(19)

(11)

EP 2 737 167 A1

(12)

(43) Date of publication: 04.06.2014 Bulletin 2014/23 (21) Application number: 12792178.1 (22) Date of filing: 22.05.2012

(51) International Patent Classification (IPC):  E21B 33/13(2006.01) E21B 34/06(2006.01) E21B 33/138(2006.01) (86) International application number: PCT/CA2012/000487 (87) International publication number: WO 2012/162792 (06.12.2012 Gazette 2012/49)

(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: 30.05.2011 US 201161491302 P 20.07.2011 US 201161509763 P (71) Applicant: Packers Plus Energy Services Inc. Calgary, Alberta T2P 2V7 (CA)	(72) Inventors: KENYON, Michael Calgary, Alberta T2J 4B3 (CA) THEMIG, Daniel Jon Calgary, Alberta T2W 5P9 (CA) (74) Representative: Mannion, Daniel James et al Stevens Hewlett & Perkins 1 Pemberton Row London EC4A 3BG London EC4A 3BG (GB)