METHOD OF OIL EXTRACTION USING SUCKER-ROD PUMP WITH THERMAL AND GAS IMPACT ON RESERVOIR AND AN EXTRACTION DEVICE Russian patent published in 2023 - IPC E21B43/24 F04B47/02 

FIELD: oil extraction.

SUBSTANCE: inventions group relates to oil extraction, as well as high-viscosity oil extraction, with thermal and gas impact on reservoir and oil lifting using a sucker-rod pump. Method includes feeding the well with heat carrier through hollow rods and through a through channel in the pump, lifting the stream through the space between the columns of hollow rods and tubing. The wellbore level is decreased as much as possible, the packer separates the wellbore above the pay zone, the cavity of hollow rods and the space between the hollow rods columns and tubing are connected to the wellbore below the packer by lowering the hollow rods columns to the lowest position. Gas is injected through the space between the hollow rods and the tubing simultaneously with the coolant supply. The well is stopped for thermal capillary saturation after applying coolant and gas and then the stream is lifted. Device includes tubing and a string of hollow rods, a differential pump with plungers and a hollow rod, suction and discharge valves. A packer is installed between pump sections, a suction valve is placed under packer, a discharge valve is installed on the side above packer, the discharge valve inlet channel is connected to pump cylinder cavity between plungers, an outlet channel is connected to the space between tubing string and sucker-rod string. The lower, smaller diameter plunger is blind and has a side opening in the hollow rod above it. A check valve is fitted at the lower end of the hollow rod string and there are side openings below the check valve.

EFFECT: invention provides for improving the production efficiency by reducing heat loss during coolant transportation from the wellhead to the pay zone and increasing the formation elastic energy.

2 cl, 2 dwg