DOWN-HOLE SOURCE FOR CREATING PULSES Russian patent published in 1999 - IPC

FIELD: machinery and equipment for mining industry. SUBSTANCE: invention, particularly, relates to devices intended for intensification of down-well recovery of liquid such as fresh water and mineral water. Down-hole source for creating pulses incorporates adapter with passage for delivery of washing fluid, and gas valve. Tubular body has shut-off valve and internal pipe. Internal pipe is connected by its upper end to adapter with creation of gas-accumulator chamber communicating with surrounding medium through valve. Upper part of gas-accumulator chamber is provided with perforated sump for location of chemical reagent. Adapter is made with hermetically-sealed hole for charging. Shut-off valve is made in the form of nipple part of tubular body with successively located on its internal surface from top to bottom of following components: stop, radial exhaust openings, and circular bore. Circular piston has radial passages. Seated in these radial passages are locking balls which can successively align and interact with internal walls of circular bore in nipple part of tubular body, and circular grooving in external cylindrical surface of internal piston which is spring-biased relative to tubular body. Passage of internal pipe can be provided with non-return valve located below gas-accumulator chamber. Application of aforesaid invention allows for enhancing efficiency of pulsing action on deep zones of reservoirs by generating gas used for increasing its pressure in gas-accumulator at lowering of pulse source into well which is filled with water and also for its making up at losses during pulsing treatment of water-bearing horizons. EFFECT: higher efficiency. 3 cl, 3 dwg