Noise attenuation apparatus for borehole telemetry

Details Noise attenuation apparatus for borehole telemetry Noise attenuation apparatus for borehole telemetry

E - Fixed Constructions

21

B

E21B 47/18 (2006.01) G01V 11/00 (2006.01)

Patent

CA 2497487

A surface mud pipeline system is described with a mechanical acoustic filter (1245) tuned to a predetermined frequency band so as to attenuate pump noise (132) within this band. The filter can be combined with a Venturi constriction to provide enhanced attenuation and is used to improve signal transmission of a mud pulse telemetry system (113-2).

l'invention concerne un système de tubage pour boue de surface comportant un filtre acoustique mécanique (1245) accordé à une bande de fréquence prédéterminée de manière à atténuer le bruit de pompe (132) dans les limites de cette bande. Ce filtre peut être associé à un étranglement de Venturi pour améliorer l'atténuation et s'avère utile pour améliorer la transmission de signaux d'un système de télémétrie par impulsions dans la boue (113-2).

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