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(11)

EP 2 976 407 A1

(12)

(43) Date of publication: 27.01.2016 Bulletin 2016/04 (21) Application number: 13878799.9 (22) Date of filing: 22.03.2013

(51) International Patent Classification (IPC):  C09K 8/34(2006.01) E21B 43/22(2006.01) B01J 19/06(2006.01) E21B 43/26(2006.01) (86) International application number: PCT/CA2013/050238 (87) International publication number: WO 2014/146191 (25.09.2014 Gazette 2014/39)

(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 Designated Extension States: BA ME (71) Applicant: Synoil Fluids Holdings Inc. Calgary, Alberta T2P 3R7 (CA)	(72) Inventors: MESHER, Shaun T. Calgary, Alberta T2P 3C4 (CA) STEWARD, Olivia Frome Somerset BA11 2LX (GB) FIRTH, Daniel St Andrews Fife KY16 8RR (GB) MORAN, Robert St. Helens Merseyside WA10 3RS (GB) (74) Representative: Rankin, Douglas  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)