Offshore drilling


During the year, Stena Drilling introduced root cause analysis training for senior crewmen and officers on ships and rigs. The aim is to improve their ability to see the root causes of why accidents occur, which will make them more adept at avoiding accidents in the future.

Stena Drilling had an operational utilisation rate of 98% in 2014.

The method behind root cause analysis is called the 5 WHY & WHY Tree and is based on asking the question “Why” until the underlying source of the problem/accident has been identified. It is important to ensure that it is the actual cause that is found, in order to prevent the problem from happening again. In addition, the measures required to eliminate the root cause must be specified, measurable and realistic to implement.

Root cause analysis training is conducted by an external party and consists of a two-day course culminating in an examination. At the end of 2014, 87 people – mainly managers, supervisors and safety staff – had completed the training.

Training and exchange of experience

Alan Mair, Safety Officer on board Stena Forth, participated in the Root Cause Analysis training in the beginning of 2014.

“The training was very worthwhile. I had previously done accident investigations, but it was very useful to learn the method of the 5 WHY & WHY Tree as per updated procedures. It was also good to share opinions and experiences with the other participants,” says Alan.

The training is based on theory and practical examples, which Alan appreciated. After returning to his workplace, he has held accident investigation workshops for colleagues on board, and shared the knowledge he gained from the training. Overall, Alan was very satisfied with the training.

“It would be useful with a re-training session in a ­couple of years, to continue to move forward and keep the knowledge up-to-date,” he says.

Engagement above industry average

Stena Drilling is an active member of “Step Change in Safety”, an organisation made up of representatives from the oil and gas industry in the UK. The organisation’s vision is to make the UK the safest place in which to work within the global oil and gas industry.

This collaboration has led to the development of a cross-sector employee survey called the Workforce Engagement Survey. The goal of the survey is to find out whether employees, in addition to following the rules, are also encouraged to actively work to improve safety.

More than 10,000 employees in the oil and gas industry have taken the survey. Stena Drilling introduced the survey in 2013, and by the end of 2014, the crews of the company’s entire fleet had conducted the survey. A total of 988 employees took part and the results show that engagement in safety matters by Stena Drilling’s employees is above the industry average.

Working as we do with fossil fuels means taking major responsibility. We focus on safety, health and working environment on board the rigs.

– Tom Welo, CEO Stena Drilling

Safe handling minimises oil spills

In 2014, oil spillage from Stena Drilling’s operations amounted to 1 litre. This should be seen in relation to Stena Drilling’s annual handling and consumption of about 80,000 tonnes of fuel and 800 m3 of hydraulic oil on board the units.

Total oil spillage


Stena Drilling’s rigorous safety work is paying off. In October, Stena Drilling’s fleet celebrated 12 months without any LTIs. The rest of 2014 also continued without any reported Lost Time Incidents.

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