Drill cutter bit

Details Drill cutter bit Drill cutter bit

E - Fixed Constructions

21

B

255/84

E21B 10/00 (2006.01)

Patent

CA 1164857

8-486CA DRILL CUTTER BIT ABSTRACT OF THE DISCLOSURE A drill cutter bit having good performance char- acteristics for drilling in various types of strata including not only hard and medium rock formations but also soft rock formations such as in mine roof drilling. The drill bit includes an elongated hollow shank portion and an integral head portion having multiple working surfaces provided with a transversely extending slot adapted to receive a plate- like, insert cutter element therein. The work surfaces in- clude pairs of oppositely disposed heel and compression sur- faces that taper downwardly and outwardly via a predetermined compression angle to provide an abrading and shearing action for progressively reducing the drill cuttings to a relatively dust-like consistency. A pair of oppositely disposed dust collecting openings are constructed and arranged to cooperate with the compression surfaces to define dust collection intake pasageways that act to give a metering action on the dust- like material for removal through the shank portion during drilling.

386365

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