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Jars & Jarring WFD Adjustable Upstroke Jar

High Jarring Impacts Generated by a Trip Mechanism and Belleville Washers

The Weatherford Petroline Adjustable Upstroke Jar (PAJ) functions in a similar way to other springs jars using belleville washers to provide the trip resistance, the impact achieved on firing the jars is higher than with hydraulic or mechanical jars……

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