Investigation Report
Synthetic-Base Mud Discharge During Circulation Before Storm Packer Setting
08-15-2007 12:30 G15607 GC/743 Pollution - Incident >$25K
- BSEE
- Investigation Report
- Unknown
- Environmental protectionLoss of containment
- Drilling
- Process pipework and pipelinesValve
- Energy and process isolationPermit to workPollution reporting
- Upstream oil and gas
Summary
An investigation records a 62-barrel synthetic-base mud discharge during circulation before setting a storm packer. An inadvertently closed flowline caused overflow, while a previously opened shunt valve provided an overboard route. Reported changes included restricted valve authorisation, permit sign-off, a blind flange and rerouting the pollution-pan drain to skimmer tanks.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Loss of containment; containment loss.
Classifications: Drilling; well drilling.
Classifications: Process pipework and pipelines; process piping.
Classifications: Valve; valves.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Permit to work; PTW; work permit.
Classifications: Pollution reporting.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.