DEVICE FOR GAS PULSE TREATMENT OF WELLS Russian patent published in 2020 - IPC E21B37/00 E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to operation of geotechnical, oil-and-gas wells and can be used in gas pulse treatment of wells to increase productivity of productive formation. Proposed device comprises high-pressure chamber housing with filling valve on one end face and channel on opposite end face. Concentrically with it housing of low pressure chamber with valve control device of pulses, exhaust openings with replaceable nozzles, each of which is oriented in radial direction with respect to device vertical axis, and is equipped with spring-loaded casing telescopically arranged between high-pressure chamber and low-pressure chamber with possibility of back-and-forth movement for opening and closing of exhaust openings. Total area of critical sections of nozzles is within 0.5–1 of minimum section area of channel of high-pressure chamber. Casing is coupled with the housing of the low-pressure chamber along the sealing surfaces equipped with sealing rings.

EFFECT: providing qualitative treatment of productive formation due to adjustment of device on conditions in well taking into account properties of rock of productive formation, improved manufacturability and reliability of structure, reducing wear and preventing corrosion of precision parts of valve device, reducing losses for pulse, improving operating conditions of device.

6 cl, 6 dwg