METHOD AND DEVICE FOR CLEARING WELLS FROM PARAFFIN-RESIN DEPOSITS Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: clearing oil wells from paraffin-resin deposits is also needed for environment pollution control in process of operating oil wells. Clearing of lifting tubes is effected by raising flow of fluids such as reaction products heated in bottom-hole zone of reservoirs using heat emitted as result of interaction between reagents injected into bottom-hole zone of reservoir. Device for realizing this method simplifies technological process and allows product taken from well being treated to be used as working agent. Device has ejector with its low-pressure chamber being connected with separator with tube space of well, and ejector outlet is connected with annular space. High-pressure nozzle of ejector is connected with high-pressure mobile unit. EFFECT: high efficiency. 3 cl, 2 dwg