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Double acting accelerator jar

Wells – With jar means for releasing stuck part
Patent

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Downhole oil and gas well jacking tool for use with coil tubing

Wells – With jar means for releasing stuck part
Patent

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Downhole tool with pressure balancing

Wells – With jar means for releasing stuck part
Reexamination Certificate

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Drill string jarring and bumping tool

Wells – With jar means for releasing stuck part
Patent

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E-line downhole jarring tool

Wells – With jar means for releasing stuck part
Reexamination Certificate

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Field adjustable impact jar

Wells – With jar means for releasing stuck part
Reexamination Certificate

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Field adjustable impact jar

Wells – With jar means for releasing stuck part
Reexamination Certificate

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Hydraulic jar

Wells – With jar means for releasing stuck part
Patent

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Hydraulic jar

Wells – With jar means for releasing stuck part
Patent

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Hydraulic jar lock

Wells – With jar means for releasing stuck part
Reexamination Certificate

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Hydraulic jar mechanism

Wells – With jar means for releasing stuck part
Patent

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Hydraulic up-down well jar and method of operating same

Wells – With jar means for releasing stuck part
Patent

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Hydraulically driven fishing jars

Wells – With jar means for releasing stuck part
Reexamination Certificate

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Impact enhancing tool

Wells – With jar means for releasing stuck part
Reexamination Certificate

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Jar

Wells – With jar means for releasing stuck part
Patent

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Jar accelerator

Wells – With jar means for releasing stuck part
Patent

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Jar for use in a downhole toolstring

Wells – With jar means for releasing stuck part
Reexamination Certificate

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Jar mechanism

Wells – With jar means for releasing stuck part
Patent

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Jar mechanism accelerator

Wells – With jar means for releasing stuck part
Patent

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Jarring tool

Wells – With jar means for releasing stuck part
Patent

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