Patent ID: 6702043
Filing Date: 2004-03-09
Classification: E21B

Abstract:
A drill for double-head and overlap drilling comprising a drill driving gear, a mount for guiding said gear while the gear is being shifted longitudinally a drill string comprising single tubes, a rod magazine shaped to form an arced track, a gripping device coupled to the rod magazine for transporting the tubes out of the rod magazine into a drilling axis and back, the gripping device being rotatable around an axis and comprising a telescoping support arm, the gripping device being movable axially relative to the mount, the rod magazine comprising quiver-shaped, fixed tube storage receptacles around the axis of the gripping device, the receptacles being distributed at spaced intervals on a graduated circle, said storage receptacles being suitable for accommodating single tubes and double tubes, said double tubes comprising exterior and interior tubes, and said storage receptacles fixing said tubes in position.