Tapas Kumar Sengupta

Pawan Hans Ltd. provides helicopter flight and training services. It offers helicopter support services to the oil sector for its off-shore exploration operations, services in remote, hilly areas and charter services for promotion of tourism. The firm services include charter, Pawan Hans helicopter training institute, clientele, commercial, passenger, MRO services. The company was founded in 1985 and is headquartered in Noida, India.

ONGC Videsh Ltd. explores, develops, and produces oil and gas. It owns and operates oil and gas acreages outside India. The company was founded on March 5, 1965 and is headquartered in New Delhi, India.

Greater Nile Petroleum Operating Co. Ltd. explores for and mines for oil and gas in an unspecified location. The Sudanese company is ultimately controlled by the Government of China.

ONGC Petro additions Ltd. engages in the development of a petrochemical plant. It provides organic, inorganic, synthetic chemicals and chemical compounds, petrochemicals, polymers, resins, solvents, derivatives, by-products, co-products, alkalis, and acids and gases, obtained from crude oil, natural gas, and petroleum products. The company was founded in 2006 and is headquartered in Vadodara, India.