(19)

(11)

EP 2 414 629 A1

(12)

(43) Date of publication: 08.02.2012 Bulletin 2012/06 (21) Application number: 10759325.3 (22) Date of filing: 31.03.2010

(51) International Patent Classification (IPC):  E21B 47/024(2006.01) (86) International application number: PCT/US2010/029328 (87) International publication number: WO 2010/114872 (07.10.2010 Gazette 2010/40)

(84) Designated Contracting States: 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 SE SI SK SM TR (30) Priority: 03.04.2009 US 166443 P (71) Applicant: VECTOR MAGNETICS LLC Ithaca, NY 14850 (US)	(72) Inventor: KUCKES, Arthur Ithaca New York 14850 (US) (74) Representative: Manley, Nicholas Michael  W.P. Thompson & Co. Coopers Building Church Street Liverpool L1 3AB Liverpool L1 3AB (GB)