Incident Report

Subject:                     Norwegian Authority Publishes Report into Well Gas Lift Valve Incident

Date of Email report:   Tue 07/06/2011

Report Detail:

The Norwegian Petroleum Safety Authority (PSA) has published its investigation report into an incident that occurred during the replacement of a well gas lift valve. To replace the gas lift valve, the subsurface safety valve had to be extracted from the well. As this was pulled through the Xmas tree, it became stuck.

The remaining barrier element in the Xmas tree, the upper swab-valve, was blocked. The report states that the incident involved major accident potential in a situation with only one remaining barrier against hydrocarbon outflow from the well. The report can be found here.

Additional Documentation:

Loss of well barriers in connection with wireline operation on the Draugen facility.