Rock bit for a down-the-hole drill

Details Rock bit for a down-the-hole drill Rock bit for a down-the-hole drill

E - Fixed Constructions

21

B

E21B 10/00 (2006.01) E21B 10/38 (2006.01) E21B 10/56 (2006.01)

Patent

CA 2041254

A rock bit for a down-the-hole drill includes an auxiliary apparatus for flushing the working face of the drill bit to facilitate the removal of cuttings and debris through peripheral troughs in the drill and significantly reducing the abrasive effect of the cuttings and debris on the bit ?. The exhaust fluid is supplied to the working face of the drill bit through several delivery channels spaced equidistantly about the periphery of the drill head where a first set of delivery channels are disposed at acute angles to the central axis of the drill bit and a second set of delivery channels are interposed directly between the central bore of the drill bit and the working face.

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