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  • Norway: Workover control systems prove their merit offshore


    J. Jansing

    Originally operating as the Competence and Service Department within Aker Kvaerner Elektro, Advantec AS was established as an independent company in January 2005. The firm supplies workover control systems (WOCS), among a number of other production and workover-related devices and systems for use on major subsea projects. Upgrading and retro-fitting of WOCS is also provided. KRISTIN—A FORMIDABLE TESTING GROUND The firm’s more recent work on Kristin field is a key benchmark for the WOCS technology. Located in the southwestern part of the Haltenbank of the North Sea, Kristin field was originally discovered by Saga Petroleum in 1997, with the ownership passed to Statoil in 2000. Situated in shallow water depths of 360-380 m (1,181 to 1,247 ft), with the reservoir almost 5,000 m (16,405 ft) beneath the seabed, Kristin has high pressures and temperatures. Reservoir pressures are about 911 bar (740 bar, Shut-In Wellhead Pressure (SIWHP)), and reservoir temperatures are around 167°C.

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