Shipments of oil products from a Russian Black Sea port, hit by a managerial conflict, have 'collapsed,' Transneft says. : LONDON/MOSCOW, Feb 21 (Reuters) - Shipments of oil products from a Russian Black Sea port, hit by a managerial conflict, have "collapsed", Russian oil pipeline monopoly Transneft said on Wednesday. A Transneft spokesman said as many as six tankers have been held up at the port of Novorossiisk and 2,400 railcars have been waiting for reloading.