(19)

(11)

EP 2 564 067 A1

(12)

(43) Date of publication: 06.03.2013 Bulletin 2013/10 (21) Application number: 11774254.4 (22) Date of filing: 29.04.2011

(51) International Patent Classification (IPC):  F04B 47/02(2006.01) E21B 17/042(2006.01) F04B 47/12(2006.01) E21B 17/03(2006.01) E21B 43/12(2006.01) (86) International application number: PCT/CA2011/050259 (87) International publication number: WO 2011/134085 (03.11.2011 Gazette 2011/44)

(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 (30) Priority: 30.04.2010 US 330095 P (71) Applicant: Oil Lift Technology Inc. Calgary, Alberta T2E 8Z9 (CA)	(72) Inventors: HULT, Vern, A. Calgary Alberta T2S 1J4 (CA) WIDNEY, Mark Ardrossan Alberta T8E 2K6 (CA) (74) Representative: Tindall, Adam  Appleyard Lees 15 Clare Road Halifax, Yorkshire HX1 2HY Halifax, Yorkshire HX1 2HY (GB)