(19)

(11)

EP 2 596 076 A2

(12)

(43) Date of publication: 29.05.2013 Bulletin 2013/22 (21) Application number: 11740701.5 (22) Date of filing: 22.07.2011

(51) International Patent Classification (IPC):  C09K 8/68(2006.01) (86) International application number: PCT/GB2011/001112 (87) International publication number: WO 2012/010853 (26.01.2012 Gazette 2012/04)

(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 (30) Priority: 22.07.2010 US 841543 (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77072 (US)	(72) Inventors: BRYANT, Jason, E. Duncan OK 73533 (US) HAGGSTROM, Johanna, A. Duncan OK 73533 (US) (74) Representative: Cottrill, Emily Elizabeth Helen  A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)