Systems and methods for diagnosing a downhole telemetry link
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United States of America Patent
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Feb 14, 2017
Grant Date -
Jul 30, 2015
app pub date -
Jan 23, 2015
filing date -
Jan 27, 2014
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Abstract
Systems and methods for downhole telemetry diagnosis. A downhole telemetry system includes a plurality of joints of wired drill pipe connected end-to-end, a first repeater sub, and a second repeater sub. The first repeater sub is connected to an uphole end of the plurality of joints of wired drill pipe. The second repeater sub connected to a downhole end of the plurality of joints of wired drill pipe. The first repeater sub is configured to transmit a signal into one of the joints of wired drill pipe that is connected to the first repeater sub; to detect energy of the transmitted signal returned to the first repeater sub; to measure duration of the returned energy; and to determine an operational state of the first repeater sub based on the measured duration of the returned energy.
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