Essar wants ONGC out of Mehsana block Vol 16, PW 12 (10 Jan 13) Exploration & Production Ruia-controlled Essar Oil (70%) is tired of arguing with partner ONGC (30%) over developing the 143.5-sq km north Gujarat... Buy this article forRs590 $9For a 30-article or annual subscription rates click here Data not available in ...