(19)

(11)

EP 2 649 273 A1

(12)

(43) Date of publication: 16.10.2013 Bulletin 2013/42 (21) Application number: 11804518.6 (22) Date of filing: 09.12.2011

(51) International Patent Classification (IPC):  E21B 47/12(2012.01) E21B 47/14(2006.01) (86) International application number: PCT/EP2011/072300 (87) International publication number: WO 2012/076682 (14.06.2012 Gazette 2012/24)

(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 (30) Priority: 10.12.2010 EP 10194466 (71) Applicant: Welltec A/S 3450 Allerød (DK)	(72) Inventor: HALLUNDBÆK, Jørgen DK-3230 Græsted (DK) (74) Representative: Hoffmann Dragsted A/S  Rådhuspladsen 16 1550 Copenhagen V 1550 Copenhagen V (DK)