HYDRAULIC VIBRATOR FOR TREATING BOTTOM-HOLE ZONE OF WELL Russian patent published in 1998 - IPC

FIELD: oil production industry. SUBSTANCE: device has body with passage for fluid flow. Used as locking member is ball which periodically closes bore section of passage. Ball moves inside passage between screen located in lower part of body passage and seat provided with overflow holes and located in its upper part. Device is lowered down into producing string by pump-compressor pipes. At injection of liquid, ball from its initial position on screen is carried by fluid flow and closes its seat. Liquid continues flowing only through overflow holes. Speed of fluid flow drops, action on ball is reduced, and under its own weight ball falls down to screen. Then, cycle is repeated and this is accompanied with generation of hydraulic pressure pulses. EFFECT: high efficiency. 1 dwg