Spring Jar

The DTI Spring Jar impacts upwards using a mechanical latch spring system. The mechanism allows a pre-determined firing load to be set by the wireline operator prior to running the Jar and the firing load can be configured without removing the Jar from the toolstring. Once the firing load is reached the Mandrel moves rapidly upwards until stopping suddenly at the upper end of the Jar body generating a large impact force.

Design improvements to the DTI Spring Jar Latch Keys and Latch Sub prolong the life of the parts and minimise spare part requirements over the life of the tool.

The DTI Spring Jar is available dressed for H2S and with alternative Spring configurations for heavy duty pull loads or light duty pull loads, for use with Wireline Tractors for example. A Calibration Sub is available to confirm the firing load prior to running the Jar. 

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  • Field proven latch mechanism
  • Reversible latch keys for long life
  • Simple redress
  • Firing load can be adjusted on or off the tool string
  • Calibrated window ensures accurate adjustment
  • Easy re-cocking action
  • Avaliable with quick connects
  • Can be dressed for H2S

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

Part NumberFish NeckOutside DiameterStandard ConnectionStrokeFiring Load (LBS)Other
150SJAR1.375"1.50"15/16 UN6.00"450 - 950Heavy Duty Firing Load: 800 - 2000LBS
175SJAR1.750"1.75"1 1/16 UN6.00"650 - 1300Heavy Duty Firing Load: 1000 - 3500LBS
188SJAR1.750"1.875"1 1/16 UN6.00"650 - 1300Heavy Duty Firing Load: 1000 - 3500LBS
212SJAR1.750"2.125"1 1/16 UN6.00"650 - 1300Heavy Duty Firing Load: 1000 - 3500LBS
250SJAR2.313"2.50"1 9/16 UN6.00"700 - 1700Heavy Duty Firing Load: 2000 - 5000LBS

Spring Jar

212SJARQC2 Spring Jar

The DTI Spring Jar impacts upwards using a mechanical latch spring system. The mechanism allows a pre-determined firing load to be set by the wireline operator prior to running the Jar and the firing load can be configured without removing the Jar from the toolstring. Once the firing load is reached the Mandrel moves rapidly upwards until stopping suddenly at the upper end of the Jar body generating a large impact force.

Design improvements to the DTI Spring Jar Latch Keys and Latch Sub prolong the life of the parts and minimise spare part requirements over the life of the tool.

The DTI Spring Jar is available dressed for H2S and with alternative Spring configurations for heavy duty pull loads or light duty pull loads, for use with Wireline Tractors for example. A Calibration Sub is available to confirm the firing load prior to running the Jar. 

Features and Benefits

  • Field proven latch mechanism
  • Reversible latch keys for long life
  • Simple redress
  • Firing load can be adjusted on or off the tool string
  • Calibrated window ensures accurate adjustment
  • Easy re-cocking action
  • Avaliable with quick connects
  • Can be dressed for H2S

Data Table

Part NumberFish NeckOutside DiameterStandard ConnectionStrokeFiring Load (LBS)Other
150SJAR1.375"1.50"15/16 UN6.00"450 - 950Heavy Duty Firing Load: 800 - 2000LBS
175SJAR1.750"1.75"1 1/16 UN6.00"650 - 1300Heavy Duty Firing Load: 1000 - 3500LBS
188SJAR1.750"1.875"1 1/16 UN6.00"650 - 1300Heavy Duty Firing Load: 1000 - 3500LBS
212SJAR1.750"2.125"1 1/16 UN6.00"650 - 1300Heavy Duty Firing Load: 1000 - 3500LBS
250SJAR2.313"2.50"1 9/16 UN6.00"700 - 1700Heavy Duty Firing Load: 2000 - 5000LBS

Product Customisation

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