Patent ID: 7644785

Claim:
A rotary driven well drilling apparatus for installation of geothermal loops comprising: an erectable mast; a head drive unit capable of linear movement along the mast for rotatably driving drill pipes into a surface; a pumping unit to deliver a fluid through a drill pipe secured to the head drive, the fluid being forced out a bottom end of the drill pipe and up to the surface along the outside of the drill pipe during a borehole drilling operation; a deck unit pivotally mounted on a turret attached to a set of tracks, the deck unit supporting the mast; and a mud pan attached to the deck unit to receive cuttings from the drilling operation; and wherein the apparatus is configured to: while the apparatus is in a first location, perform a first borehole drilling operation to form a first borehole at a second location; and perform a second borehole drilling operation to form a second borehole at a third location while the apparatus remains in the first location.