Downhole · Gas Lift
Standing Valve
A one way valve at the bottom of the tubing that lets formation fluid in but not back out.
What it does
Isolates the tubing from the formation so the gas pressure pushes the fluid up instead of back into the reservoir. Used mainly in intermittent lift.
Basics
| Used in | Intermittent and chamber gas lift |
| Flow | One way, formation into tubing |
| Seats in | A seating nipple at the lower end of the tubing, held by a wireline lock |
Common failures
- Leaking valve lets fluid fall back each cycle
Troubleshooting
- Symptom
- Each intermittent cycle lifts less liquid
- Likely cause
- Standing valve leaking
- What to check
- Retrieve the valve by wireline and inspect it