| 摘要 |
The invention provides a downhole telemetry system and a method for diagnosing a downhole telemetry system. A downhole telemetry system includes a plurality of joints of wired drill pipe (118) connected end-to-end, a first repeater sub (132A), and a second repeater sub (132B). 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. |
