Jarring and bumping tool for use in oilfield drilling strings

Boring or penetrating the earth – Below-ground impact members – Fluid-operated

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Details

166178, E21B 110

Patent

active

RE0287687

ABSTRACT:
A single tool, having a bumper free-stroke chamber and jar free-stroke chamber spaced apart by the usual reduced-diameter barrel section, is provided. The tool carries impact faces and is adapted to selectively jar upwardly or bump downwardly.

REFERENCES:
patent: 2721056 (1955-10-01), Storm
patent: 3405773 (1968-10-01), Sutliff et al.
patent: 3716109 (1973-02-01), Griffith
patent: 3729058 (1973-04-01), Roberts

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