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Ultimate Double Acting Hydraulic Drilling Jar
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Ultimate Double Acting Hydraulic Drilling Jar

Brand: Wenzel Downhole Tools
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Using proprietary new technology, Wenzel Downhole has been able to dramatically increase the allowable overpull force. 

The Ultimate Double Acting Hydraulic Drilling Jar (UHJDA) is a bi-directional drilling jar incorporating hydraulic delay without a latch mechanism.  

This jar will allow the operator to apply variable impact in both the up and down directions.  

The UHJDA is intended for use in highly deviated or high friction wells, where conditions may prevent applying sufficient force to release a mechanical latch.
Features
  • The UHJDA is hydraulically controlled and jars in both directions, with impact force controlled by the operator.
  • Impact force is controlled by a metering device that ensures consistent delay times over the full range of operating temperatures.
  • The UHJDA operates via a simple up and down motion and is unaffected by right- or left-hand torque.
  • Standard seals in the tool are effective to 250°F (120°C). The jar can be dressed with seals effective to 400°F (200°C) for hot hole environments, and 450°F (230°C) for extreme temperature environments. External sealing surfaces are tungsten carbide-coated to enhance wear and corrosion resistance.

Specifications

Brand

Nominal OD (inches)

  • 4.75
  • 6.50
  • 6.75
  • 7.00
  • 8.00
  • 9.50

Length (ft)

  • 22.0
  • 23.1
  • 22.7
  • 23.2
  • 24.1

Thru Bore (inches)

  • 2.25
  • 2.75
  • 2.81
  • 3.00

Tensile Yield (lbs)

  • 234,900 to 1,658,500

Torsional Limit (ft-lbs)

  • 21,500 to 103,200

Maximum Pull During Delay (lbs)

  • 132,000 to 550,000

Free Stroke Up/Down (inches)

  • 8.0

Total Stroke (inches)

  • 25.0

Documentation

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