Small diameter impact boring tool

Tool driving or impacting – Impacting devices – Selective axial direction of impact

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Details

173206, 175 19, 175296, E21B 414

Patent

active

059186879

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:
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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
patent: 5511626 (1996-04-01), Steen
patent: 5787995 (1998-08-01), Ekwall et al.

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