Acoustic telemetry systems and methods with surface noise...

G - Physics – 01 – V

Patent

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G01V 1/00 (2006.01)

Patent

CA 2580691

Acoustic telemetry systems and methods with surface noise cancellation. One illustrative embodiment may include an acoustic telemetry system comprising a transmitter (28) configured to generate an acoustic information signal that propagates along a drillstring (8), and a receiver (200) configured to detect an acoustic receive signal from the drillstring and a noise signal from a surface environment. The receiver operates on the acoustic receive signal and the noise signal to produce a modified signal indicative of the acoustic information signal and having a reduced noise content relative to the acoustic receive signal.

L'invention concerne des systèmes de télémétrie acoustique et des procédés de suppression du bruit de surface. L'un des modes de réalisation de cette invention peut comprendre un système de télémétrie acoustique doté d'un transmetteur (28) configuré de manière à générer un signal d'information acoustique qui se propage le long d'un train de tige (8), et d'un récepteur (200) conçu de manière à détecter un signal de réception acoustique provenant du train de tige ainsi qu'un signal de bruit provenant d'un environnement de surface. Le récepteur agit sur le signal de réception acoustique et le signal de bruit afin de produire un signal modifié indicatif du signal d'information acoustique avec un contenu de bruit réduit par rapport au signal de réception acoustique.

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