Nutating single cone drill bit

Details Nutating single cone drill bit Nutating single cone drill bit

E - Fixed Constructions

21

B

E21B 11/02 (2006.01) E21B 7/26 (2006.01)

Patent

CA 2522019

The present invention includes a nutating single cone drill bit which rolls and crushes the bore face without dragging cutters which are not directly engaging the borehole thereby reducing wear and torque on the drill string, and which because of the large thrust bearings can withstand large compressive loading of the drill string assembly on the bit.

La présente invention a trait à un trépan conique de nutation qui réalise le laminage et le broyage de la face du trou de forage sans haveuses traînantes qui ne sont pas en engagement direct avec le trou de forage réduisant ainsi l'usure et le couple sur le train de tiges, et qui grâce à de larges paliers de butée peuvent supporter la charge de compression de l'ensemble de train de tiges sur le trépan.

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