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The Hydraulic Jar is used in the event that equipment becomes stuck in the well bore and provides an upward shock to assist in freeing the tools. Over-pull at surface is applied to the string, which causes oil to move through a flow restrictor.
This hydraulic delay allows energy to be stored in the string. At the end of the stroke, the restriction is removed causing the mandrel to move rapidly upward. This results in a sudden impact to help free the stuck tools. If the tools are not free, a downward stroke resets the Hydraulic Jar for the next attempt.
Competitor Tool / Tool Name | Model |
---|---|
Schlumberger Hydraulic Jar | JAR-F |
Schlumberger Slim | JAR-G |
Halliburton | Pressure-Balanced Jar |
Halliburton | Big John Hydraulic Jar |
Expro Hydraulic Jar | JAR |
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