ONGC deadline for 600-metre rig Vol 13, PW 24 (20 May 10) News in Brief ONGC is demanding confirmations by Thursday, May 20 (today) in its tender to hire a semi-submersible that can drill in 600-metre water depths for three years from December 2010.... Buy this article forRs590 $9For a 30-article or annual subscription rates click here Data not available in ...