(19)

(11)

EP 2 635 771 A1

(12)

(43) Date of publication: 11.09.2013 Bulletin 2013/37 (21) Application number: 11820599.6 (22) Date of filing: 24.08.2011

(51) International Patent Classification (IPC):  E21B 47/10(2012.01) (86) International application number: PCT/US2011/048974 (87) International publication number: WO 2012/027476 (01.03.2012 Gazette 2012/09)

(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: 24.08.2010 US 376326 P (71) Applicant: Hale, Stanley Kennesaw, GA 30144 (US)	(72) Inventor: Hale, Stanley Kennesaw, GA 30144 (US) (74) Representative: Müllejans, Inge  Murgitroyd & Company Scotland House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)