(19)

(11)

EP 2 771 540 A1

(12)

(43) Date of publication: 03.09.2014 Bulletin 2014/36 (21) Application number: 12780175.1 (22) Date of filing: 26.10.2012

(51) International Patent Classification (IPC):  E21B 33/127(2006.01) E21B 33/12(2006.01) (86) International application number: PCT/EP2012/071270 (87) International publication number: WO 2013/060849 (02.05.2013 Gazette 2013/18)

(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: 28.10.2011 EP 11187092 (71) Applicant: Welltec A/S 3450 Allerød (DK)	(72) Inventors: HALLUNDBÆK, Jørgen DK-3230 Græsted (DK) HAZEL, Paul Aberdeen AB41/7JQ (GB) (74) Representative: Hoffmann Dragsted A/S  Rådhuspladsen 16 1550 Copenhagen V 1550 Copenhagen V (DK)