The acquisition of ChampionX helped the world’s biggest oilfield services provider, SLB (NYSE: SLB), raise its North America revenue by 15% in the fourth quarter versus Q3 despite the softer market in the U.S. shale industry. SLB, which completed the acquisition of chemicals and engineering oilfield services provider ChampionX in the third quarter, saw its North America revenue surge by 26% year-over-year in the fourth quarter, the company said in its Q4 results release on Friday. SLB reported $0.78 earnings per share for the fourth quarter,…