| 摘要 |
The inventive acoustic downhole device relates to devices for producing acoustical action on productive formations, drilling areas for increasing the flowrate of oil and gas wells and during repair and insulation operations. Said invention makes it possible to increase the acoustic power by automatically tuning frequency and phase equalisation in such a way that the resonance frequency dispersion of piezoelectric converters in each section is compensated. Said acoustic downhole device is powered by a direct-current power supply and consists of several independent sections operating on the natural resonance frequency thereof. Each section is located in a sealed body and comprises a service power supply, filter module, protective module, master generator, AFC module and a phase adjuster for compensating the resonance frequency dispersion of the piezoelectric converters, a power module, current transformer, adder, feedback sensor, at least two piezoelectric converters which are pre-selected according to a resonance frequency and each of which is provided with its own control channel consisting of the feedback sensor, phase adjuster, power module and the current transformer. |
