Downhole · Rod Pump
Production Tubing & Anchor
The tubing that carries the pumped fluid to surface, usually held in place near the pump by a tubing anchor.
What it does
Conveys production to the pumping tee. Anchoring keeps the tubing from stretching and moving with every stroke, so the pump stroke is not lost.
Basics
| Carries | Produced fluid and the rod string |
| Anchor | Holds the tubing against the casing |
| If unanchored | Tubing stretch shortens the effective pump stroke |
Common failures
- Unanchored tubing or a slipping anchor, so the tubing moves each stroke
Troubleshooting
- Symptom
- Plunger stroke shorter than the polished rod stroke
- Likely cause
- Tubing moving, unanchored or slipping anchor
- What to check
- Compare the polished rod and plunger position plots, then check the anchor