Investigation Report
Synthetic Oil-Based Mud Released Overboard During Reverse Circulation
11-04-2006 11:00 G08831 MC/566 Pollution
- BSEE
- Investigation Report
- Unknown
- Environmental protectionHuman factorsHydrocarbon release
- Drilling
- Valve
- Competence and trainingJob safety analysisPermit to workSafety communication
- Upstream oil and gas
- Marine waters
Summary
An investigation records the overboard release of 127 barrels of synthetic oil-based mud during reverse circulation after cementing. A partially open shunt-line valve allowed the discharge; rough seas delayed loss detection. Findings identify incomplete valve closure and gaps in hazard identification and job safety analysis, with training and work-control changes proposed.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Human factors; human performance; ergonomics.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Drilling; well drilling.
Classifications: Valve; valves.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Job safety analysis; JSA; job hazard analysis; JHA.
Classifications: Permit to work; PTW; work permit.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Marine waters.