Overgas Inc. is the biggest private gas company managed by Sasho Dontchev, that search for oil and gas near the Provadia and is founded in 1991 in Bulgaria
AD is the biggest private gas company in Bulgaria. Its executive director is Sasho Dontchev. 1991 Sofia, Bulgaria In partnership with the British-based JKX Oil & Gas and with the Bulgaria-based Balkan Explorers the company search for oil and gas near the Provadia. 
