Major oil and gas service companies
19 Mar 2019 Rosneft, the biggest oil and gas company in Russia, boosted its revenue by 31.4 % to $133.7bn in 2018. The company's oil and liquids production 29 Jun 2019 Irish oil and natural gas service company Weatherford's revenues in 2018 remained steady at $5.74bn compared to $5.69bn in 2017.