(19)

(11)

EP 2 670 815 A1

(12)

(43) Date of publication: 11.12.2013 Bulletin 2013/50 (21) Application number: 12704885.8 (22) Date of filing: 30.01.2012

(51) International Patent Classification (IPC):  C09K 8/70(2006.01) C09K 8/88(2006.01) C09K 8/80(2006.01) (86) International application number: PCT/GB2012/000097 (87) International publication number: WO 2012/104582 (09.08.2012 Gazette 2012/32)

(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: 31.01.2011 US 201113017611 31.01.2011 US 201113017856 31.01.2011 US 201113017745 (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77072 (US)	(72) Inventors: TODD, Bradley Leon Duncan, Oklahoma 73533 (US) WELTON, Thomas D Duncan, Oklahoma 73533 (US) (74) Representative: Turner, Craig Robert  A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)