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EP 1 929 072 A1

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(43) Date of publication: 11.06.2008 Bulletin 2008/24 (21) Application number: 06779466.9 (22) Date of filing: 18.09.2006

(51) International Patent Classification (IPC):  C23F 11/04(2006.01) C23F 11/18(2006.01) E21B 41/02(2006.01) C23F 11/08(2006.01) C23F 11/10(2006.01) (86) International application number: PCT/GB2006/003454 (87) International publication number: WO 2007/034155 (29.03.2007 Gazette 2007/13)

(84) Designated Contracting States: DE DK FR GB IT NL (30) Priority: 26.09.2005 US 235397 26.09.2005 US 234997 (71) Applicant: Halliburton Energy Services, Inc. Duncan, OK 73533 (US)	(72) Inventors: CASSIDY, Juanita, M. Duncan, OK 73533 (US) KISER, Chad, E. Comanche OK 73529 (US) LANE, Jim, L. Duncan, OK 73533 (US) FROST, Keith, A. Duncan, OK 73533 (US) (74) Representative: Curtis, Philip Anthony et al A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)