Troll line starts
Work on laying Troll Oil Pipeline II was initiated on 15 March as part of Statoil's Vestprosess project.
This facility is due to run from Norsk Hydro's Troll C platform in the North Sea to the Mongstad complex near Bergen. It will parallel the existing Troll Oil Pipeline I, which links with Hydro's Troll B installation.
The first step is to pull the new line from the Castoro Sei laybarge into Mongstad through a 480-metre shaft which emerges at a depth of 220 metres in the adjacent Fens Fjord. Drilling and lining of this borehole was completed on 13 March.
"Once the pull-in operation has been finished, laying will continue out to Troll C," reports project director Leif Solberg in Vestprosess.
With a diameter of 20 inches, Troll Oil Pipeline II will be 82 kilometres long. Plans call for Castoro Sei to complete the laying operation on 1 May.
Laying of a gas line between Troll C and Statoil's Troll A gas platform is also due to be finalised on the same date.
Troll Oil Pipeline II is scheduled to be ready for operation on 1 November.