Roller cone drill bit having designed walk characteristics

Details Roller cone drill bit having designed walk characteristics Roller cone drill bit having designed walk characteristics

E - Fixed Constructions

21

B

E21B 10/08 (2006.01) B23P 15/28 (2006.01) E21B 10/16 (2006.01)

Patent

CA 2417307

A roller cone drill bit having selected left hand walk is disclosed. The bit includes a bit body adapted to couple to a drill string, and a plurality of legs depending from the bit body. Each leg has a roller cone rotatably mounted thereon. Each cone includes a plurality of cutting elements thereon. At least one cone has a nose point of its profile displaced radially inward with respect to a nose point of the profile of the other cones. A roller cone drill bit having selected right hand walk is also disclosed. The bit include a bit body adapted to couple to a drill string, and a plurality of legs depending from the bit body. Each leg has a roller cone rotatably mounted thereon, each cone including a plurality of cutting elements thereon defining a profile. At least one cone has a nose point of the profile displaced radially outward with respect to a nose point of the profile of the other cones.

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