MICROTUNNELING APPARATUS

Abstract: this invention relates to a reamer assembly () for enlarging a substantially horizontal pilot hole () in the ground to produce a bore hole (), including a cutter () which is rotatable about an axis x-x. a gear box () is positioned on a first side of the cutter () for interacting with a drive shaft () which is rotated about the axis x-x by a drive apparatus () outside the pilot bore hole () and a body () positioned on a second side of the cutter () for transferring thrust from a thrust apparatus () outside of the enlarged bore hole () to the cutter ().

Inventor(s): Albert Fourie, Allen Henley, Stuart Ronald Harrison, Gregory Alan Geldard

CPC Classification: E21B7/28 (Enlarging drilled holes, e.g. by counterboring)

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