Hydromechanical drilling jar

Details Hydromechanical drilling jar Hydromechanical drilling jar

1975-06-23

1976-10-26

Leppink, James A.

Boring or penetrating the earth

Below-ground impact members

Fluid-operated

E21B 110

Patent

active

039878589

ABSTRACT:
An improved hydromechanical drilling jar for applying upward and downward jarring blows to an object stuck in a well wherein the jar comprises a mechanically operated jar section which is connected with a hydraulically operated jar section by flexible tubular connector means for providing flexibility therebetween for relieving bending moments on the jar sections during use. The jar sections are separable for ease in storage and transportation and may be relatively positioned in a drill string as desired.

REFERENCES:
patent: 2659576 (1953-11-01), Linney
patent: 3429389 (1969-02-01), Barrington
patent: 3562807 (1971-02-01), Slator et al.
patent: 3853187 (1974-12-01), Sutliff et al.
patent: R23354 (1951-04-01), Storm
Bowen Hydromechanical Drilling Jars; 1974-1975 General Catalog, p. 666-B.

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