Rotary drill bit

Details Rotary drill bit Rotary drill bit

E - Fixed Constructions

21

B

255/63

E21B 10/00 (2006.01) E21B 10/26 (2006.01) E21B 10/42 (2006.01) E21B 10/60 (2006.01)

Patent

CA 1150720

A B S T R A C T Described is a rotary drill bit comprising a hollow body having a closed lower end and means on the upper end for securing the body to the lower end of a drill string. The body is provided with a plurality of flow passages and a deflecting means is provided to deflect upwardly and away from the flow passages cuttings and the like to avoid plugging the passages during drilling while permitting unimpeded flow from the passages of all the fluid passing through the hollow body.

408938

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