METHOD OF TREATMENT OF CRITICAL AREA OF FORMATION AND GEAR FOR ITS REALIZATION Russian patent published in 2003 - IPC

FIELD: oil production, increased efficiency of wells under conditions of pollution of critical area of formation with paraffin, asphalt-resin, slurry and other deposits. SUBSTANCE: method includes sinking of downhole technological equipment with source of thermal-gas-chemical stimulation, burning of the latter in treated interval with formation of gas of enhanced pressure and temperature, drawdown effect and withdrawal of portion of fluid from critical area of formation. Supersonic speed of release of gas and impact pressure fluctuations across outlet by constriction of gas flow to critical sections are created by burning of source of thermal-gas-chemical stimulation. At same time critical area of formation is subjected to elastic vibrations. Gear for realization of method include hollow body with source of thermal-gas-chemical stimulation and igniter connected with the aid of electric wires to ground control desk, reheat chamber, logging cable, cable head. Slits are cut in body of reheat chamber. Gear is equipped with acceleration chamber which upper end has supersonic nozzle. Lower end of acceleration chamber is linked to body of source of thermal-gas-chemical stimulation and to resonance chamber closed from above and connected to cable head. Upper end of acceleration chamber and lower end of resonance chamber are inserted into reheat chamber and are matched with its slits. EFFECT: enhanced efficiency of treatment of critical area of formation and widened functional capabilities of method and gear. 27 cl, 2 dwg