Patent ID: 8881848
Filing Date: 2014-11-11
Classification: E21B

Abstract:
1. A drill bit ( 100 ) for making a hole in a subterranean formation, comprising: a bit body defining a centerline axis ( 150 ) about which said bit body rotates while drilling; a first blade ( 110 ) fixed to said bit body defining a leading edge ( 112 ); a cutter disc ( 120 ) rotatably mounted to the first blade so as to rotate about a cutter disc axis ( 125 ) that does not lie within a plane that is radially oriented with respect to said centerline axis, that is substantially perpendicular to a radial of said centerline axis, and that is substantially perpendicular to the centerline axis; and a first plurality of cutters ( 140 , 142 ) fixed to said cutter disc; wherein the cutter disc is configured to rotatably present the first plurality of cutters to the formation during drilling.