Patent ID: 7377335

Claim:
A drilling apparatus capable of drilling in at least two drilling locations on a drilling surface, said drilling apparatus comprising: a. a rig structure including a surface-engaging tool, said rig structure having a rig base with a substantially planar lower surface; b. a drilling pad having a substantially planar rig support surface with at least one drilling location aperture passing therethrough, wherein said pad can be placed on the drilling surface over desired adjacent drilling locations such that each of said drilling locations coincides with a drilling location aperture, and wherein the lower surface of the rig base rests on said rig support surface; wherein said rig structure can be positioned on said pad in a first position in alignment with a first drilling location aperture such that said surface-engaging tool can pass through said first drilling location aperture and access a first drilling location coinciding therewith; and wherein said rig base can freely slide fore and aft and left and right and diagonally over the rig support surface of said pad, such that the rig structure can be moved from said first position to a second position in alignment with a second drilling location aperture such that said surface-engaging tool can pass through said second drilling location aperture and access a second drilling location coinciding therewith by sliding said rig base horizontally fore and aft and left and right and diagonally as required across said rig support surface from said first position to said second position.