Borehole acoustic telemetry system
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United States of America Patent
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-
Oct 6, 1981
Grant Date -
N/A
app pub date -
Aug 10, 1979
filing date -
Aug 10, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a borehole acoustic telemetry system for acoustically transmitting data over a pipe suspended in a borehole, the level of noise in the data stream is inherently high, making the use of precise frequencies advantageous to provide useful data. A first transmitter in the system operates at a precise frequency to transmit a signal over the pipe where it is received by a receive and retransmit circuit path. Components in the receive and retransmit section filter and amplify a data component of the signal and retransmit the data signal at a precise frequency. Crystal controlled oscillator clocks are operated in the system at a same frequency in the transmitter and receiver-retransmitter to insure precise frequency control of the system.
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