INVESTIGATION INTO DYNAMICS OF DOWNHOLE Unbalanced-TYPE VIBRatiOn SOURCE OPERATION
Wave-type oscillations generated by downhole unbalanced seismic source are studied on the laboratory test stand. The mode of source operation with an inner chamber filled with fluid is investigated at shaft rotation frequency ranged from 3 to 8 Hz. The difference of rotation frequencies of vibration source and magnetic field of asynchronous motor stator is determined. The amplitude-frequency characteristic of vibration source in the low-frequency range is obtained.