METHOD FOR GENERATING AND MODULATING PRESSURE WAVES IN AN INJECTION WELLBORE AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC E21B43/25 

FIELD: oil industry.

SUBSTANCE: group of inventions relates to a method for generating and modulating pressure waves in an injection wellbore and a device for its implementation. The method for generating pressure waves in an injection wellbore includes installing a device for generating and modulating pressure waves at the lower end of the tubing, supplying fluid through an inlet nozzle to a cylindrical chamber. A jet of liquid is directed through the rings to the outlet. A jet of liquid is formed in the space between the bottoms. Primary pressure fluctuations are generated at two high close frequencies when the jet flows through the rings. Create low frequency beats and excite resonance in the cylindrical chamber at a beat frequency corresponding to the natural frequency of the cylindrical chamber. A low-frequency pressure wave is formed behind the outlet in the well annulus at the beat frequency.

EFFECT: technical result consists in increasing the efficiency of pressure fluctuations, in increasing the mobility of fluids in the bottomhole formation space, in increasing the mechanical effect on solid deposits on the walls of the well when a technical fluid is injected into it.

2 cl, 3 dwg