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  1. MTRZEM

    Stuck Drill String

    Is it a directional well ? Optimum strenght to activate jar I worked with was 40-45t (for the first, 'mechanical') and 60-80t for the second, hydraulic stroke. If jarring gives no effect, and your mud is not oil-based, try the oil bath. Pump it in the interval of annulus and leave the drill...

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