Field_DevelopmentTotal chases new North Sea platforms - here's which companies have been invited to bidFrench supermajor approaches diverse range of engineering fabricators looking to supply facilities for Halfdan North and Valdemar Bo South fieldsNew developments: the Halfdan field off Denmark, where Total is looking to install a new unmanned platform, along with one on the Valdemar fieldPhoto: AP/SCANPIXRob WattsLondon