Dual Action Spring Jar

The DTI Dual Action CT Spring Jar enables repeatable upward or downward jarring blows to the work string.

The amount of tension or compression placed on the coiled tubing in order to fire the jar is dependent on the amount of preload placed into the jar springs, which is adjustable at surface.

The release loads are relatively light, typically 1500LBS – 5000LBS, depending on Jar O.D. size. Because there is no hydraulic chamber inside the Jar, it is not susceptible to high temperature, has increased impact ratio and requires very little force to re-cock.

The DTI Dual Action CT Spring Jar is simple to operate and to redress. A calibration tool is available in order to surface test the Jar release load.

Download Product PDF
  • High impact ratio
  • Very low re-cocking force
  • Field re-dressable
  • Suitable for very high temperature wells

DTI offer alternate sizes, materials and thread connections. Please contact us for more information.

Part NumberOutside DiameterInside DiameterStrokeFiring Load (LBS)
DAS212**THREAD2.125"0.25"4.0"1,000 - 2,000
DAS225**THREAD2.25"0.25"4.0"1,000 - 2,000
DAS250**THREAD2.50"0.50"4.5"1,000 - 3,500
DAS288**THREAD2.875"0.88"6.0"1,500 - 5,000
DAS312**THREAD3.125"1.06"6.0"1,500 - 5,000
DAS350**THREAD3.50"1.25"6.0"1,500 - 5,000

Dual Action Spring Jar

DAS288AA23 Dual Action Spring Jar

The DTI Dual Action CT Spring Jar enables repeatable upward or downward jarring blows to the work string.

The amount of tension or compression placed on the coiled tubing in order to fire the jar is dependent on the amount of preload placed into the jar springs, which is adjustable at surface.

The release loads are relatively light, typically 1500LBS – 5000LBS, depending on Jar O.D. size. Because there is no hydraulic chamber inside the Jar, it is not susceptible to high temperature, has increased impact ratio and requires very little force to re-cock.

The DTI Dual Action CT Spring Jar is simple to operate and to redress. A calibration tool is available in order to surface test the Jar release load.

Features and Benefits

  • High impact ratio
  • Very low re-cocking force
  • Field re-dressable
  • Suitable for very high temperature wells

Data Table

Part NumberOutside DiameterInside DiameterStrokeFiring Load (LBS)
DAS212**THREAD2.125"0.25"4.0"1,000 - 2,000
DAS225**THREAD2.25"0.25"4.0"1,000 - 2,000
DAS250**THREAD2.50"0.50"4.5"1,000 - 3,500
DAS288**THREAD2.875"0.88"6.0"1,500 - 5,000
DAS312**THREAD3.125"1.06"6.0"1,500 - 5,000
DAS350**THREAD3.50"1.25"6.0"1,500 - 5,000

Product Customisation

DTI offer alternate sizes, materials and thread connections. Please contact us for more information.