Method for repairing aberrations along a drill bore wall
The invention provides a system for adapting an HVAC system in an existing building for utilizing geothermal energy, the system comprising an incoming flux of geothermal energy; a plurality of heat exchange surfaces adapted to receive the incoming flux of geothermal energy; and an interface between the HVAC system and the heat exchange surfaces, said interface adapted to transfer the geothermal energy to the system. Also provided is a method for repairing aberrations in drill borings, the method comprising using a rotary mud drill system to produce a drill hole up to the location of the aberrations; removing the rotary mud drill from the drill hole; inserting an auger into the drill hole to a point directly above the location of the aberrations; actuating the auger; introducing loose substrate into the drill hole; allowing the substrate to contact the auger; and lifting and lowering the auger along longitudinally extending regions of the drill hole defining the aberrations for a time and in substrate amounts sufficient to fill the aberrations. The invention also provides a system which facilitates rotating drill bits at an rpm which are multiples faster than their associated drill strings.
1. A method for repairing aberrations along a drill bore wall, the method comprising:
a. using a rotary mud drill system to produce a drill hole, wherein the system employs a first return mud pressure value;
b. stopping the rotary mud drill system when return mud pressure decreases to a second return mud pressure value at a point in the drill hole;
c. positioning a reverse auger into the drill hole at said point;
d. rotating the auger in a direction opposite the flights of the auger;
e. introducing loose substrate into the annulus of the drill hole so as to cause said loose substrate to contact the auger;
f. forcing the loose substrate into said aberrations by means of said auger rotation;
g. lifting and lowering the auger along longitudinally extending regions of the drill hole defining the point for a time and in substrate amounts sufficient to minimize the aberrations; and
h. restarting the rotary mud drill system to extend the length of the drill bore to a depth deeper than said point.
2. The method as recited in claim 1 wherein the auger is a right hand screw configuration, and the auger is actuated by turning it on its longitudinal axis in a left hand direction.
3. The method as recited in claim 1 wherein the auger is a left hand screw configuration, and the auger is actuated by turning it on its longitudinal axis in a right hand direction.
4. The method as recited in claim 1 wherein the loose substrate is ⅜ inch sized bentonite.
5. The method as recited in claim 1 wherein the application of the substrate follows the introduction of bridging material.
6. The method as recited in claim 1 wherein the step of using a rotary mud drill system to produce a hole further comprises the step of:
a. locating aberrations within a formation by:
i. determining average mud return pressures during drilling;
ii. noting when the pressures initially drop; and
iii. determining the depth of a mud rotary drill bit at the point of pressure drop.