Method for improved well control with a downhole device

E - Fixed Constructions – 21 – B

Patent

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E21B 21/10 (2006.01) E21B 33/06 (2006.01) E21B 34/06 (2006.01)

Patent

CA 2656619

A drilling system includes a downhole well control device that can be used to control out-of-norm wellbore conditions. The downhole well control device can control one or more selected fluid parameters. The well control device in cooperation or independent of surface devices exerts control over one or more drilling or formation parameters to manage an out-of-norm wellbore condition. An exemplary well control device hydraulically isolates one or more sections of a wellbore by selectively blocking fluid flow in a pipe bore and an annulus. The control device also selectively flows fluid from the pipe bore to the annulus. A communication device provides on-way or bi-directional signal and / or data transfer between the controller(s), surface personnel and the well control device. Exemplary application of the well control device include controlling a well kick, controlling drilling fluid being lost to the formation and controlling a simultaneous kick and loss.

La présente invention concerne un système de forage qui comprend un dispositif de commande de fond de puits qui peut être utilisé pour commander des conditions de puits de forage hors normes. Le dispositif de commande de fond de puits peut commander un ou plusieurs paramètres de fluide choisis. Le dispositif de commande de puits en coopération avec ou indépendant de dispositifs de surface exerce une commande sur un ou plusieurs paramètres de forage ou de formation afin de gérer une condition de puits de forage hors normes. Un exemple de dispositif de commande de puits isole de manière hydraulique une ou plusieurs sections d'un puits de forage en bloquant de manière sélective un flux de fluide dans un alésage de tuyau et un espace annulaire. Le dispositif de commande fait aussi de manière sélective circuler du fluide depuis l'alésage de tuyau vers l'espace annulaire. Un dispositif de communication fournit un signal et/ou un transfert de données à sens unique ou bidirectionnel entre le dispositif de commande ou les dispositifs de commande, le personnel en surface et le dispositif de commande de puits. Un exemple d'application du dispositif de commande de puits comprend de commander un ébranlement du puits, de commander le fluide de forage perdu par la formation et de commander un ébranlement et une perte simultanée.

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