Apparatus and method for coring subterranean holes

Details Apparatus and method for coring subterranean holes Apparatus and method for coring subterranean holes

E - Fixed Constructions

21

B

61/5.1

E21B 7/26 (2006.01) E21B 7/28 (2006.01) E21B 10/02 (2006.01)

Patent

CA 1166857

ABSTRACT OF THE DISCLOSURE There is described a method and apparatus for non- rotatively forming holes in the ground between first and second spaced locations, the apparatus comprising a pilot hole forming head for forming a pilot hole between the first and second spaced locations, a broaching head having a first trailing end and a second leading end for cutting a core of earth, core extruders cooperating with the broaching head to extrude the core of earth, and winches respectively connected to the leading end of the broaching head for pulling the broaching head along the pilot hole towards the second location to cut the core of earth and to the trailing end of the broaching head to pull the broaching head towards the first location to extrude the core of earth.

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