DEVICE FOR OIL PRODUCTION AND WELL BOTTOM ZONE TREATMENT Russian patent published in 2007 - IPC E21B43/18 

FIELD: mining and oil production, particularly to develop and rework producing well, namely in stimulate reservoir fluid inflow.

SUBSTANCE: device comprises cylindrical body arranged at well bottom level and closed from lower end. The cylindrical body has orifices made in upper part thereof. Device has check valve installed in sealed lower end part of cylindrical body so that the check valve opens as liquid discharges from the body, as well as supplementary cylinder having upper end connected to lower end of sucker-rod pump arranged in well over cylindrical body and supplementary cylinder. The device includes piston installed inside supplementary cylinder and connected to sucker-rod pump piston through bar and piston installed in cylindrical body so that the piston may reciprocate inside the body. The piston has orifices aligned with that of cylindrical body as piston is installed in upper position. Upper end of cylindrical body is connected to lower end of supplementary cylinder through high-pressure hose to transmit additional vibration to productive reservoir due to cylindrical body striking against inner casing pipe walls caused by hydraulic impacts accompanying implosion effect appeared as piston and cylindrical body orifices are in register with each other.

EFFECT: possibility of shock-wave well bottom treatment simultaneously with oil production without energy transfer to hydraulic pulse source by means of rigid mechanical coupling.

1 dwg