TCO drops oil output 3.8% in H1

    By Svetlana Antoncheva     TengizChevroil LLPcut oil output 3.8 percent in the first half of 2012 from a year earlier as it carried out maintenance.     Crude production fell to 12.5 million metric tons, or 100 million barrels, from 13 million tons, or 104 million barrels, in H1 2011, the company said in a...