DEVICE FOR CLEANING INNER SURFACES OF OIL WELLS Russian patent published in 2004 - IPC

FIELD: oil extraction industry. SUBSTANCE: device has sealed, pipe-shaped, current conducting, composite body. Connecting headpiece is made for members of body, has detachable isolated from it assembly for electrodes and is mounted inside the body with possibility of separation of its hollow onto operation and auxiliary chambers. Electrode with current conducting headpiece is immersed into electroconductive solution at lower portion of operation chamber. Also provided is electrode in auxiliary chamber, by one end connected to current supplying cable, and by other end through detachable isolated assembly is connected to electrode of operation chamber. In connecting headpiece channels are made with possibility of connecting operation chamber to auxiliary chamber. EFFECT: unhindered movement of device on forward and backward directions, easier cleaning of the well, higher productiveness due to redistribution of heat energy and assuring even heating of the body along its whole surface. 2 dwg