(19)

(11)

EP 2 513 417 A1

(12)

(43) Date of publication: 24.10.2012 Bulletin 2012/43 (21) Application number: 10836870.5 (22) Date of filing: 26.10.2010

(51) International Patent Classification (IPC):  E21B 34/10(2006.01) E21B 34/14(2006.01) E21B 43/14(2006.01) E21B 33/124(2006.01) E21B 43/12(2006.01) (86) International application number: PCT/CA2010/001716 (87) International publication number: WO 2011/072367 (23.06.2011 Gazette 2011/25)

(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 (30) Priority: 16.12.2009 US 287150 P (71) Applicant: Packers Plus Energy Services Inc. Calgary, Alberta T2P 2V7 (CA)	(72) Inventors: DESRANLEAU, Christopher , Denis Sherwood Park Alberta T8A 3A5 (CA) THEMIG, Daniel Jon Calgary Alberta T2W 5P9 (CA) DELUCIA, Frank Houston Texas 77070 (US) (74) Representative: Perkins, Sarah et al Stevens Hewlett & Perkins 1, Pemberton Row London EC4A 3BG London EC4A 3BG (GB)