(19)

(11)

EP 2 809 879 A2

(12)

(88) Date of publication A3: 19.09.2013 (43) Date of publication: 10.12.2014 Bulletin 2014/50 (21) Application number: 13706123.0 (22) Date of filing: 04.02.2013

(51) International Patent Classification (IPC):  E21B 47/12(2012.01) E21B 19/14(2006.01) E21B 17/02(2006.01) E21B 19/16(2006.01) (86) International application number: PCT/US2013/024610 (87) International publication number: WO 2013/116826 (08.08.2013 Gazette 2013/32)

(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 Designated Extension States: BA ME (30) Priority: 03.02.2012 US 201261594719 P 17.08.2012 US 201261684559 P (71) Applicants: Intelliserv International Holding, Ltd George Town, Grand Cayman (KY) Zaleski, Theodore E. Jr. Spring, Texas 77379-6479 (US) Drzewiecki, Lopek Edmonton, Alberta T5M 3C2 (CA)

(72) Inventors: ZALESKI, Theodore E. Jr. Spring, Texas 77379-6479 (US) DRZEWIECKI, Lopek Edmonton, Alberta T5M 3C2 (CA) (74) Representative: Beck Greener  Fulwood House 12 Fulwood Place London WC1V 6HR London WC1V 6HR (GB)