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EP 2 179 002 A1

(12)

(43) Date of publication: 28.04.2010 Bulletin 2010/17 (21) Application number: 08776139.1 (22) Date of filing: 05.08.2008

(51) International Patent Classification (IPC):  C09K 8/50(2006.01) C09K 8/62(2006.01) C09K 8/03(2006.01) C09K 8/68(2006.01) (86) International application number: PCT/GB2008/002668 (87) International publication number: WO 2009/019471 (12.02.2009 Gazette 2009/07)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 08.08.2007 US 835847 08.08.2007 US 835871 (71) Applicant: Halliburton Energy Services, Inc. Duncan, OK 73533 (US)	(72) Inventors: RAVI, Krishna, M. Kingwood, TX 77325 (US) LENDE, Gunnar N-4050 Sola (NO) (74) Representative: Turner, Craig Robert  A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)