Cause & Consequence
- Release of a harmful substance
Incident Info Source
Step change in safety
Specific Incident Equipment
The break occurred between the valve and the connection to the casing, causing an uncontrolled flow of sour gas.
There were no specific procedures for obtaining well pressures and no drawings for the wellhead piping.No personnel were present who had knowledge of well configuration.Failure of previous operator to isolate tubing pressure and flow from the control line.
Operations personnel to identify wellheads with piping configurations that are similar or confusing and have Production Engineering update P&ID’s and other process control documentation and accessible.