(19)

(11)

EP 2 715 061 A1

(12)

(43) Date of publication: 09.04.2014 Bulletin 2014/15 (21) Application number: 12724623.9 (22) Date of filing: 30.05.2012

(51) International Patent Classification (IPC):  E21B 43/26(2006.01) E21B 43/114(2006.01) (86) International application number: PCT/EP2012/060146 (87) International publication number: WO 2012/163967 (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: 31.05.2011 EP 11168240 23.06.2011 EP 11171170 (71) Applicant: Welltec A/S 3450 Allerød (DK)	(72) Inventors: HALLUNDBÆK, Jørgen DK-3230 Græsted (DK) MANGAL, Lars DK-2900 Hellerup (DK) (74) Representative: Hoffmann Dragsted A/S  Rådhuspladsen 16 1550 Copenhagen V 1550 Copenhagen V (DK)