Page 58: of Offshore Engineer Magazine (Aug/Sep 2013)

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separator which allows the fuid to pass the electrodes and be exposed to the electrical feld,” Bjørklund says. “Following electrostatic treatment,

Production water quickly settles to the bottom of the separator and is piped to the water treatment system, while the crude oil fows across to the oil section.”

Installing VIEC technology has to be planned carefully. The equipment must be a correct ft at the frst attempt and the installation process must be performed quickly to reduce down- time. The whole installation also has to be performed through a manhole just 18-24 inches wide. As well as being designed to pass through the manhole, the component parts have to be bolted installation is complete.” the world’s primary crude oil produc- together inside the separator unit. “To To deliver the correct VIEC solution ing zones. In addition to a library of secure safe and on-time installation, for each customer, Wärtsilä analyzes real crude oil samples, this allows

Wärtsilä performs a full-scale test and characterizes the crude oil that it Wärtsilä to build up a unique database installation prior to equipment deliv- will be handling. “Crude oils are very of knowledge.

ery,” Bjørklund says. “While install- complicated liquids and are all very Characterization of the crude oil ing a VIEC system inside a separator different by nature,” Bjørklund says. includes determining its dielectric takes just a few days, additional time is Customers send a 20–100 liter sample properties, viscosity, density, surface/ required for depressurizing and clean- of crude to the Wärtsilä laboratory in interface characterization, asphal- ing prior to installation, and pressur- Norway. Wärtsilä has analyzed more tene stability and emulsion stability, izing and re-commissioning after the than 80 different crude oils from all of as well as inorganic/organic solid

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