Hydraulic jar

Details Hydraulic jar Hydraulic jar

1991-07-02

1992-12-29

Neuder, William P.

Boring or penetrating the earth

Below-ground impact members

Fluid-operated

166178, E21B 31113

Patent

active

051743930

ABSTRACT:
There are disclosed alternate embodiments of a double acting hydraulic jar having a single detent chamber having a restriction on the inner diameter of its outer tubular member through which detent means carried about the outer diameter of the inner tubular member may be moved in order to impart either an up or down jar.

REFERENCES:
patent: Re23354 (1951-04-01), Storm
patent: 2659576 (1953-11-01), Linney
patent: 4109736 (1978-08-01), Webb et al.
patent: 4361195 (1982-11-01), Evans
patent: 4456081 (1984-06-01), Newman
patent: 5033557 (1991-07-01), Askew

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