Siberia rigs spark OVL row with ONGC in Delhi Vol 16, PW 1 (26 Jul 12) Exploration & Production Three 1500-hp Chinese-built rigs owned by OVL-subsidiary Imperial Energy are gathering icicles in freezing Siberia... Buy this article forRs590 $9 For a 30-article or annual subscription rates click here RelatedOVL wants two rigs for 7 wells in Colombia (11 Feb 21) Twenty-three apply for VP Mahawar's job (19 Oct 17) Imperial says 'frakking' will revive its fortunes (01 Nov 12) DK Sarraf cuddles up to new Russian oil minister (23 Aug 12) Siberia rigs spark OVL row with ONGC in Delhi (26 Jul 12) Pandey is Vasudeva's hope to revive Imperial (14 Jun 12) OVL turns to Exxon to unlock Siberia's tight oil (03 May 12) Siberian ghosts return to haunt RS Butola (10 Feb 11) Life in the ice age for OVL in western Siberia (09 Sep 10) Central Asian markets beckon for driller John Energy (17 Apr 08)