ACOUSTIC TELEMETRY TRANSCEIVER

摘要

The invention concerns an acoustic telemetry system comprising an apparatusthat includes a piezoelectric transducer (210) to generate an acoustic signalthat is modulate along a mandrel (204), and a backing mass (208) positionedadjacent to the piezoelectric transducer (210) and restrained fromapproximately all lateral movement relative to an axis of the drill string.