PAJ Jar

Weatherford (Petroline)Adjustable Upstroke Jar (PAJ)

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 and the mechanism trips at a pre-determined force applied to the jar rod from the winch on surface.