(19)

(11)

EP 2 737 173 A2

(12)

(88) Date of publication A3: 27.06.2013 (43) Date of publication: 04.06.2014 Bulletin 2014/23 (21) Application number: 12726981.9 (22) Date of filing: 26.05.2012

(51) International Patent Classification (IPC):  E21B 47/135(2012.01) (86) International application number: PCT/US2012/039767 (87) International publication number: WO 2012/166677 (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 (30) Priority: 30.05.2011 HU P1100276 (71) Applicant: SLD Enhanced Recovery, Inc. Houston, TX 77069 (US)	(72) Inventors: BOZSO, Tamas H-11 2. EM. 25 Halasi Ut (HU) BOZSO, Robert H-22 Ovoda U. (HU) (74) Representative: Manley, Nicholas Michael  WP Thompson Coopers Building Church Street Liverpool L1 3AB Liverpool L1 3AB (GB)