METHOD OF COMBINED DEVICE TO GENERATE PRESSURE OSCILLATION IN FLUID FLOW Russian patent published in 2013 - IPC B06B1/20 

FIELD: process engineering.

SUBSTANCE: invention relates to oil production and may be used for increasing reservoir recovery. Method of generating pressure oscillations of fluid flow injected into oil reservoir consists in creating circular jet Helmholtz jet generator to be fed to sharp edges of outlet annular channel and generating pressure oscillations of edge tone frequency. Note here that resonator chamber of said Helmholtz generator increases pressure oscillation amplitude while sleeve arranged coaxially inside outlet channel to make a Galton whistle cavity resonator amplifies pressure oscillations generated by said outlet channel inner edge. Proposed device differs from know designs in that single device with common feed nozzle and outlet annular channel combines two resonators tuned in-phase.

EFFECT: generation of oscillations in several frequencies.

4 cl, 1 dwg