Surface · PCP
TEC Wellhead Outlet
A pressure rated fitting that takes the TEC line out through the wellhead to the surface cable, without opening a leak path.
What it does
Seals on the TEC tube so the wellhead stays a full pressure barrier, and hands the signal over to the surface readout. Used on PCP and other artificial lift wells that carry a downhole gauge.
Basics
| Tube sizes | 1/8 in, 1/4 in or 4 mm |
| Connections | NPT 3/8, 1/2 or 3/4 in, plus a 9/16 in high pressure option |
| Pressure rating | 10,000 psi |
| Material | 17-4PH stainless |
| Temperature | Up to 150 °C |
Common failures
- Outlet not rated for wellhead pressure
- Fitting not matched to the TEC size, so it never seals
- Tube nicked or overtightened at the ferrules during makeup
Troubleshooting
- Symptom
- Gauge reads fine but there is a small leak at the outlet
- Likely cause
- Ferrule not seated or wrong size fitting
- What to check
- Bleed down, check fitting size against the tube, remake with new ferrules
- Symptom
- Signal lost after hookup
- Likely cause
- Conductor damaged at the outlet transition
- What to check
- Continuity and insulation test across the outlet before and after hookup