FILE - This Oct. 18, 2007, file photo, shows a Schlumberger logo on a tower at the entrance to Schlumberger's Sugar Land, Texas campus. Schlumberger will spend about $1.7 billion for a minority stake in a big Russian energy company at a time when the country's relations with the West are under strain and as energy prices hit multiyear lows, according to reports, Tuesday, Jan. 20, 2015. (AP Photo/Pat Sullivan, File)