(19)

(11)

EP 2 329 109 A2

(12)

(88) Date of publication A3: 24.02.2011 (43) Date of publication: 08.06.2011 Bulletin 2011/23 (21) Application number: 09784531.7 (22) Date of filing: 10.02.2009

(51) International Patent Classification (IPC):  E21B 43/25(2006.01) E21B 33/127(2006.01) E21B 43/114(2006.01) E21B 23/01(2006.01) (86) International application number: PCT/GB2009/000375 (87) International publication number: WO 2010/037993 (08.04.2010 Gazette 2010/14)

(84) Designated Contracting States: 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 TR Designated Extension States: AL BA RS (30) Priority: 02.10.2008 US 244547 (71) Applicant: Halliburton Energy Services, Inc. Duncan, OK 73533 (US)	(72) Inventors: SURJAATMADJA, Jim, B. Duncan OK 73533 (US) McDANIEL, Billy, W. Duncan OK 73533 (US) EAST, Loyd, E. Houston, TX 77072 (US) (74) Representative: Curtis, Philip Anthony  A.A Thornton & Co Chemical 235 High Holborn London, Greater London WC1V 7LE London, Greater London WC1V 7LE (GB)