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(11)

EP 2 971 474 A1

(12)

(43) Date of publication: 20.01.2016 Bulletin 2016/03 (21) Application number: 14712225.3 (22) Date of filing: 11.03.2014

(51) International Patent Classification (IPC):  E21B 34/14(2006.01) E21B 47/022(2012.01) G01N 27/00(2006.01) E21B 33/127(2006.01) E21B 47/09(2012.01) (86) International application number: PCT/EP2014/054647 (87) International publication number: WO 2014/139985 (18.09.2014 Gazette 2014/38)

(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: 11.03.2013 EP 13158649 (71) Applicant: Welltec A/S 3450 Allerød (DK)	(72) Inventors: HALLUNDBÆK, Jørgen DK-3230 Græsted (DK) VASQUES, Ricardo Reves DK-2840 Holte (DK) STÆHR, Lars DK-2600 Glostrup (DK) FRANCKE, Mathias DK-2830 Virum (DK) KUMAR, Satish DK-2700 Brønshøj (DK) MASSEY, Dean Richard Katy, TX 77450 (US) (74) Representative: Hoffmann Dragsted A/S  Rådhuspladsen 16 1550 Copenhagen V 1550 Copenhagen V (DK)