Convex-shaped diamond cutting elements

Details Convex-shaped diamond cutting elements Convex-shaped diamond cutting elements

E - Fixed Constructions

21

B

255/69

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

Patent

CA 1334406

A diamond insert (30) for a rotary drag bit (10) comprises an insert stud body (32) with a first base end and a second cutter end. The cutter end of the insert is formed in a convex or spherical shape (42) of polycrystalline diamond material (40). The convex layer of diamond (42) is oriented relative to an axis of the stud body with a negative rake angle from 0 to about 45, inclusive. A plurality of such inserts (30) mounted in the cutting face (17) of a drag bit (10) cut earth formation with reduced friction and good cooling of the polycrystalline diamond.

603072

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