Rock drilling method

Details Rock drilling method Rock drilling method

E - Fixed Constructions

21

B

255/49

E21B 4/00 (2006.01) E21B 3/025 (2006.01) E21B 6/00 (2006.01)

Patent

CA 1073894

Rock Drilling Method Abstract of the Disclosure A rock drilling method according to which the drill is subjected to successive axial strikes and is rotated around its longitudinal axis. The direction of rotation is repeatedly reversed after the drill has rotated at least one revolution in one direction.

284085

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