(19)

(11)

EP 2 758 488 A1

(12)

(43) Date of publication: 30.07.2014 Bulletin 2014/31 (21) Application number: 12731854.1 (22) Date of filing: 20.06.2012

(51) International Patent Classification (IPC):  C09K 8/68(2006.01) C09K 8/70(2006.01) C09K 8/72(2006.01) (86) International application number: PCT/US2012/043308 (87) International publication number: WO 2013/043243 (28.03.2013 Gazette 2013/13)

(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: 19.09.2011 US 201113236378 (71) Applicant: Baker Hughes Incorporated Houston, TX 77019 (US)	(72) Inventors: CARMAN, Paul S. Spring, Texas 77379 (US) GUPTA, D.V. Satyanarayana The Woodlands, Texas 77382 (US) (74) Representative: Hoffmann, Benjamin  Dehns St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)