| 摘要 |
The system is described in connection with the control of downhole oil well drilling tools or instruments used in the oil drilling industry. Control wiring extends through the drill pipe employing magnetic coupling between pipe sections. Signal enforcers are provided at predetermined positions along the drill pipe to reinforce all signals communicated via the control wiring. These signal enforcers or repeaters are powered by an acoustic power transmission system which also provides operating power for the tools and instrumentation in the bottom of the well. The power transmission system includes an acoustic power generator or preferably a pair thereof disposed at the top of the drill pipe for establishing a plane acoustic pressure wave that propagates down the drill pipe, and one or more acoustic energy converters including means for converting a portion of the pressure wave to a DC voltage for powering each repeater. One or more converters at the bottom of the well are also used for powering tools and instrumentation.
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