Measuring-while-drilling telemetry apparatus and method

Details Measuring-while-drilling telemetry apparatus and method Measuring-while-drilling telemetry apparatus and method

G - Physics

08

C

G08C 23/00 (2006.01) E21B 47/18 (2006.01) H04L 27/18 (2006.01)

Patent

CA 2119986

A mud pulse telemetry system for use as part of a measuring-while- drilling system is disclosed. The telemetry system utilizes modern digital communications techniques, including multi-level coding. The uplink transmitter includes a continuous-value mud pulse transmitter that is controlled at least in part by utilizing feedback signals whereby the mud pulse transmitter operation is linear. A downlink system employs the same type transmitter. The uplink and downlink signals are frequency-multiplexed for concurrent transmission.

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