Thermal Processes in Electromagnetic Percussion Assembly of Downhole Pulse Vibration Exciter
B. F. Simonov, A. O. Kordubailo, A. E. Grachev, A. A. Leutkin, E. M. Pozdnyakova
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Body, piston, coil, electromagnet, expansion gap, average current, thermal conductivity, heat transfer
Abstract
The authors investigate thermal processes in an electromagnetic percussion assembly of a downhole pulse vibration exciter at the rated energy mode in the naturally cooled air environment and at different methods of heat energy transmission from the coil to the body. The interrelation is found between the coil and body temperature, external cooling, duty cycle and the coil-body expansion gap when it is filled with air or oil. Based on the obtained results, the duty cycle of the vibration exciter in a well is calculated when the body of the electromagnetic percussion assembly is cooled with flow water.
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