India’s state-run oil and gas company, ONGC is planning on buying 27 drilling rigs that would cost Rs 3,000-3,500 crore. The new purchase has been planned to replace nearly half of its ageing onland rigs. ONGC has floated a tender for the same in search of interested suppliers. The new rigs will replace some of the ageing fleet of 67 rigs currently operating at the company’s offshore fields.