METHOD OF BOTTOM WATER CONE CUTTING Russian patent published in 2018 - IPC E21B43/32 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, in particular to a method of bottom water cone cutting to limit water inflows in oil wells. Method of bottom water cone cutting in oil wells involves stopping the well, extracting downhole equipment from the production column of the main trunk, installing a packer plug 1 m below the lower perforations. After that, the tubing string with the packer is lowered and the isolation composition of the selective action is pumped, then the grouting on a micro-cement basis and the last cement-based grouting composition. Then, the cement beaker is installed to the roof of the productive formation, the tubing string is lifted with the packer and the cement is set to harden. Drill a cement beaker with a packer-stopper, lower the perforator on the tubing into the oil-saturated interval of the formation and perform perforation of the formation, development of the well and its withdrawal to the regime.

EFFECT: proposed method allows to increase the radius, thickness and area of the waterproofing composition, and also to prolong the anhydrous operational life of the well.

1 cl, 4 dwg, 3 tbl