RBC Capital Markets analyst Kurt Hallead points out that Baker Hughes is the largest player after Schlumberger in artificial lifts -- systems that boost the flow rate of crude oil by pumping or injecting gas into wells -- while GE Oil & Gas is the fourth largest. Spears & Associates estimates that Baker Hughes has a 16% market share in the business while GE has 14%, which combined would amount to almost a third of the market. "[That] could trigger increased anti-trust scrutiny from the U.S. DoJ [Department of Justice]," he said.