E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
255/90
E21C 7/00 (1990.01)
Patent
CA 2024625
There is disclosed a system for drilling holes underground within an underground environment. The system includes drilling means having a drilling face for drilling a shaft underground. The system further includes cyclonic filter means operatively associated with the drilling means for drawing, by suction, debris produced during a drilling procedure. A shroud is mounted directly adjacent the drilling face such that a distance between the shroud and the drilling face is non-variable. A debris removal device is connected to the shroud for communication with the cyclonic filter means.
England J. Richard
Mcfadden Fincham
LandOfFree
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