(19)

(11)

EP 2 430 279 A2

(12)

(88) Date of publication A3: 03.03.2011 (43) Date of publication: 21.03.2012 Bulletin 2012/12 (21) Application number: 10775271.9 (22) Date of filing: 04.05.2010

(51) International Patent Classification (IPC):  E21B 10/54(2006.01) E21B 10/42(2006.01) E21B 10/62(2006.01) (86) International application number: PCT/US2010/033517 (87) International publication number: WO 2010/132235 (18.11.2010 Gazette 2010/46)

(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 SE SI SK SM TR (30) Priority: 13.05.2009 US 465441 (71) Applicant: Baker Hughes Incorporated Houston, TX 77210 (US)	(72) Inventor: DOVALINA, Jorge The Woodlands, TX 77380 (US) (74) Representative: Hano, Christian et al v. Füner Ebbinghaus Finck Hano Patentanwälte Mariahilfplatz 3 81541 München 81541 München (DE)