Halliburton Company provides various products and services to the energy industry worldwide. It serves the upstream oil and gas industry throughout the lifecycle of the reservoir, from locating hydrocarbons and managing geological data, to drilling and formation evaluation, well construction and completion, and optimizing production through the life of the field. The company operates in three divisions: Drilling, Evaluation, and Digital Solutions; Fluid Systems; and Production Optimization. The ...

Petroleo Brasileiro S.A.Petrobras, together with its subsidiaries, engages in the exploration, exploitation, and production of oil from reservoir wells, shale, and other rocks in Brazil. It supplies oil, liquefied natural gas, and natural gas to refineries in Brazil; and sells surplus production in Brazil and foreign markets. The company also provides refining, logistics, and transportation services, as well as involves in the purchase of crude oil, oil products, and fuel alcohol. In addition, P ...