Drill bit inserts with interruption in gradient of properties

Details Drill bit inserts with interruption in gradient of properties Drill bit inserts with interruption in gradient of properties

E - Fixed Constructions

21

B

E21B 10/46 (2006.01) E21B 10/56 (2006.01)

Patent

CA 2305813

A cutter element for use in a drill bit, comprising a substrate and a plurality of layers thereon. The substrate comprises a grip portion and an extending portion. The layers are applied to the extending portion such that at least one of the layers is harder than at least one of the layers above it. The layers can include one or more layers of polycrystalline diamond and can include a layer in which the composition of the material changes with distance from the substrate.

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