Small diameter impact boring tool impact head

Details Small diameter impact boring tool impact head Small diameter impact boring tool impact head

1998-07-06

1999-08-10

Tsay, Frank

Boring or penetrating the earth

Boring without earth removal

175296, 173 91, 173206, E21B 414

Patent

active

059343869

ABSTRACT:
An elongated tube has a high pressure feed line on one end and an impact head on the other end. A tube intermediate the ends of the tool houses two cylinders having one piston is in each cylinder. The two pistons are tied together by a piston rod extending through a bulkhead dividing the two coaxially aligned cylinders.

REFERENCES:
patent: 4114950 (1978-09-01), Cooper
patent: 4618007 (1986-10-01), Kayes
patent: 4840237 (1989-06-01), Roemer
patent: 4886128 (1989-12-01), Roemer
patent: 5056608 (1991-10-01), Hemmings
patent: 5210918 (1993-05-01), Wozniak et al.
patent: 5226487 (1993-07-01), Spektor
patent: 5413185 (1995-05-01), Kayes
patent: 5505270 (1996-04-01), Wentworth

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