Two stage disconnect with torque-through capabilities


  • Drill stem testing
  • Tubing-conveyed perforating
  • Completions


  • Two stage disconnect to prevent unintentional disconnect
  • Transfers torque

The Tension Safety Joint provided a means to disconnect the drill string from the rest of the down hole assembly. Torque can pass through the tool without loading the shear pins. There are two steps required to separate the Safety Joint:

1. A predetermined tensile load to shear the pins is applied
2. Followed by right hand rotation (approximately 6 rotations) accompanied by moving the drill stem up and down (approximately 8”) twice per rotation.


O.D. in [mm] 5.0 [127]
I.D. in [mm] 2.25 [57]
LENGTH COLLAPSED in [m] 43 [1.1]
WEIGHT lb [kg] 160 [72.6]
MAX TEMPERATURE degF [degC] 350 [177]
PRESSURE DIFFERENTIAL (annulus/tubing) psi [kPa] 15,000 [103,421]
MAX STROKE in [mm] 10.25 [260.4]
TENSILE STRENGTH lbf [kN] 203,000 [902]
(premium connections available)
3-1/2 API IF
Service Standard and sour service above 175 degF as per NACE MR 0175

*Slim hole version available upon request.

Download Spec Sheet