METHOD AND DEVICE FOR JET HONEYCOMB PARAMETRICAL GUN FOR PRESSURE WAVES GENERATING AND MODULATING IN THE INJECTION WELL HOLE Russian patent published in 2017 - IPC E21B43/25 E21B28/00 F15B21/12 B06B1/20 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is designed for the casing walls and perforations cleaning from solid deposits, decolmatation of the bottomhole formation region (BFR) and increase of formation fluids mobility. The method of pressure waves generating and modulating in the injection well hole, in which: the jet honeycomb gun is assembled from several Hartmann generators (HG). At that each HG is the independent oscillatory system, consisting of the nozzle and hollow chamber-resonator with the opening in the wall and excited by the gas jet. Arrange the gas jet beyond the nozzle in each HG and direct it into the hole in the corresponding hollow chamber-resonator wall. Generate the pressure oscillations and intensify its amplitude in the hollow chamber-resonator. The high-frequency pressure wave is generated beyond each HG, propagating in one direction with the waves from other HG and interacting with them. At the same time HG is different-frequency independent oscillating systems. One part of different-frequency independent oscillating systems is tuned to the generation, amplification and formation of the high-frequency wave of one frequency, and the other part of independent oscillating systems - to another frequency. In this case, the jet honeycomb gun is installed in the well. Form the parallel high-frequency waves of two different frequencies beyond it, interacting with each other and forming the low-frequency wave of different frequency as the result of modulation in the nearfield, which is amplified in the low-frequency resonance chamber and directed to the injection well hole.

EFFECT: increase of the low-frequency pressure wave formation efficiency with high amplitude in the bottomhole formation region.

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