Pump · Jet Pump
Nozzle
The restriction at the top of the jet pump where power fluid speeds up into a high velocity jet.
What it does
Turns high pressure, slow power fluid into a fast, low pressure jet (Venturi effect). The low pressure draws well fluid into the pump.
Basics
| Principle | Venturi effect |
| Sets | How much power fluid the pump uses |
| Change out | At surface, without a rig |
Common failures
- Erosion that enlarges the orifice
- Plugging by solids or debris
Troubleshooting
- Symptom
- Power fluid rate rises at the same pressure
- Likely cause
- Eroded nozzle
- What to check
- Retrieve the pump and inspect the nozzle