**FILE** In this Oct. 18, 2007 file photo, a sign tower reaches toward the sky at the entrance to Schlumberger's Sugar Land, Texas campus. Oilfield services provider Schlumberger Ltd. opened the petroleum sector's midyear earnings period on a strong note Friday, reporting a nearly 13 percent jump in profit driven by robust spending among customers searching for new sources of crude and natural gas. (AP Photo/Pat Sullivan, file)