DEVICE FOR CLEANING AND VIBRATION TREATMENT OF WELL WALLS Russian patent published in 1995 - IPC

FIELD: oil producing industry. SUBSTANCE: device for cleaning and vibration treatment of well walls generates pressure pulses of ultrasonic frequency that in combination with rotary-forward flow of fluid promotes efficient cleaning of well walls from resinous and paraffin deposits, corroded metal scale separated from casing string. Vibration treatment of bottom-hole formation zone assists in removal from well of solid particles of metal and nonmetal origin without use of drilling mud with high holding properties. Device for cleaning and vibration treatment of well walls has body accommodating tubes installed eccentrically whose axes are parallel to body axis. Tubes have tangential inlet openings in the middle which are hydraulic communicated with body inner space, and outlet openings of the tube ends are hydraulically communicated with body outer space. Attached concentrically to body bottom is magnetic branch pipe with seat for drop ball, and branch pipe with casing of junk basket. EFFECT: high degree of cleaning with simplified design. 3 dwg