Drifting barge forces oil field closures and worker evacuations off the coast of Norway..

A drifting barge has forced BP Plc and ConocoPhillips to shut oil fields in the North Sea and evacuate workers from production platforms.

BP fully shut production and will evacuate all workers from the Valhall field in Norway’s section of the North Sea, spokesman Jan Erik Geirmo said by phone Thursday. Conoco has closed the Eldfisk and Embla fields and moved 145 people from Eldfisk, 95 of them to the shore, spokesman Stig Kvendseth said by e-mail.

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