(19)

(11)

EP 2 764 207 A1

(12)

(43) Date of publication: 13.08.2014 Bulletin 2014/33 (21) Application number: 12840795.4 (22) Date of filing: 09.10.2012

(51) International Patent Classification (IPC):  E21B 47/01(2012.01) E21B 21/08(2006.01) E21B 47/008(2012.01) (86) International application number: PCT/US2012/059402 (87) International publication number: WO 2013/055706 (18.04.2013 Gazette 2013/16)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 09.10.2011 US 201161545188 P (71) Applicant: Intelliserv LLC Houston, Texas 77036 (US)	(72) Inventor: VEENINGEN, Daniel Marco Houston Texas 77253-3267 (US) (74) Representative: Beck Greener  Fulwood House 12 Fulwood Place London WC1V 6HR London WC1V 6HR (GB)