FIELD: methods and devices for pulse treatment of producing formations and well strainers. SUBSTANCE: device includes pipe string, vibrator consisting of generator of fluid pressure fluctuations with inlet nozzle and diffuser. Diffuser opening angle exceeds 15 deg. Inner diameter of bore exceeds inner diameter angle exceeds 15 deg. Inner diameter of bore exceeds inner diameter of inlet nozzle by a factor of, at least, 4. There is outlet device. Inlet nozzle is communicated with pipe string and diffuser, and outlet device, with bore and annular space. Device is provided with jet pump located above vibrator. Jet pump consists of nozzle, intake chamber, mixing chamber, working chamber and diffuser. Jet pump nozzle inlet is communicated with pipe string. Mixing chamber with annular space, and its diffuser, with vibrator inlet nozzle. Installed at inlet of intake chamber is filter. In realization of method, preliminarily static pressure inside pipes is determined above vibrator inlet nozzle. Fluid static pressure in annular space is also determined. Then, working medium flow rate is preset and section of outlet device is established for maintaining the cavitation coefficient within 0.1-0.5. Selecting various vibrators with corresponding values of areas of cross-section of inlet nozzle, required pressure and flow rate of working medium are determined and compared with pump parameters taking into account hydraulic resistance in pipe string. To reduce hydraulic resistance, amount of working medium supplied to well is reduced. Working medium is added with well fluid by its supply to vibrator. Amount of supplied fluid to vibrator is regulated by variation of its density. EFFECT: higher efficiency of treatment of producing formations and well strainers by provision of optimal parameters of vibrators operation in regime of periodically disrupted cavitation, reduced hydraulic resistance in pipe string and power consumption. 5 cl, 5 dwg
