Drill bit inserts with zone of compressive residual stress

Details Drill bit inserts with zone of compressive residual stress Drill bit inserts with zone of compressive residual stress

E - Fixed Constructions

21

B

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

Patent

CA 2305812

A cutter element for use in a drill bit, has a substrate comprising a grip portion and an extension and at least a cutting layer affixed to said substrate. The cutting layer has a cutting surface and an interface surface, and the cutting surface includes a region of residual compressive stress, which functions as a preload or prestress so as to offset the effect of localized loading due to contact with the formation during drilling.

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