Essar legal challenge over ONGC rig tender Vol 14, PW 6 (09 Sep 10) Exploration & Production Frustrated ONGC must be cursing the day it floated a much-disputed semisubmersible tender, where Essar Oilfield Services and Transocean submitted almost identical bids.... Buy this article forRs590 $9For a 30-article or annual subscription rates click here Data not available in ...