Investigation Report
Synthetic-Based Mud Discharged Overboard Following Managed Pressure Drilling Kick
11-16-2022 0510 G36191 EB 699 Pollution
- BSEE
- Investigation Report
- Unknown
- Environmental protectionLoss of containmentWell control
- Drilling
- Valve
- Operating and work proceduresPressure relief
- Upstream oil and gas
- Marine watersVessel
Summary
BSEE investigates an approximately twelve-barrel synthetic-based mud discharge from West Vela following a saltwater kick during managed pressure drilling. Relief-valve flow was directed overboard rather than to the flowline. The report identifies that decision as the probable cause and records operator recommendations concerning influx thresholds, pressure settings and flow-control software.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Loss of containment; containment loss.
Classifications: Well control; kick control; loss of well control.
Classifications: Drilling; well drilling.
Classifications: Valve; valves.
Classifications: Operating and work procedures.
Classifications: Pressure relief; overpressure protection.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Marine waters.
Classifications: Vessel; aboard ship; onboard vessel.