Naftogaz invites foreign oil companies to participate in gas production in Ukraine; the first contract is close to being signed. The Ukrainian company is negotiating with ExxonMobil, Chevron, and Halliburton regarding their potential participation in Ukrainian gas production, said Naftogaz chairman Oleksiy Chernyshov. The compa... #GasProductionUkraine #Halliburton #Naftogaz #OleksiyChernyshov