Patent ID: 8529156

Claim:
A device used during the creation of a geothermal closed loop in a blind hole in the ground using an inlet tube portion and an outlet tube portion positioned in and extending out of the blind hole comprising: a drill rod having a drill end portion with an axis of rotation; a main body having an inlet and an outlet associated respectively with the inlet tube portion and the outlet tube portion with said main body forming an internal cavity opening at said inlet and said outlet; a drill bit mounted to said drill rod; and, a mount on said drill end portion for mounting said main body and limiting rotation thereof around said axis as said drill rod and said drill end portion rotate in said blind hole but releasing the main body as the drill rod and drill end portion are pulled from the blind hole leaving the main body along with the inlet tube portion and the outlet tube portion within the ground, said mount having a mounting arm, said main body includes a slot opening in a first direction along said axis of rotation away from said drill bit into which said arm projects limiting movement of the inlet tube portion and the outlet tube portion along said axis of rotation away from said drill bit but allowing movement along said axis in a direction toward said drill bit.