DESCRIPTION:
The Tension Safety Joint is a two stage disconnect tool which is run above the packer that allows the tubing to be disconnected from the tool string below it should the need arise.
APPLICATIONS:
- Ability to disconnect from tool string above packer
- Two stage disconnect to prevent unintentional disconnect
- Adjustable tensile shear pin load for stage 1
- Complete release requires right-hand torque and vertical stroking
OPERATION:
Stage 1: The Tension Safety Joint first requires a predetermined tensile load to be applied from surface in order to sever the shear ring assembly which initiates the disconnection. The tensile load required to shear is dependent of specific requirements and ranges from 4,000 to 66,000 pounds.
Stage 2: The second stage of disconnection requires right hand torque to be applied to the tubing while simultaneously stroking it vertically approximately nine inches. Disconnection requires two strokes per revolution and approximately six revolutions are required. The inner mandrel of the tool is indexed to both the splined housing and the release nut. In rotating the tubing to the right, the mandrel indexes the release nut which has a left hand thread, unscrewing it from the body and separating tool. In the unlikely event that the shear pin assembly is severed unintentionally during operations, the tool will not separate unless right-hand torque and vertical stroking are applied.
| STANDARD | SLIMHOLE | |
|---|---|---|
| O.D. | 5" | 3.125" |
| I.D. | 2.25" | 1.125" |
| Length | 43.7" | 43.7" |
| Pressure Rating | 15,000 PSI | 15,000 PSI |
| Maximum Temp. | 350 ºF | 350 ºF |
| Connections | 3.5 IF | NC 23 |
| Tensile Rating | 240,000 lbs | 100,000 lbs |
| Max. Stroke | 9.25" | 9.25" |
| Service | H2S & CO2 | H2S & CO2 |