METHOD OF SIMULTANEOUS-SEPARATE OPERATION OF WELL WITH HYDROFRACTURING Russian patent published in 2017 - IPC E21B43/267 E21B33/12 E21B43/14 

FIELD: mining.

SUBSTANCE: method of simultaneous-separate operation of a well with hydrofracturing with the use of a drillable bridge plug with a valve, in wells with two or more productive layers is realized in that the bridge plug is installed above the underlying layer from the treated one by means of a setting tool with a chopper valve with electric drive on a cable or hydraulic setting tool on tubing pipes. After removing the setting tool, the packer is sealed with a throw ball and the upper seams are hydrofractured according to the known technology without shutting down the lower ones and without removing the packer that ensures seam separation and their simultaneous-separate operation. When the well is put into operation, the upper layers are running. If the lower layer has more performance than the upper one, it works by raising the throwing ball. At low productivity of the lower layer, the drillable bridge plug prevents from oil well fluid forcing-through from the upper layers into the lower one.

EFFECT: providing the ability to perform work on hydrofracturing of the upper seams without shutting down the lower ones and without removing the packer that ensures seam separation and their simultaneous-separate operation.

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