Exhibitors from 38 countries represented over 4,000 Iranian and foreign international companies at the showcase, touted as the largest annual convention in Iran's petroleum industry.

The four-day exhibition is sponsored by the Iranian Ministry of Petroleum and its subsidiary the National Iranian Oil Company.

The exhibitors see the event as great opportunity to directly get in touch with major foreign companies and domestic producers to undertake mutual cooperation and strike contracts in the upstream and downstream oil sectors.

Last year's exhibition was attended by 800 international companies from China, South Korea, Turkey, Italy, Spain, France, Austria, Germany and Finland.