(19)

(11)

EP 2 761 128 A1

(12)

(43) Date of publication: 06.08.2014 Bulletin 2014/32 (21) Application number: 12762624.0 (22) Date of filing: 27.09.2012

(51) International Patent Classification (IPC):  E21B 43/112(2006.01) (86) International application number: PCT/EP2012/069084 (87) International publication number: WO 2013/045550 (04.04.2013 Gazette 2013/14)

(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: 30.09.2011 EP 11183494 (71) Applicant: Welltec A/S 3450 Allerød (DK)	(72) Inventors: HALLUNDBÆK, Jørgen DK-3230 Græsted (DK) SOMMER, Rasmus DK-2500 Valby (DK) (74) Representative: Hoffmann Dragsted A/S  Rådhuspladsen 16 1550 Copenhagen V 1550 Copenhagen V (DK)