Aban Offshore Limited (AOL) was established in 1986 by M.A. Abraham, India's largest offshore drilling contractor in the private sector and ISO 9001:2000 accredited company offering world-class drilling and oil field services for offshore exploration and production of hydrocarbons to the oil industry in India and abroad. AOL currently possesses twenty offshore drilling and production units, it owns and operates several offshore drilling rigs, drill ships, and a floating production facility, 'Tahara'. The services offered by the company are Exploratory Services, Drilling Services, Production of hydrocarbons and Manning and management. AOL launched its first contract drilling service to the ONGC in the year 1987 with two moder