| 摘要 |
Disclosed is a cleaning apparatus for any structure where caking of particles may affect productivity, particularly a subterranean formation or wellbore, characterized in that it requires no external electrical source and includes the following elements: At least one ultrasonic energy sonde for converting an alternating electric power signal at a selected voltage into ultrasound energy; At least one ultrasonic generator that conditions electrical power to the signal required to energize the ultrasonic energy sonde; At least one apparatus which converts mechanical energy into electrical energy, preferably a piezoelectric generator, in a configuration and with appropriate circuitry to provide electrical power to said ultrasonic generator(s); and A means for applying mechanical force to said apparatus to generate electricity to power said generator.
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