(19)

(11)

EP 2 929 131 A1

(12)

(43) Date of publication: 14.10.2015 Bulletin 2015/42 (21) Application number: 13802599.4 (22) Date of filing: 06.12.2013

(51) International Patent Classification (IPC):  E21B 41/00(2006.01) E21B 23/14(2006.01) (86) International application number: PCT/EP2013/075774 (87) International publication number: WO 2014/086963 (12.06.2014 Gazette 2014/24)

(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: 07.12.2012 EP 12196097 (71) Applicant: Welltec A/S 3450 Allerød (DK)	(72) Inventors: HALLUNDBÆK, Jørgen DK-3230 Græsted (DK) ANDERSEN, Tomas Sune DK-3000 Helsingør (DK) MANGAL, Lars DK-2900 Hellerup (DK) (74) Representative: Hoffmann Dragsted A/S  Rådhuspladsen 16 1550 Copenhagen V 1550 Copenhagen V (DK)