Method and rock drilling rig for hole drilling

E - Fixed Constructions – 21 – B

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E21B 6/00 (2006.01) E21B 7/24 (2006.01)

Patent

CA 2623625

The invention relates to a method and a rock-drilling rig for drilling a hole in a rock. In the method the hole is drilled with a so-called top-hammer rock- drilling rig including a drill rod and a cone roller bit at the end of the drill rod. During drilling with the percussion device, stress pulses of low amplitude are produced at a high frequency of at least 200 Hz. In the rock drilling rig, the cone roller bit (3) at the end of the drill rod and the percussion device are configured to feed stress pulses of low amplitude, at the frequency of at least 200 Hz, via the drill rod and the cone roller bit to the rock.

La présente invention concerne un procédé et un appareil de forage de roche pour forer un trou dans une roche. Dans le procédé, le trou est foré avec un appareil de forage de roche dit à marteau supérieur qui comprend une tige de forage et un trépan à molette conique au niveau de l~extrémité de la tige de forage. Au cours du forage avec le dispositif à percussion, des impulsions de contrainte de faible amplitude sont produites à haute fréquence d~au moins 200 Hz. Dans l~appareil de forage de roche, le trépan à molette conique (3) au niveau de l~extrémité de la tige de forage et le dispositif à percussion sont configurés pour distribuer des impulsions de contrainte de faible amplitude, à la fréquence d~au moins 200 Hz, par l~intermédiaire de la tige de forage et du trépan à molette conique à la roche.

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