(19)

(11)

EP 2 342 422 A1

(12)

(43) Date of publication: 13.07.2011 Bulletin 2011/28 (21) Application number: 09817135.8 (22) Date of filing: 30.09.2009

(51) International Patent Classification (IPC):  E21C 35/12(2006.01) E21C 41/26(2006.01) B65G 37/00(2006.01) E21C 47/04(2006.01) (86) International application number: PCT/CA2009/001367 (87) International publication number: WO 2010/037215 (08.04.2010 Gazette 2010/14)

(84) Designated Contracting States: 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 SE SI SK SM TR Designated Extension States: AL BA RS (30) Priority: 30.09.2008 CA 2640018 (71) Applicant: Suncor Energy Inc. Calgary, Alberta T2P 2V5 (CA)	(72) Inventors: DIRK, Terry Fort McMurray Alberta T9K 1V5 (CA) MACDOUGALL, Paul Frederick Fort McMurray Alberta T9H 0A3 (CA) (74) Representative: Hague, Alison Jane  Dehns St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)