Drill bit and improved cutting element

Details Drill bit and improved cutting element Drill bit and improved cutting element

E - Fixed Constructions

21

B

255/69

E21B 10/56 (2006.01)

Patent

CA 1214159

Abstract A drill bit for connection to a drill string has a bit body (2) with a cutting face (7), which supports a plurality of cutting elements (18). The cutting elements (18) comprise a cylindrical supporting stud (19) of sintered carbide which has a diamond cutting element (26) mounted thereon. The dia- mond cutting elements (26) have a novel cutting shape faci- litating drilling through hard formations with a minimum of applied weight on the bit. The cutting elements (26) are in the shape of a relatively large disc shaped cutter commonly used for medium and soft formations but have the sides shaped into a cutting edge (126) of substantially smaller radius. The cutting element (26) has the strength and resistance to break- down of the larger disc but the cutting capacity in hard forma- tions of a smaller diameter cutter. The cutting elements (26) are also disclosed as novel components of the drill.

447695

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