) casing string is perforated near perforating tool in the second zone; g) continuous tubular column is removed, including perforating tool, from the well; h) treatment fluid medium is pumped through the first tubular column under pressure that is sufficient for passage of the above fluid medium through at least one of perforation holes in the second zone for creation of hydraulic fracturing in the formation; i) granular material or sealing balls passing to cased well and insulating the perforated interval are pumped through the first tubular column; j) stages (e) - (h) are repeated, at which the other interval is perforated with the above tool in the second zone; k) stages (e) - (h) are repeated, at which the interval located above the previous interval is perforated with the above perforating tool.

EFFECT: increasing the efficiency of the method.

9 cl, 5 dwg