Cutting elements for rotary drill bits

Details Cutting elements for rotary drill bits Cutting elements for rotary drill bits

E - Fixed Constructions

21

B

76/21, 255/69

E21B 10/00 (2006.01) E21B 10/56 (2006.01)

Patent

CA 1252458

S P E C I F I C A T I O N 'Improvements in or relating to cutting elements for rotary drill bits' ABSTRACT OF THE DISCLOSURE A cutting element, for a rotary drill bit, comprises a tablet having a front face, a rear face and a peripheral edge, at least the front face of the tablet being provided by a layer of superhard material, such as polycrystalline diamond. The peripheral edge of the tablet is formed with one or more re-entrant portions so as to define projecting cutting portions to the sides of the re-entrant portions. The element may be cut from a blank which is initially circular.

498510

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