- CASE STUDIES
- CHEMICALLY CONTAMINATED WELL
- Coil Tubing Recovery
- EPS Workover
- HPHT Underbalanced Drilling
- Live Well Sandscreen Installation
- Live Well SSSV Installation
- NUI Workover
- Offshore Live Well Fishing
- Onshore Re-Abandonment
- Rigless Abandonment
- Safeguarding a Blown Out Well
- Straddle Recovery
- Underbalanced Drilling
- WATER PRODUCTION SHUT OFF
CHEMICALLY CONTAMINATED WELL
Objective
This well was a cavern used for chemical storage. The chemicals stored had caused serious corrosion of the well and its components to the extent that the integrity of the system was questionable. The well owner decided to P&A the well when it was still under pressure so that the contaminated fluids / gases remained down hole.Well Details
Depth: 420 meter
WHP: 45 bar
Completion: 4-½" @
Casing: 6-5/8"@ 9-5/8" @ 11-¾" @
WHP: 45 bar
Completion: 4-½" @
Casing: 6-5/8"@ 9-5/8" @ 11-¾" @
Execution
- Remove old derrick structure and modify location
- Snub out "Hydraulic cylinder" and 4-½" completion
- Mill multi-windows in 6-5/8" under pressure
- Set multiple plugs in 9-5/8"
