Rotary drill bit

Details Rotary drill bit Rotary drill bit

E - Fixed Constructions

21

B

255/74

E21B 10/22 (2006.01) E21B 10/08 (2006.01) E21B 10/16 (2006.01) E21B 10/20 (2006.01) E21B 10/52 (2006.01)

Patent

CA 1235113

Abstract A rotary drill bit comprising a cutter bit (10) having a plurality of mutually displaced rows (12-17) of cut- ting means (11) extending in the circumferential direction of the cutter bit (10). The included cone angle (?) of the cutter bit (10) is larger than 90° and adapted to the mutual positioning of the cutting means (11) on the cutter bit (10) in such a way that it is ensured that repetition of the pattern of the cutting means is avoided.

482420

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