METHOD AND FOR ULTRASONIC INTENSIFICATION OF OIL PRODUCTION AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC E21B43/25 E21B43/16 E21B28/00 

FIELD: oil and gas industry.

SUBSTANCE: method includes placing a well device in well at working depth and connecting it to ground source, and performing excitation of elastic oscillations of different frequencies. At that, polluting products are destroyed from the bottomhole area of the oil formation, and oil recovery is stimulated by regular impact of elastic oscillations field of ultrasonic range in a continuous mode and pulse acoustic low-frequency action with simultaneous removal of the polluting products from bottomhole area of oil formation by creating rarefied space in the well perforation area and withdrawing said products from well with a jet pump. In the continuous mode, the impact is performed by high-frequency oscillation of 16-25 kHz in ultrasonic range, and the impact is carried out in pulse mode at frequency of 1-50 Hz. At that, the impact on the perforation area is started from the lower section with the subsequent movement above. The oil stimulation devices are three main devices: an ultrasonic generator, a downhole acoustic emitter and the jet pump. The downhole emitter is of magnetostrictive type or has a modular structure consisting of resonators with piezoelectric packs.

EFFECT: increase of operation efficiency for intensification of oil production and duration of impact effect of equipment used.

12 cl, 5 dwg