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DHS system

Nexans has signed a contract worth €100m with BP to install direct electrical heating (DEH) cable systems at BP’s Shah Deniz field, located in the Azerbaijan sector of the Caspian Sea.

As part of the DEH project, Nexans will deliver a total of 130km of the cable system to provide flow assurance for a total of ten subsea flow lines.

Nexans will design, engineer and manufacture the DEH systems, including riser cables, piggy back cables and accessories, at its subsea cable and umbilicals facility in Halden, Norway.

The systems include an integrated protection system (IPS) to protect the piggy back cables against damage after installation on the sea floor.

According to Nexans, the first and second system will be delivered in July 2014 and June 2016, respectively.

Nexans Norway hybrid underwater cables division vice-president Krister Granlie said: "This contract forms part of the ten-year frame agreement Nexans concluded with BP to supply umbilical cables, DEH systems, accessories and services for various deep-water oil and gas projects across the globe.

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"According to Nexans, the first and second system will be delivered in July 2014 and June 2016, respectively."

"It represents further recognition of the key role that our state-of-the-art DEH technology can play in providing reliable and environmentally friendly flow assurance.

"We have already performed several pre-studies in cooperation with BP regarding the application of DEH systems across the Shah Deniz field."

DEH technology for flow assurance has been developed to safeguard wellstream flow through the pipeline to the platform.

Alternating current (AC) transmitted from the DEH cable runs through the steel in the pipe, which heats up due to its own electrical resistance allowing the pipeline to be operated in an environmentally safe manner.

Image: Nexans direct electrical heating (DEH) cable systems. Photo: courtesy of Nexans S.A.

Nri energy