FIELD: oil and gas industry. SUBSTANCE: well flushing out device has a hollow body with inlet and annular channels. The body is provided with a tip. The tip has an axial channel. The tip is rigidly attached to the body. A generator of hydrodynamic pulses is mounted in the body co-axially with the tip. There are additional generators of hydrodynamic pulses arranged in the tip circumferentially relative to the axial channel. These additional generators are in hydraulic engagement with the inlet channel. The main generator of hydraulic pulses is a combination of a converging tube, a critical hole, and a diffuser arranged in series. EFFECT: higher efficiency. 4 cl, 4 dwg
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