Coiled tubing conveyed milling

Details Coiled tubing conveyed milling Coiled tubing conveyed milling

E - Fixed Constructions

21

B

E21B 27/00 (2006.01) E21B 29/00 (2006.01)

Patent

CA 2576432

Milling in casing that is over 4-1/2 inches is done with coiled tubing that is anchored against torque reaction. An improved debris catcher is part of the bottom hole assembly to capture cuttings from the milling. A thruster can be used to maintain weight on the mill during the milling. The coiled tubing supports a mud motor to drive the mill. Return fluid is separated from the cuttings and returned to the surface.

Le broyage dans des cuvelages de dimension supérieure à 4,5 pouces s'effectue au moyen d'un tubage enroulé qui est ancré pour résister à la réaction de torsion. Un collecteur des débris amélioré fait partie de l'appareil de fond de trou pour recueillir les débris de coupes provenant de l'opération de broyage. Un appareil de poussée peut être utilisé pour exercer du poids sur le broyeur pendant l'opération de broyage. Le tubage enroulé sert à maintenir un moteur de fond qui entraîne le broyeur. Les liquides de retour sont séparés des débris de coupes et remontés à la surface.

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