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U.S. Department of Energy
Office of Scientific and Technical Information

Method and apparatus for drilling generally horizontal bores

Patent ·
OSTI ID:6094012
Means are provided to drill generally horizontal bores through heterogeneous fill and hard strata. A carriage providing power means to rotate a spindle is mounted on a generally horizontal track and is adapted to move longitudinally along the track. Swivel means about the spindle are provided with means to introduce a combined gas and liquid stream, suitably air and water, into a drill pipe connected to the spindle and through an impact drill mounted at the end of the drill pipe to power the drill and to flush cuttings from the hole.
Assignee:
EDB-85-043513
Patent Number(s):
US 4474252
OSTI ID:
6094012
Country of Publication:
United States
Language:
English