Wellbore cleaning method and apparatus

Details Wellbore cleaning method and apparatus Wellbore cleaning method and apparatus

E - Fixed Constructions

21

B

E21B 37/02 (2006.01) E21B 37/04 (2006.01)

Patent

CA 2612092

This invention relates to well cleaning methods and apparatus. In particular, this invention relates to a method of drilling and cleaning a wellbore. In one embodiment of the invention, a method of drilling and cleaning a wellbore (12) is disclosed. The method comprises the steps of providing a drill string (10) having a drill bit (28) and a cleaning tool (24) with selectively activatable cleaning members (34); drilling a wellbore using the drill bit while maintaining the cleaning members in a deactivated position; and pulling the drill string from the wellbore with the cleaning members in an activated position, to thereby clean the wellbore. A corresponding cleaning tool is also disclosed.

L'invention concerne des procédés et un appareil de nettoyage de puits. Elle porte notamment sur un procédé de forage et de nettoyage d'un puits de forage. Dans un mode de réalisation, un procédé de forage et de nettoyage d'un puits de forage (12) est décrit. Ce procédé consiste à prévoir un train de forage (10) possédant un trépan (28) et un outil de nettoyage (24) doté d'éléments de nettoyage pouvant être activés sélectivement (34) ; à forer un puits de forage au moyen d'un trépan tout en maintenant les éléments de nettoyage dans une position désactivée ; et à tirer le train de forage du puits alors que les éléments de nettoyage sont dans une position activée, afin de nettoyer ainsi le puits de forage. Un outil de nettoyage correspondant est également décrit.

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