Method of drilling boreholes in areas with restricted access

Details Method of drilling boreholes in areas with restricted access Method of drilling boreholes in areas with restricted access

E - Fixed Constructions

21

B

E21B 7/00 (2006.01) E21B 1/00 (2006.01) E21B 7/02 (2006.01) E21B 21/10 (2006.01) E21B 21/16 (2006.01)

Patent

CA 2272773

A method of drilling boreholes in areas with restricted access. There is provided an air source, an air drill, a plurality of lengths of hose, and a plurality of manual shut off valves. The lengths of hose are extended from the air source to a location where a borehole is to be drilled in the area of restricted access. A manual shut off valve is positioned on the length of hose at the location where the borehole is to be drilled and the air drill is attached. The borehole is drilled with the air drill, using air to circulate cuttings to surface. The manual shut off valve is closed to maintain air pressure from the air source in the hose while the air drill is detached and further lengths of hose are attached to reach a next location where a next borehole is to be drilled.

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