Intervention expert Stephen Stragiotti is a big fan of Well Tractors, which his company helped to develop nearly a decade ago and are now used extensively throughout the Norwegian Continental Shelf and worldwide. "The Well Tractor was first field tested in March 1996 in Gullfaks well number B33. It was first developed by Welltec in Denmark with Statoil," Stragiotti recalled.
Maritime Well Services in Norway has also been supplying the technology.
Since then at least 1,062 miles (1,700 km) of tractor-travel distance has been clocked up by the operator.