‘Cheese Wire’ Concept for Arctic Subsea Pipelines Presented

Two innovative Ramboll engineers have developed an idea to protect subsea pipelines in the Arctic region and to avoid their collisions with icebergs.

The idea, initially rewarded in the Ramboll Oil & Gas innovation competition, presents a concept for deep burial of pipelines using a “cheese wire” process design.

Pipeline engineers Francesca Del Din and Farzin Hafezparast from Ramboll Oil & Gas have introduced a new “cheese wire” process design as an alternative to trenching. They will present the process and its benefits at the Offshore Pipeline Technology Conference in Amsterdam on February 26, 2015.

“In short, the slicing action of the wire into the seabed bears resemblance to the mechanism used to slice cheese. Our study focusses on the technical aspects of installation and targets the field developments in the Canadian Grand Banks region, which is synonymous with iceberg activity,” says Francesca Del Din.

“The concept ensures a feasible, efficient installation procedure with low financial consequences and minimal environmental impact compared to traditional pipeline installation methods. This innovative solution is a step forward in developing previously unfeasible oil fields in the harsh Arctic environments,” Farzin Hafezparast adds.

Using the patent-pending “cheese wire” process to achieve deep burial of a steel wire, the pipeline can be dragged through the seabed using similar technology to horizontal directional drilling. This allows the pipeline route to bypass the most dangerous iceberg corridors so that hydrocarbons can be transported safely to onshore processing facilities, Ramboll wrote.

The concept can help to significantly reduce the costs and risks associated with offshore topside operations in Arctic waters.

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