Statoil said Friday it is amending its routines for oil drilling operations on the Gullfaks C platform in the North Sea following an incident in May.

-The incident, which did not result in any injuries or environmental damage, was caused by leakage in a well casing.

-An investigation points to deficiencies in connection with risk management and compliance with internal requirements for drill operation planning and execution.

-The most important measures following the incident are linked to risk analyses and acceptance criteria when complexity increases, supporting documentation, quality assurance and formalism in planning and decision-making, and involving technical expertise.

-Statoil has handed over its investigation report to the Petroleum Safety Authority
Norway .