(19)

(11)

EP 2 611 892 A2

(12)

(88) Date of publication A3: 21.06.2012 (43) Date of publication: 10.07.2013 Bulletin 2013/28 (21) Application number: 11822341.1 (22) Date of filing: 16.08.2011

(51) International Patent Classification (IPC):  C10M 129/72(2006.01) C10L 1/188(2006.01) C10N 30/12(2006.01) C10M 133/44(2006.01) C10L 1/232(2006.01) (86) International application number: PCT/US2011/047928 (87) International publication number: WO 2012/030524 (08.03.2012 Gazette 2012/10)

(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: 01.09.2010 US 873475 (71) Applicant: Baker Hughes Incorporated Houston, TX 77210 (US)	(72) Inventors: YANG, Jianzhong Missouri City TX 77459 (US) BIGGERSTAFF, Paul, J. Stafford TX 77477 (US) WEERS, Jerry, J. Richmond TX 77406 (US) (74) Representative: Hoffmann, Benjamin  Dehns St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)