Rock drill

Details Rock drill Rock drill

E - Fixed Constructions

21

B

255/84

E21B 10/00 (2006.01) E21B 7/24 (2006.01) E21B 10/04 (2006.01) E21B 10/38 (2006.01) E21B 10/40 (2006.01)

Patent

CA 1101408

DOCKET 8357 IR RD RR ROCK DRILL ABSTRACT OF THE DISCLOSURE A rock drill system uses a high frequency, low energy per blow percussive drill device to drive a rock drill bit having a cylindrical sleeve and a breaking bar within the sleeve adjacent the cutting edge of the bit. The bit is operated without rotation and the low energy, high frequency enables operation without destroying the bit. A peening effect occurs around the outer circumference of the drilling end of the bit to create a slightly larger diameter than the diameter of the bit thereby enabling easy withdrawal from the hole.

311735

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