Incident ID: 8662
Explosions or burns
Drilling, workover, well services
A jet fire developed at a wellhead site during a Coil Tubing Operation performed by a CTU Contractor at an injection well. The gas injection manifold had been left under pressure and isolated via the manual wing valves. A gas leakage occurred due to the ejection of an instrument plug at the Manual Wing Valve flange from its seat. The damage of the plug was caused by a shock from external source, presumably caused by the CTU mast moved by an incoming sand storm, associated with the gas line internal pressure.
The jet fire caused complete destruction of the coil tubing equipment and spread to the adjacent vehicles. The thermal radiations associated to the jet fire caused a 3rd degree burn for a contractor helper located in close proximity of the jet fire, who died.
What Went Wrong:
Life-saving rule violation (Energy Isolation), procedure followed incorrectly, the isolation valve at the inlet to the well pad was left open.
Strictly apply the LOTO procedure according to the outcomes of the Risk Assessed Method Statement for coil tubing operations.
Drilling/Well Servicing Operator