Downhole assembly and cutter assembly

Details Downhole assembly and cutter assembly Downhole assembly and cutter assembly

E - Fixed Constructions

21

B

E21B 17/10 (2006.01) E21B 10/26 (2006.01) E21B 37/02 (2006.01)

Patent

CA 2641391

This invention relates to a downhole assembly (10) and to a cutter assembly, and in particular to a downhole assembly including an apparatus for breaking up large-scale material which is present behind a drill bit (12) , and to a cutter assembly for use in such a downhole assembly. The downhole assembly is suitably for use in a drillstring, the downhole assembly comprising a drill bit, a sensitive component (20) , and at least one rotatable set of cutter blades (24) located between the drill bit and the sensitive component.

Cette invention concerne un ensemble de forage descendant (10) et un ensemble de havage, et en particulier un ensemble de forage descendant comprenant un appareil pour casser la matière massive qui est présente derrière un outil de forage (12), et un ensemble de havage à des fins d'utilisation dans un tel ensemble de forage descendant. L'ensemble de forage descendant est adapté à des fins d'utilisation dans un train de tiges de forage, l'ensemble de forage descendant comportant un outil de forage, un composant sensitif (20), et au moins un ensemble rotatif de fraises (24) se trouvant entre l'outil de forage et le composant sensitif.

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