Jar mechanism accelerator

Details Jar mechanism accelerator Jar mechanism accelerator

E - Fixed Constructions

21

B

255/29

E21B 31/107 (2006.01)

Patent

CA 1295320

JAR MECHANISM ACCELERATOR Abstract of the Disclosure An energy accumulator for use with a well pipe string having a portion stuck in a well bore to enhance the jarring impact delivered to the well pipe string stuck portion by a 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 assure that the jarring impact of the jar mechanism members is delivered to the well pipe string stuck portion independently of the tensile or compressive load applied to the jar mechanism and independently of the load rate of accumulating energy in the energy accumulator.

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