E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/71, 61/5.1
E21B 7/20 (2006.01) E21B 7/04 (2006.01) E21B 7/26 (2006.01) E21B 7/28 (2006.01) E21B 10/02 (2006.01)
Patent
CA 1106833
ABSTRACT OF THE DISCLOSURE There is described a new and improved method and apparatus for boring subterranian holes between horizontally spaced locations, comprising a broaching head having a first trailing and a second leading end for cutting a bore hole through the ground, a rod string releasably connectible to the first end thereof for pushing the broaching head through the ground; a guiding head cooperating with the broaching head for guiding the movement of the broaching head between the horizontally spaced locations, and extruders to extrude the incised core of the bore. The broaching head is pushed between the locations to cut a core, which passes through the head, by forming first and second coaxial incisions, whereby subsequent removal of the core is facilitated.
359750
Adam Arthur
G. Ronald Bell & Associates
LandOfFree
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