Nexans' power umbilicals that integrate HV power supply and umbilical functions within a single cable cross-section were installed for the Chevron-operated Jack/St. Malo gas fields in the Gulf of Mexico.
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From Nexans. |
At a water depth of 2100m, they are the deepest umbilical installation to date.
The power umbilical is an innovative design pioneered by Nexans that integrates the functions of power cables and umbilicals in a single cable, enabling a high-voltage supply to be provided for deepwater projects. A power umbilical includes a number of steel tubes as well as fiber optic elements and signal cables for control and monitoring purposes. By eliminating the need to transport and install a separate power cable, and a control umbilical, the power umbilical significantly reduces transportation and installation costs.
The design of this complex power umbilical is capable of operating at a water depth of 2400m, and with a design life of 30 years. Nexans' specialized cable and umbilical manufacturing facilities in Halden, Norway, designed and manufactured the 42km power umbilical for the two fields in two separate lengths. The two power umbilicals were successfully manufactured and delivered on a transportation barge to a storage location in Mobile, Alabama and installed in July 2014.
The Jack and St. Malo fields are located within 40 km of each other approximately 450km south of New Orleans, Louisiana. The project comprises of three subsea centers tied back to a hub production facility with a capacity of 170,000bbl and 42.5MMcf/d of natural gas.
At the beginning of December, production of crude oil and natural gas began at the Jack/St. Malo project.
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