(19)

(11)

EP 2 596 199 A2

(12)

(88) Date of publication A3: 04.10.2012 (43) Date of publication: 29.05.2013 Bulletin 2013/22 (21) Application number: 11735961.2 (22) Date of filing: 19.07.2011

(51) International Patent Classification (IPC):  E21B 10/32(2006.01) (86) International application number: PCT/US2011/044490 (87) International publication number: WO 2012/012392 (26.01.2012 Gazette 2012/04)

(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: 19.07.2011 NZ 58688311 19.07.2010 NZ 58688310 (71) Applicant: Illinois Tool Works, Inc. Glenview, IL 60026 (US)	(72) Inventor: GILMOUR, Roydon John Greenhithe Auckland 0632 (NZ) (74) Representative: Meissner, Bolte & Partner  Depotstrasse 5 1/2 86199 Augsburg 86199 Augsburg (DE)