BP on fourth corehole at Birbhum Vol 13, PW 8 (24 Sep 09) News in Brief BP has completed drilling three coreholes at its CBM exploration block BB-CBM-2005/III CBM in the Birbhum district of West Bengal.... Buy this article forRs590 $9 For a 30-article or annual subscription rates click here RelatedBP exits CBM block after spending millions (15 Jul 10) BP weighs up CBM options in West Bengal (14 Jan 10) BP on fourth corehole at Birbhum (24 Sep 09) Oil India believed to be interested in BP Birbhum block (04 Jun 09) Mitchell to drill first BP corehole at Birbhum in March (29 Jan 09) BP mid-December CBM drilling target (18 Sep 08) BP completes public hearing for CBM block at Birbhum (21 Aug 08) After bird flu BP resumes Birbhum CBM block work (06 Mar 08) Bird flu epidemic hits BP at Birbhum (24 Jan 08) At least 2-tcf recoverable CBM gas at BB-CBM-2005/III (25 Jan 07)