By Kate Abnett BRUSSELS (Reuters) – Sanctions imposed by the European Union on Russia over its invasion of Ukraine would gradually hit Moscow’s income from oil, despite not targeting Russian oil and gas exports directly, the EU’s energy policy chief said on Thursday. The 27-country EU has imposed several packages of sanctions on Russia, including a ban on the export of specific refining technologies to Russia from Europe, making it harder and more expensive for Russia to modernise its oil refineries. “These technologies are built in Europe, they cannot be easily placed globally by other suppli…