Rock drilling apparatus and method

Details Rock drilling apparatus and method Rock drilling apparatus and method

E - Fixed Constructions

21

B

255/31

E21B 10/00 (2006.01) E21B 7/28 (2006.01) E21B 21/00 (2006.01) E21B 21/015 (2006.01) E21B 27/00 (2006.01)

Patent

CA 1056366

ABSTRACT OF THE DISCLOSURE A method of drilling a large hole through rock and removing the drilling waste by drilling a pilot hole from one rock face to another, reverse drilling with a large drill bit and removing the waste during the reverse drilling by pressurizing the pilot hole to eject the waste through a muck extractor dragged behind the large drill bit; and an apparatus to carry out this method consisting of a sealing member for the one rock face, and a muck extractor for securement to the large drill bit.

260105

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