Patent ID: 8672058
Filing Date: 2014-03-18
Classification: E21B,F24T,Y02E

Abstract:
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.