Electric line · Intervention
Bridge Plug
A downhole tool set inside the casing to isolate the lower part of the well.
What it does
Seals off a lower zone permanently, or isolates it temporarily while an upper zone is treated. Retrievable plugs are unset and pulled after use; permanent plugs stay.
Basics
| Types | Retrievable or permanent |
| Uses | Zone isolation, treatment of an upper zone, abandonment |
| In Alberta abandonment | Pressure tested to 7,000 kPa for 10 minutes |
Common failures
- Plug that does not hold pressure
Troubleshooting
- Symptom
- Pressure test above the plug bleeds off
- Likely cause
- Plug not sealing
- What to check
- Reset or replace the plug and retest before continuing