Geothermal heat loop installation

A rotary driven well drilling apparatus for installation of geothermal loops comprising:

• a deck having an erectable mast attached thereto;
• a head drive unit to rotatably drive a number of drill pipes into a ground surface in order to form a geothermal borehole capable of housing a geothermal loop, the number of drill pipes forming a drill pipe string, and the head drive unit being attached to the erectable mast and capable of linear movement thereon;
• a pumping unit to deliver a fluid through the drill pipes during a drilling operation, the fluid being delivered through the inside of the drill pipes at a top end of the string and flowing upward toward the ground surface on the outside of the drill string after passing through a drill bit of the drill string;
• and
• a mud pan attached to the deck to receive cuttings from a drilling operation;
• wherein the deck is mounted on a turret attached to a set of tracks to drill a number of geothermal boreholes.

A rotary driven well drilling apparatus for installation of geothermal loops comprising:

• a deck having an erectable mast attached thereto;
• a head drive unit movably attached to the mast and capable of linear movement thereon to rotatably drive a number of drill pipes into a ground surface by using a drive shaft having threads on a lower end for removably engaging threads on the number of drill pipes in a drill string in order to form geothermal boreholes;
• a pumping unit to deliver a drilling fluid to the head drive unit such that the drilling fluid passes through the lower end of the drive shaft and down through a drill bit end of the drill string during a drilling operation;
• and
• a mud pan attached at a rear portion of the deck to receive cuttings from a drilling operation;
• wherein the deck is rotatably mounted on a turret attached to a set of caterpillar tracks to perform a plurality of drilling operations at a first location of the turret relative to the ground surface in order to drill a plurality of geothermal boreholes a radial distance from the first location while the turret remains at the first location.