Dual channel downhole telemetry

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 47/12 (2012.01) E21B 47/18 (2012.01)

Patent

CA 2617328

The present disclosure provides several methods for selecting and transmitting information from downhole using more than one channel of communication wherein data streams transmitted up each communications channel are each independently interpretable without reference to data provided up the other of the communications channels. Preferred embodiments incorporate the use of a combination of at least two of mud-based telemetry, tubular-based telemetry, and electromagnetic telemetry to achieve improved results and take advantage of opportunities presented by the differences between the different channels of communication.

La présente invention comprend plusieurs procédés de sélection et de transmission d'informations à partir d'un trou de forage au moyen de plus d'un canal de communication. Les données acheminées par un canal de communication peuvent être interprétées de façon indépendante, sans faire appel aux données acheminées par l'autre canal. Dans des modes de réalisation privilégiés de cette invention, on utilise une combinaison d'au moins deux méthodes de télémétrie fondée sur les boues, la télémétrie fondée sur les tubes et la télémétrie électromagnétique, ce qui permet d'obtenir de meilleurs résultats et de tirer parti des différences entre les différents canaux de communication.

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