BOREHOLE OIL PRODUCTION METHOD Russian patent published in 2025 - IPC E21B43/12 E21B43/38 F04F1/20 

FIELD: mining.

SUBSTANCE: invention relates to a fuel and energy complex and can be used in oil production to increase the flowing period of a well under conditions of abnormally high formation pressure (AHFP) and a significant gas factor. Disclosed is a method of well oil production, which includes lowering into a cased and perforated well of a production string with a bottomhole choke, arrangement of annular space between tubing and casing, passing formation fluid from annular space through bottomhole choke, creation by means of bottomhole choke of pressure at the bottom, which is necessary for well flowing, and flowing operation of formation fluid along the production string using gas-lift effect created by the bottomhole choke at the formation level. At that, formation fluid from annular space is first passed through gas separator of rotary type, which is serially installed with bottomhole choke as part of jet pump, and operates in pulse mode with connection of its two active inputs to annular space. First active inlet of the bottomhole choke in the jet pump is connected through the first valve to the liquid outlet of the introduced rotary gas separator, and the second active inlet is connected through the second valve to the annular space. At the same time receiving chamber of jet pump is connected by passive inlet to gas outlet of rotary gas separator, which is constantly driven by flow of formation fluid from annular space. Shaft of the rotary gas separator on the side of its inlet hole is equipped with a flow interrupter, which closes this hole for additional gas release in the periodically formed sealed volumes of the rotary gas separator and the receiving chamber of the jet pump, as well as generation of hydraulic pulses at the well bottom.

EFFECT: increasing oil production overall due to increased intensity of gas release at the bottomhole choke and gas-lift effect, optimization of formation energy consumption, increasing the well flowing period, as well as reducing water cut of the well product.

1 cl, 2 dwg