(19)

(11)

EP 2 294 279 A1

(12)

(43) Date of publication: 16.03.2011 Bulletin 2011/11 (21) Application number: 09737604.0 (22) Date of filing: 29.04.2009

(51) International Patent Classification (IPC):  E21B 34/14(2006.01) E21B 34/10(2006.01) E21B 33/126(2006.01) (86) International application number: PCT/CA2009/000599 (87) International publication number: WO 2009/132462 (05.11.2009 Gazette 2009/45)

(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 TR Designated Extension States: AL BA RS (30) Priority: 29.04.2008 US 48797 16.03.2009 US 405185 (71) Applicant: Packers Plus Energy Services Inc. Calgary, Alberta T2P 2Y3 (CA)	(72) Inventors: THEMIG, Daniel Jon Calgaray, Alberta T2W5P9 (CA) TRAHAN, Kevin O. The Woodlands Texas 77382 (US) DESRANLEAU, Christopher Denis Sherwood Park, Alberta T8A 3A5 (CA) (74) Representative: Perkins, Sarah et al Stevens Hewlett & Perkins 1, Pemberton Row London EC4A 3BG London EC4A 3BG (GB)