(19)

(11)

EP 2 804 924 A2

(12)

(88) Date of publication A3: 07.11.2013 (43) Date of publication: 26.11.2014 Bulletin 2014/48 (21) Application number: 13701530.1 (22) Date of filing: 11.01.2013

(51) International Patent Classification (IPC):  C09K 8/68(2006.01) C09K 8/88(2006.01) C09K 8/90(2006.01) (86) International application number: PCT/US2013/021133 (87) International publication number: WO 2013/109468 (25.07.2013 Gazette 2013/30)

(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: 16.01.2012 US 201213351137 (71) Applicant: Baker Hughes Incorporated Houston, TX 77019 (US)	(72) Inventor: ARMSTRONG, Charles David Tomball, TX 77377 (US) (74) Representative: Hoffmann, Benjamin  Dehns St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)