(19)

(11)

EP 2 702 240 A1

(12)

(43) Date of publication: 05.03.2014 Bulletin 2014/10 (21) Application number: 12717715.2 (22) Date of filing: 27.04.2012

(51) International Patent Classification (IPC):  E21B 37/00(2006.01) E21B 23/03(2006.01) E21B 41/00(2006.01) (86) International application number: PCT/EP2012/057789 (87) International publication number: WO 2012/146725 (01.11.2012 Gazette 2012/44)

(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: 28.04.2011 EP 11164021 (71) Applicant: Welltec A/S 3450 Allerød (DK)	(72) Inventors: HALLUNDBÆK, Jørgen DK-3230 Græsted (DK) HALVORSEN, Helge N-4085 Hundvåg (NO) (74) Representative: Hoffmann Dragsted A/S  Rådhuspladsen 16 1550 Copenhagen V 1550 Copenhagen V (DK)