Combined logging and drilling system

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 17/02 (2006.01) E21B 17/00 (2006.01) E21B 47/01 (2006.01)

Patent

CA 2399132

A system is provided for drilling and logging of a wellbore formed in an earth formation. The system comprises a drill string provided with an external recess extending in longitudinal direction of the drill string, a fluid passage for flow of drilling fluid from an upper end of the drill string to a lower end thereof, and a port providing fluid communication between the fluid passage and the recess. The system further comprises a logging tool string capable of passing through the fluid passage and from the fluid passage via the port into the recess, and a removable closure element adapted to selectively close the port.

L'invention concerne un système permettant d'effectuer le forage et la diagraphie d'un puits de forage réalisé dans une formation géologique. Ce système comprend une colonne de forage pourvue d'un évidement extérieur s'étendant dans la direction longitudinale de la colonne, un passage de fluide destiné à l'écoulement des liquides de forage d'une extrémité supérieure de la colonne de forage à une extrémité inférieure de cette dernière, et un orifice assurant la communication fluidique entre le passage de fluide et l'évidement. Le système de l'invention comprend également une colonne pour un instrument de diagraphie pouvant passer à travers le passage de fluide, et de là jusqu'à l'évidement par l'orifice, ainsi qu'un élément de fermeture amovible conçu pour fermer l'orifice de manière sélective.

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