Investigation Report
Casing Weld Failure During Well Abandonment
01-18-2017 04:00 G02646 EB 159 Other - Casing Weld Failure
- BSEE
- Investigation Report
- Unknown
- Pressure systemsWell integrity
- Hot workPressure testingWell abandonment
- Blowout preventer
- Job safety analysisManagement of changeOperating and work proceduresPressure relief
- Upstream oil and gas
Summary
Investigation of a casing weld failure during well abandonment. Reverse circulation following bit plugging led to casing rupture at recently welded seams. The report examines pressure testing, unchanged pump safety-device settings, inadequate job safety analysis and unapproved welding in place of cold cutting. No injuries or environmental spills occurred.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Well integrity; well life cycle integrity.
Classifications: Hot work; welding and cutting.
Classifications: Pressure testing; hydrostatic testing; pneumatic testing.
Classifications: Well abandonment; plug and abandonment; P&A.
Classifications: Blowout preventer; BOP; blow-out preventer.
Classifications: Job safety analysis; JSA; job hazard analysis; JHA.
Classifications: Management of change; MOC; change management.
Classifications: Operating and work procedures.
Classifications: Pressure relief; overpressure protection.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.