Downhole jarring tool adjuster

Details Downhole jarring tool adjuster Downhole jarring tool adjuster

2005-05-24

2005-05-24

Walker, Zakiya (Department: 3672)

Wells

Processes

Freeing stuck object, grappling or fishing in well

C166S178000, C175S299000, C175S306000

Reexamination Certificate

active

06896060

ABSTRACT:
A downhole jarring apparatus including a shaft and a first mandrel configured to releasably engage, a collar operatively attached to the shaft such that an axial position of the collar relative to the shaft is adjustable by access through an opening in an outer surface of a second mandrel, and an energy store configured to exert a force against the shaft, wherein the force is adjustable in response to the axial position of the collar relative to the shaft.

REFERENCES:
patent: 4844157 (1989-07-01), Taylor
patent: 5669458 (1997-09-01), Anders

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