METHOD OF ELIMINATION OF GAS AND WATER CROSSFLOWS IN OIL WELL ANNULAR SPACES Russian patent published in 2003 - IPC

FIELD: oil producing industry. SUBSTANCE: method includes lowering of filling pipe string into well; supply of isolating material to channels of crossflows; lowering of acoustic radiator into filling pipe string; stimulation of isolating material with ultrasonic vibrations. Acoustic radiator is used with inclined waveguides and lowered to depth of upper holes of perforation of production string. Waveguides are oriented at preset angle to well wall in direction of supply of isolating material to fractures of crossflows in annular space. Ultrasonic vibrations facilitate penetration of isolating material through fractures upward and do not initiate penetration of this material into formation over entire interval of perforation below acoustic radiator. EFFECT: higher efficiency of method of elimination of gas and water crossflows in oil well annular spaces above well perforation interval without penetration of isolating material into formation over entire perforation interval. 1 dwg, 1 ex