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Acoustic telemetry, with multiple nodes in drillstring, used to achieve distributed MWD

Unattended acoustic telemetry in real-time drilling environments can now include multiple nodes in the drillstring. We utilize a primary tool near the drill bit that transmits telemetry and sensor/directional information with one or more acoustic transponding devices at other sites along the drillstring, these incorporating both the primary signal and additional information from their own local sensors...

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