PULSATOR-VIBRATOR Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: pulsator-vibrator has body with calibrated bush installed in it. Installed on bush by means of pin is crank which is connected with butterfly valve. Also provided are radial clamp, striker, clamping spring. Nozzle with taper portion can interact with radial clamp. Crank is provided with striker. Nozzle performs reciprocating motion and this is accompanied with extension of radial clamp. Butterfly valve is opened and closed during this procedure. Striker periodically inflicts blows on striking pin which in its turn inflicts blows in perforated zone. Application of aforesaid pulsator-vibrator increases efficiency of treating bottom-hole zone of oil producing wells by liquid. EFFECT: higher efficiency. 1 cl