Rotary drill bit

Details Rotary drill bit Rotary drill bit

E - Fixed Constructions

21

B

255/68

E21B 10/60 (2006.01)

Patent

CA 1317282

A B S T R A C T ROTARY DRILL BIT A drag type bit is equipped with nozzles for creating high- velocity mud jets discharging into waterways in front of the wings of the bit, which nozzles are oriented such that each jet successively strikes the borehole bottom and front face of wing at a small angle,

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