METHOD FOR UPGRADING GAS-CONDENSATE WELL Russian patent published in 2018 - IPC E21B23/00 E21B33/03 E21B43/26 

FIELD: oil and gas industry.

SUBSTANCE: method includes well killing, removing the Christmas tree, installing blowout-prevention equipment on the tree tube head, extracting the lift string, running in and installing a packer-plug in the well, dismantling the blowout-prevention equipment, the tube head and casing connections, installing new casing connections and the tube head, and installing the blowout-prevention equipment thereon, drilling or extracting the packer-plug, running in the new lift string equipped with a circulation valve, a hydraulic packer, a mounting nipple and a guide funnel, dismantling the blowout-prevention equipment, mounting a new Christmas tree, mounting a lubricator, running a cutoff valve therethrough and mounting thereof in the mounting nipple. After that, the lubricator is removed, and protection portion of the tube holder equipped with a check valve connected to the injection line is installed. Then packer is activated by creating pressure in the lift string, the packer is pressurized by creating pressure in annular space. After that, disconnecting the injection line, dismantling the protection portion of the tube holder, and installing the lubricator, removing the cutoff valve, opening the circulation valve, inducing the influx, closing the circulation valve, dismantling the lubricator, mounting the blowout-prevention equipment and protection portion of the tube holder, connecting to the injection line, hydraulic fracturing of the formation, extracting of the protection portion of the tube holder, working the well by flaring, and its starting in a loop.

EFFECT: increased service life of the well before it enters the inactive well stock.

5 dwg