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The Wenzel Downhole Tools Hydraulic Jar (HJ) is a single acting jar designed primarily for fishing applications, jarring in the upward direction.   

Hydraulically operated, with impact force controlled by the operator, the HJ is ideally suited for fishing, coring, milling or other downhole applications.
Features
  • The HJ is hydraulically controlled and jars in the up direction, 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.
  • A long splined mandrel ensures the jar is not affected by torsional forces.  These splines are sealed and lubricated to minimize friction and provide long wear life.
  • While this jar is designed to be rugged enough for drilling applications, it is intended for fishing, coring, and milling applications.
  • A free stroke of 4″ to 6″ (depending on tool size) provides an impact force to the stuck point several times higher than the overpull force applied to the jar.
  • 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

HJ Type

  • Standard
  • Ultimate

Nominal OD (inches)

  • 3.12
  • 3.38
  • 3.75
  • 4.25
  • 4.75
  • 5.00
  • 6.25
  • 6.50
  • 8.00
  • 9.00

Length (ft)

  • 9.5
  • 9.0
  • 9.2
  • 11.2
  • 13.3
  • 10.2
  • 9.7
  • 11.5
  • 13.7
  • 10.6
  • 11.3

Thru Bore (inches)

  • 1.00
  • 1.50
  • 1.25
  • 2.00
  • 2.25
  • 3.00

Tensile Yield (lbs)

  • 196,000 to 1,288,000

Torsional Limit (ft.lbs)

  • 6,600 to 128,800

Maximum Pull During Delay (lbs)

  • 41,000 to 270,000

Free Stroke (inches)

  • 7.0
  • 4.0
  • 6.5
  • 6.0

Total Stroke (inches)

  • 11.0
  • 8.5
  • 8.0
  • 10.5

Documentation

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