DEVICE FOR PROVIDING HYDRODYNAMIC INFLUENCE ON WELL WALLS Russian patent published in 2004 - IPC

FIELD: technology for influencing productive layers. SUBSTANCE: device has body, connected to pipeline with or without rotating support. Inside the body consecutively in top-down direction fluid stream cavitation device, stream guiding and separation device and output stream interruption device are located. Fluid stream cavitation device is made in form of self-vibrating system capable of receiving uninterruptible supply of stream disruptions in pulsing mode with circular influence on well walls by means of periodical full or partial interruption of said stream. EFFECT: layer fluids influx and layer acceleration intensification, porous layers thinning, cleaning of obstructions and deposits in filters and pipes, creation of enclosures in well walls by means of rock erosion with fluid streams having cavitation effect. 6 cl, 6 dwg