LONDON--(BUSINESS WIRE)--Schlumberger Limited (NYSE:SLB) today reported results for the second quarter of 2015.           (Stated in millions, except per share amounts) Three Months Ended Change Jun. 30, 2015 Mar. 31, 2015 Jun. 30, 2014 Sequential Year-on-year Revenue $ 9,010 $ 10,248 $ 12,054 -12 % -25 % Pretax operating income 1,708 1,993 2,621 -14 % -35 % SLB income from continuing operations, excluding charges and credits* 1,124 1,358 1,800 -17 % -38 % Diluted EPS from continuing operations