Multi-purpose mobile drill rig

A drill rig for drilling a hole in the ground comprising:

• (a) a mast, having a longitudinal slide means at one mast face thereof for enabling longitudinal movement therealong, said mast being adapted to be set upright at one side of a drill hole to be drilled with the rig, with said mast face and said slide means thereon facing, and being at a selected spacing from and being parallel to the axis of the drill hole;
• (b) a slide frame mounted upon said longitudinal slide means and lifter-pulldown means in the mast for causing movement of said slide frame along the longitudinal slide means;
• (c) a lateral shifting means on said slide frame shiftable outwardly from said mast face and the slide frame in the direction of the drill hole;
• (d) a drill carrier attached to said lateral shifting means to be shifted between a first position adjacent an outward side of said slide frame and a second position spaced outwardly away from said mast and slide frame thereon;
• (e) first and second separate drill mechanism means and drill pipe means being mountable upon said drill carrier for drilling the drill hole, with the drill pipe means being aligned with the drill hole axis after the drill carrier is selectively shifted to one of the first and second aforesaid positions;
• and
• (f) one of said separate drill mechanism means and drill pipe means being aligned with the drill hole axis when said drill carrier is at one of said first and second positions, and the other of said separate drill mechanism means and drill pipe means being aligned with the drill hole axis when said drill carrier is at the other of said first and second positions whereby to permit quick-change selective drilling with said first and second separate drill mechanism means and drill pipe means.