Vertical percussion ground boring tool apparatus and method

Details Vertical percussion ground boring tool apparatus and method Vertical percussion ground boring tool apparatus and method

1995-02-14

1996-07-30

Tsay, Frank

Boring or penetrating the earth

Boring without earth removal

175171, 175414, 173 34, E21B 726

Patent

active

055402941

ABSTRACT:
A self-propelled percussion boring tool apparatus (10) and method for incrementally boring a generally vertical hole (12) to substantial depths. The boring tool (10) includes a torpedo-shaped elongated cylindrical casing (13) having a trailing pipe (22) coupled to and extending away from the back end (14) of the casing (13). In another instance, the boring tool (10) includes a trailing pipe (34) extending away from the back end (14) of the casing (13), and formed to be retained in the hole (12) after removal of the boring tool (10). In either arrangement, the present invention facilitates recovery of the boring tool (10) from bored vertical holes (12) of substantial depth.

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