(19)

(11)

EP 2 923 032 A1

(12)

(43) Date of publication: 30.09.2015 Bulletin 2015/40 (21) Application number: 13857554.3 (22) Date of filing: 08.11.2013

(51) International Patent Classification (IPC):  E21B 29/08(2006.01) E21B 29/06(2006.01) (86) International application number: PCT/US2013/069160 (87) International publication number: WO 2014/081583 (30.05.2014 Gazette 2014/22)

(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: 20.11.2012 US 201213681673 (71) Applicant: Baker Hughes Incorporated Houston, TX 77210-4740 (US)	(72) Inventor: FUHST, Karsten 31180 Giesen (DE) (74) Representative: Mabey, Katherine Frances  Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)