Nexans Norway - Subsea Umbilicals, Capjet Trenching and Spider Dredging, Direct Electrical Heating (DEH) of Subsea Flowlines

Nexans Norway is a manufacturer and supplier of advanced subsea products and services for the oil and gas industry. Nexans has a totally integrated umbilical operation, from engineering and steel tube welding, manufacturing and installation to qualification testing and hook-up.

Nexans Norway introduced the first steel tube umbilical in 1993, and the first dynamic steel tube umbilical in 1995. The company has supplied more than 1,800km of umbilicals, including a record-breaking length of 145km to Statoil's Snøhvit and an installation depth of 2,300m to Shell's Nakika.

SNØHVIT, NORWAY

Five subsea umbilicals containing electric power supply cables, fibre optic cables, hydraulic tubes for controlling and injection of chemicals for Statoil's Snøhvit Field in the Barents Sea were supplied in 2005 and installed same year. The main cable with a length of 145km delivered in one piece is installed between the onshore factory at Melkøya and the main central in the Snøhvit area. The four infield lengths with a total length of approx. 29km from the main central to each well template.

ORMEN LANGE, NORWAY

Two main umbilicals, 125km each and one infield umbilical of 4km will be delivered for installation in 2006 and 2007. The umbilicals from Nyhamna, Norway, to the Ormen Lange field will supply hydraulic fluid, electrical power and fibre optic signals required to operate the subsea production systems at 850m water depth.

DOLPHIN

Nexans Norway will manufacture and install the chemical injection/control umbilicals for the Dolphin Gas project in the Middle East. The two Nexans umbilicals, with respective lengths of 90km and 75km, will link two offshore platforms to the Dolphin Ras Laffan processing plant in Qatar. They will supply corrosion inhibitor, hydrate inhibitor and diesel fuel to the two platforms, as well as facilitating communication via a fibre optic element. Installation will take place in 2006.

THUNDER HORSE

BP's Thunder Horse is one of the largest oilfields discovered in the Gulf of Mexico. Nexans delivered 120km steel tube umbilicals to this field in 2005. The umbilicals are installed in maximum water depth of 1,890m.

NAKIKA

10 umbilicals, totally 135km, were supplied to Shell for the Nakika project in the Gulf of Mexico in 2003. The umbilicals contain lines for hydraulic control, chemical injection, and transfer of electrical power, and communication signals. They interlink six oil fields, and were installed in 2003 at maximum water depth of 2,300m.

ABU SAFAH

Nexans Norway manufactured and installed five interplatform cables of totally 70km, and 120km of fibre optic cable to Saudi Arabian Oil Company (Saudi Aramco). The cables feed electrical power, and transmit communication signals from shore to a platform hub, and five satellite platforms in the Abu Safah field in the Persian Gulf. The cables were installed in 2004.

DIRECT ELECTRICAL HEATING (DEH) OF SUBSEA FLOWLINES

Nexans Norway has been involved in the development of DEH system since the very beginning and has delivered the following cable and subsea systems so far: Åsgard (2000), Huldra (2002), Kristin (2004) and Norne (2005).

CAPJET TRENCHING AND SPIDER DREDGING

The Capjet trenching system has been developed to provide an efficient solution for protection of submarine cables, umbilicals and pipelines based on the water jetting principle. Capjet has buried 4,500km since it was first introduced in 1976. To provide large volume dredging capability in difficult topographical areas, Nexans Norway has developed a complete new dredging vehicle named Capjet Spider, based on the Capjet basic design. The system was used for the Ormen Lange Project in 2004 and 2005.