Mwd surface signal detector having enhanced acoustic...

Details Mwd surface signal detector having enhanced acoustic... Mwd surface signal detector having enhanced acoustic...

E - Fixed Constructions

21

B

E21B 47/18 (2006.01)

Patent

CA 2156223

The acoustic detector in a mud pulse telemetry system includes a one dimensional waveguide disposed between a pressure transducer and a conduit carrying drilling fluid to a drill string. The waveguide, which may include a flexible hydraulic hose, increases the amplitude of the acoustic mud pulse signal received at the transducer located at the termination end by a factor of two or more. In addition, the waveguide may be substantially filled with a fluid having a viscosity higher than the viscosity of the drilling fluid so as to provide a means to dampen high frequency noise, and thereby improve the signal-to-noise ratio at the pressure transducer.

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