Cutting structure for roller cone drill bits

Details Cutting structure for roller cone drill bits Cutting structure for roller cone drill bits

E - Fixed Constructions

21

B

E21B 10/16 (2006.01)

Patent

CA 2398253

The invention is directed to a roller cone drill for drilling earth formations and a method of using the same. The drill bit includes a bit body and a plurality of roller cones attached to the bit body and able to rotate with respect to the bit body. The drill bit further includes a plurality of cutting elements disposed on each of the roller cones, an offset of at least about 0.375 inches; and a journal angle less than about thirty degrees. In one embodiment, the drill bit includes three roller cones. In another embodiment, the cutting elements of the bit are arranged on each cone so that cutting elements on adjacent cones intermesh between the cones.

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