FIELD: oil industry. SUBSTANCE: body of proposed gear comes in the form of tube and is connected to cable. Heaters are manufactured in the form of inductors placed into insulators put into heat pipe-line with space having ferromagnetic shells and are positioned on butts of upper and lower parts of tube. Plane of laying of turns of inductor in cross-section is perpendicular to butt of body. EFFECT: simplified removal of gear from well. 1 dwg
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