WELL PULSER Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: this relates to devices intended for intensification of well recovery of liquid materials such as fresh and mineral water. Well pulser has adapter with central passage for supply of liquid and side gas-supply passage with non-return valves installed in them. Connected to adapter are concentrically located relative to each other tubular body having shut-off valve in its lower part, and internal pipe functioning as gas-accumulator chamber. Space of gas-accumulator chamber is connected with side passage of adapter. Annular space is connected with central passage of adapter. Gas-accumulator chamber is provided with release valve installed in its lower part. Release valve of gas-accumulator chamber is made of material of specific weight less than of washing liquid. Release valve can be made in the form of turning shutter. Shut-off valve of well pulsator is made in the form of circular resilient member fitted over tapered rigid end-piece of diameter increasing upward and having limiting stops at top and bottom. Rigid end-piece is secured on end of pusher rod spring-biased relative to tubular body in device used for return of shut-off valve to initial position. It displaces relative to double-side seat secured on walls of tubular body above passages going into well. Lower part of release valve of gas-accumulator chamber and upper part of shut-off valve are provided with self-closing device. Application of aforesaid embodiment of well pulser allows for enhancing efficiency of pulsing action. EFFECT: higher efficiency. 4 cl, 10 dwg