Downhole · Jet Pump
Combined Fluid Return
The path that brings the mixture of power fluid and produced fluid back to surface: the casing annulus or a second, parallel tubing string.
What it does
Jet pumps are always an open power fluid system: power fluid and production mix in the pump and return together.
Basics
| System | Open power fluid (fluids mix) |
| Path | Casing annulus or parallel tubing string |
| Lift depends on | Discharge pressure and gas in the return |
Common failures
- Return path restricted by paraffin or scale
- Casing exposed to corrosive return in annulus returns
Troubleshooting
- Symptom
- Wellhead return pressure climbing
- Likely cause
- Restriction in the return path
- What to check
- Check for deposits; consider chemicals in the power fluid