(19)

(11)

EP 2 756 163 A1

(12)

(43) Date of publication: 23.07.2014 Bulletin 2014/30 (21) Application number: 12831984.5 (22) Date of filing: 05.09.2012

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) E21B 34/16(2006.01) E21B 43/26(2006.01) E21B 34/08(2006.01) E21B 43/22(2006.01) (86) International application number: PCT/CA2012/050612 (87) International publication number: WO 2013/037055 (21.03.2013 Gazette 2013/12)

(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: 12.09.2011 US 201161533660 P (71) Applicant: Packers Plus Energy Services Inc. Calgary, Alberta T2P 2V7 (CA)	(72) Inventor: COON, Robert, Joe Missouri City, Texas 77459 (US) (74) Representative: Vinsome, Rex Martin  Urquhart-Dykes & Lord LLP 12th Floor Cale Cross House 156 Pilgrim Street Newcastle-upon-Tyne NE1 6SU Newcastle-upon-Tyne NE1 6SU (GB)