PORTABLE DRILLING MACHINE

摘要

The present invention relates to drilling equipment. The portable drilling machine comprises a derrick having longitudinal racks guiding a vertical traverse mechanism carrying a traverse having a means designed for rotation of a drill pipe during the drilling operation, said pipe being positioned longitudinally in the derrick in alignment with the drilling axis; a pulldown unit connected through a closed flexible transmission with the vertical traverse mechanism and the traverse to feed, during the working run thereof, the drill pipe to the bottom of the hole and, during the reverse run thereof, to raise the drill pipe; and a clamp designed for gripping the drill pipe on completion of the working run of the vertical traverse mechanism and the traverse and being mounted at the base of the derrick. The means for rotation of the drill pipe is designed as a powerdriven rotating chuck mounted in the traverse. Said chuck grips the drill pipe during the drilling operation, and can, during an idle run when it is unclenched together with the vertical traverse mechanism, regrip the pipe while the drill pipe is held by a clamp. Such drilling machines can make vertical and angle holes to the full depth by using only one long drill pipe to a most efficient manner as to rotation rate thereof and load on the bit, which makes such a drilling machine a high-capacity design.