A worker checks the valve of an oil pipe at Lukoil company owned Imilorskoye oil field outside the Siberian city of Kogalym

A worker checks the valve of an oil pipe at Lukoil company owned Imilorskoye oil field outside the Siberian city of Kogalym

An oil worker at twilight in Siberia. Photo: Reuters / Sergei Karpukhin

December 12, 2016 10:47 AM (UTC+8)