Bowed crests for milled tooth bits

Details Bowed crests for milled tooth bits Bowed crests for milled tooth bits

E - Fixed Constructions

21

B

E21B 10/50 (2006.01) E21B 10/08 (2006.01) E21B 10/16 (2006.01) E21B 10/52 (2006.01)

Patent

CA 2398412

A drill bit comprising a bit body, at least one roller cone rotatably mounted on the bit body. The cone has a plurality of milled teeth at selected locations on the cone. At least one of the milled teeth comprises a substrate having a convex crest and a layer of hardfacing applied to said convex crest. The convex crest is adapted to produce at least one of a convex axial stress distribution, a substantially even axial stress distribution, and a substantially smooth axial stress distribution.

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