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Hydraulic Jar Accelerator
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Hydraulic Jar Accelerator

Brand: Wenzel Downhole Tools
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The Wenzel Downhole Tools Hydraulic Jar Accelerator is a hydraulic spring that stores energy when tension is applied to the drilling string.  

During the jarring stroke, the energy is released upwards to accelerate the drill collars and the upper portion of the jar, intensifying the jarring impact.
Features
  • Featuring a sealed and lubricated spline drive, the Accelerator will provide long service life under high torque and stroking applications.
  • Full torque can be transmitted through the Accelerator.
  • The operation of the Accelerator is independent of the fluid circulation.
  • The Accelerator is useful in shallow holes where little pipe stretch is available.
  • Recommended for use in extended reach or highly deviated wells where jar performance could suffer due to hole drag.
  • Standard seals in the tool are effective to 250°F (120°C). The sub can be dressed with seals effective to 400°F (200°C) for hot hole environments.  External sealing surfaces are tungsten carbide-coated to enhance wear and corrosion resistance.

Specifications

Brand

Nominal OD (inches)

  • 6-5/8"
  • 3-3/8'
  • 4-3/4"
  • 6-1/2"
  • 6-3/4"
  • 7"
  • 8"
  • 8-1/4"
  • 9-1/2"

Accelerator Type

  • Single Acting
  • Double Acting

Length (ft)

  • 11.3
  • 13.5
  • 14.4
  • 20.9
  • 14.7
  • 22.2
  • 15.0
  • 15.3
  • 15.5
  • 19.8
  • 14.3

Thru Bore (inches)

  • 1.00
  • 1.50
  • 2.25
  • 2.75
  • 3.00
  • 2.81

Tensile Yield (lbs)

  • 227,000
  • 235,000
  • 371,000
  • 370,600
  • 970,000
  • 1,220,000
  • 999,000
  • 994,000
  • 1,163,000
  • 1,294,000
  • 1,164,000
  • 1,658,000

Torsional Limit (ft.lbs)

  • 5,700
  • 9,000
  • 22,800
  • 56,300
  • 63,700
  • 61,500
  • 66,000
  • 65,100
  • 86,200
  • 89,400
  • 139,900

Load to Extend (lbs)

  • 34,000
  • 36,000
  • 58,000
  • 42,000
  • 141,000
  • 99,400
  • 136,000
  • 150,000
  • 160,000
  • 198,000
  • 138,500
  • 21,000

Load to Compress (lbs)

  • 31,000
  • 43,900
  • 63,700

Stroke (inches)

  • 8.0
  • 12.5
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