Surface · Well Testing
Data Header
A short spool upstream of the choke manifold with ports for gauges, transmitters, sampling points and chemical injection.
What it does
Gives one place to measure wellhead pressure and temperature, take samples and inject chemicals such as hydrate inhibitor before the choke.
Basics
| Measures | Wellhead pressure and temperature |
| Ports | Gauges, transmitters, sampling, injection |
| Location | Upstream of the choke manifold |
Common failures
- Gauge or transmitter reading that drifts from the real wellhead pressure
Troubleshooting
- Symptom
- Two pressure readings on the header do not agree
- Likely cause
- Plugged port, hydrate or out of calibration instrument
- What to check
- Bleed and clear the port, compare against a calibrated gauge