New Vantage rig quote extension Vol 12, PW 15 (18 Dec 08) News in Brief Houston-based driller Vantage Energy has extended for a second time the validity of its deepwater rig quote to an ONGC tender by four days until December 19, and cut the price.... Buy this article forRs590 $9For a 30-article or annual subscription rates click here Data not available in ...