Method and system for averting or mitigating undesirable...

E - Fixed Constructions – 21 – B

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E21B 44/00 (2006.01)

Patent

CA 2509704

A method and system for averting or mitigating undesirable drilling events during a drilling process is disclosed. The state of the drilling rig is detected, preferably automatically, based on surface and/or downhole measurement data. One or more undesirable drilling events are detected by correlating the acquired measurement data with the detected state. A drilling rig action is determined which averts or mitigates a detected undesirable drilling event. Finally, the drilling process is overridden by commanding performance of the action. The algorithm used in detecting the most likely rig state is preferably probabilistic in nature, and is even more preferably based on particle filtering techniques.

L'invention concerne un procédé et un système permettant de prévenir ou de limiter des événements de forage non désirés pendant un processus de forage. L'état de l'appareil de forage est détecté, de préférence automatiquement, en fonction des données de mesure de surface et/ou de fond de trou. Un ou plusieurs événements de forage non désirés sont détectés par corrélation des données de mesure acquises avec l'état détecté. Une action d'appareil de forage est déterminée et prévient ou limite un événement de forage non désiré détecté. Enfin, le processus de forage est annulé par commande de l'exécution de l'action. L'algorithme utilisé dans la détection de l'état de l'appareil le plus probable est de préférence de nature probabiliste, et est idéalement fondé sur des techniques de filtration de particules.

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