Transmission of data in boreholes
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United States of America Patent
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Jun 28, 2005
Issued Date -
N/A
app pub date -
Nov 25, 1997
filing date -
Sep 29, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Data is transmitted along a borehole containing a drill stem (2) by means of a transmitter (6) which converts electric data signals to acoustic signals propagating along the drill stem (2). The acoustic signals are converted back to electric form by a receiver (12) which also processes the signals. In the preferred form the signals are stored in a receiver memory (15) for subsequent retrieval using a pick-up tool (5) lowered into the borehole. The system is particularly useful in moving data past an obstruction such as a shut-in valve (4).
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