NOVELTY - The method involves forcing a flow able substance through a drill rod (42) and a drill rod end portion (37) exiting through the outlets of drill rod end portion into a blind hole. The drill rod and the drill rod end portion are moved in a direction reverse to the first direction, while un-attaching the drill rod from U-shaped heat exchange tube when drill rod is in the blind hole. The drill rod is withdrawn from the blind hole, while allowing U-shaped heat exchange tube to remain in the blind hole which is held by flow able substance.    USE - Method for installing U-shaped heat exchange tube of geothermal closed loop system in blind hole in ground using boring machine used in buildings or house.    ADVANTAGE - The rotation of the heat exchange tube can be minimized with respect to the attached drill rod as the drill rod is rotated into the ground. An improved method is provided for installing a tube of a geothermal closed loop system into the ground. The bored hole is large relative to cone shaped end, so interference of end with tube can be prevented as end is pulled outward from the hole. A bearing is provided with an inner race which is fixedly secured to the drill end main portion thus relative motion between race and the drill rod and drill end main portion is prevented. The leading edge of rudder is reduced and sized. The collar is prevented from cocking by mounting headed fasteners on either side of collar.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a device for creating a geothermal closed loop using a u-shaped tube positioned in a blind hole in the ground; and    (2) a combination dispenser for slurry and a heat exchange tube holder to attach to a drill rod with a drill bit for creating a blind hole in the ground.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view with u-shaped heat exchange tube attached to the drill end portion.    Drill rod end portion (37)    Drill rod (42)    U-shaped coolant tube (45)    Coupler (54)    Arm (56)