Jar mechanism accelerator

Details Jar mechanism accelerator Jar mechanism accelerator

1987-09-21

1989-07-11

Dang, Hoang C.

Wells

With jar means for releasing stuck part

175297, 175299, 175300, 175321, E21B 31107

Patent

active

048462730

ABSTRACT:
An energy accumulator for use with a well pipe string to enhance the jarring impact delivered to an object stuck in a well bore by an up and/or down jar mechanism includes inner and outer telescopically connected members relatively movable longitudinally to accumulate energy in a mechanical spring arrangement, gas or compressible liquid in the accumulator. Cooperating surfaces on the inner and outer members of the energy accumulator assure that the jarring impact of the jar mechanism members is delivered to the stuck independently of the tensile or compressive load applied to the object jar mechanism and independently of the load rate of accumulating energy in the energy accumulator.

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patent: 4434863 (1984-03-01), Garrett
patent: 4545444 (1985-10-01), Webb et al.

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