Rotary drill bit

Details Rotary drill bit Rotary drill bit

E - Fixed Constructions

21

B

255/11

E21B 10/18 (2006.01) E21B 10/60 (2006.01) E21B 21/00 (2006.01)

Patent

CA 1234094

A B S T R A C T ROTARY DRILL BIT A rotary drill bit comprises a tubular strainer element in which narrow axial slots are arranged that prevent solid debris from passing to the nozzles of the bit; the self-cleaning ability of the strainer element is enhanced by increasing the bore of the strainer element in the region below the slots.

486854

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