(19)

(11)

EP 2 480 747 A2

(12)

(88) Date of publication A3: 23.06.2011 (43) Date of publication: 01.08.2012 Bulletin 2012/31 (21) Application number: 10819558.7 (22) Date of filing: 24.09.2010

(51) International Patent Classification (IPC):  E21B 10/56(2006.01) E21B 10/46(2006.01) E21B 10/567(2006.01) (86) International application number: PCT/US2010/050252 (87) International publication number: WO 2011/038263 (31.03.2011 Gazette 2011/13)

(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: 25.09.2009 US 245844 P (71) Applicants: Baker Hughes Incorporated Houston, TX 77019-2118 (US) Element Six (Production) (Pty) Ltd 1559 Gauteng (ZA) Element Six Limited County Clare (IE)	(72) Inventors: DiGIOVANNI, Anthony, A. Houston Texas 77002 (US) LYONS, Nicholas, J. Houston Texas 77009 (US) MOROZOV, Konstantin, E. The Woodlands Texas 77384 (US) LIVERSAGE, John, H. Gauteng (ZA) SCOTT, Danny, E. Montgomery Texas 77356 (US) (74) Representative: Chiva, Andrew Peter  Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)