UPDATE 1-Driller Rowan writes down assets by $438.4 mln in 4th qtr
February 27, 2015 at 09:22 AM EST
Feb 27 (Reuters) - Contract driller Rowan Cos Plc wrote down the value of 12 of its oldest jack-up rigs by $438.4 million, joining rivals such as Transocean Ltd in recording big asset impairment charges.
