PULSE ROTOR HYDRO-MONITOR INSTALLATION "IRGA" Russian patent published in 2010 - IPC E21B43/25 

FIELD: oil and gas production.

SUBSTANCE: installation consists of hollow metal case rigidly fixed on flow string. The case corresponds to a cartridge with orifices in walls. Further, the installation consists of a rotating around the case rotor with orifices at the same level with orifices of the case and equipped with hydro-monitor headpieces. An impeller is rigidly fixed in the rotor. According to the invention a confusor nozzle is installed inside the case in its upper part for one part of flow; for another, main part of flow, the confusor nozzle with its external wall and internal wall of the case forms circular space. A movable barrier is positioned under the confusor nozzle. The barrier is equipped with a flexible element and semi-sphere concave surface to turn part of flow from the confusor nozzle to a side opposite to main flow and to shut it off, thus creating hydraulic impacts. Power of impacts is specified with dimension of a circular gap between the external wall of the confusor nozzle and internal wall of the case, with height of the movable barrier and with pressure of fluid flow.

EFFECT: raised efficiency of effecting bottomhole of reservoir due to increased power of hydraulic impacts and to their control.

3 cl, 1 dwg