Method and apparatus for data communication with an underground instrument package
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United States of America Patent
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Apr 29, 2003
Grant Date -
N/A
app pub date -
Apr 7, 2000
filing date -
Apr 8, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A data communication system is provided for communicating with an underground instrument package positioned on a drilling apparatus. The drilling apparatus has an insulated section between first and second conductive sections. The system includes a power supply connected to the first conductive section of the drilling apparatus and to the ground. A receiver measures current flowing through the power supply. An electrical path is provided between the first and second conductive sections of the drilling apparatus. A switch provided in the electrical path opens and closes the electrical path in response to the data generated by the instrument package.
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