India's Cairn Oil & Gas has contracted a rig for a multi-well offshore drilling campaign at its Ravva oil and gas field off the country's east coast, writes Russell Searancke.

Drilling is expected to start in the fourth quarter this year, according to Cairn's parent company Vedanta, which said in previous guidance that the drilling programme has an estimated capital cost of $185 million and is targeting resources of between 50 million and 100 million barrels of oil equivalent.