System and method for autonomously performing a downhole...

E - Fixed Constructions – 21 – B

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E21B 44/00 (2006.01) E21B 23/00 (2006.01) E21B 47/00 (2006.01)

Patent

CA 2473495

An autonomous system for performing a well operation at a predetermined location in a wellbore comprises a tool string having at least one well tool, a motive device for traversing the wellbore, and a control system adapted to position the tool string near the predetermined location. The control system comprises (i) a sensing system for detecting mass irregularities in the wellbore and (ii) a processor system having a processor with memory for storing at least one well log. The processor acts under programmed instructions to compare sensor signals to the stored well log to determine a tool string position in the wellbore. The control system also contains circuits for controlling the operation of the well tool and the motive device.

L'invention a trait à un système autonome permettant de réaliser une opération de puits à un emplacement prédéterminé dans un forage. Ledit système comprend un train d'outils comportant au moins un outil de puits, un dispositif moteur destiné à traverser le forage, et un système de commande adapté de manière à placer le train d'outils à proximité de l'emplacement prédéterminé. Le système de commande comprend (i) un système de détection permettant de détecter les irrégularités de masse dans le forage, et (ii) un système de processeur possédant un processeur doté d'une mémoire permettant de stocker au moins une diagraphie de puits. Le processeur fonctionne selon des instructions programmées, afin de comparer les signaux émis par le détecteur à la diagraphie de puits stockée et déterminer ainsi une position de train d'outils dans le forage. Le système de commande comporte également des circuits permettant de commander le fonctionnement de l'outil de puits et le dispositif moteur.

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