One of the largest oilfield services companies in the world, Halliburton serves the upstream oil and gas industry in 80 countries with a complete range of services, from the location of hydrocarbons to the production of oil and gas. It operates in two segments: Drilling and Evaluation and Completion and Production. Services include providing production optimization, drilling evaluation, fluid services, and oilfield drilling software and consulting. It combines tried-and-true well drilling and optimization techniques with high-tech analysis and modeling software and services. In a major expansion, in 2014 the company agreed to acquire Baker Hughes for about $35 billion, but the deal fell through in 2016.