FIELD: oil producing industry; recovery of liquids from wells. SUBSTANCE: proposed unit is designed for bottom hole treatment. Method can be used for recovery of liquid media. Active medium is delivered into hydraulic pulse device, and well underpacker zone is subjected to treatment at hydraulic pulse cavitation duty. Treatment carried out, packer is installed in well, and depression insert is installed after which liquid medium with particles pumped out of underpacker zone by jet device. Pump - ejector unit is furnished additionally with packer, central check valve, hydraulic pulse device installed lower than packer, system of check valves and locking insert. Check valve is installed in locking insert, and locking insert is installed for replacement by depression insert. EFFECT: facilitated recovery of liquids. 2 cl, 2 dwg
