FIELD: oil industry.
SUBSTANCE: invention relates to the technique of measuring longitudinal vibrations propagating along a drill string during vertical seismic profiling during geophysical operations. Disclosed is a device for measuring vibration of a downhole tool, the latter comprises hydromechanical vibration transducer arranged in drill string and comprising case, vessel, shaft, adjusting sleeve and sealing rings. At that, the device is additionally equipped with a flat metal plate, which perceives the mechanical action of the shaft of the hydromechanical sensor, a superhigh-frequency generator of electromagnetic oscillations, a valve, T-bend, receiving-transmitting antenna, DC power supply unit, amplitude detector and information signal amplitude meter. Output of the power supply unit is connected to the power supply input of the microwave generator, the output of which is connected to the input of the valve, which is connected by the output to the first arm of the T-bend. Second arm of the T-bend is connected to a transceiving antenna designed to transmit an electromagnetic signal to a flat metal plate and receive a reflected signal from it. Third arm of the T-bend is connected to the input of the amplitude detector, the output of which is connected to the input of the information signal amplitude meter.
EFFECT: increased sensitivity of vibration measurement.
1 cl, 1 dwg
