(19)

(11)

EP 2 723 987 A2

(12)

(88) Date of publication A3: 10.10.2013 (43) Date of publication: 30.04.2014 Bulletin 2014/18 (21) Application number: 12737622.6 (22) Date of filing: 21.06.2012

(51) International Patent Classification (IPC):  E21D 11/00(2006.01) E21D 11/30(2006.01) E21D 11/40(2006.01) E21F 16/02(2006.01) E21D 11/08(2006.01) E21D 11/38(2006.01) E21D 11/10(2006.01) (86) International application number: PCT/NO2012/050112 (87) International publication number: WO 2012/177143 (27.12.2012 Gazette 2012/52)

(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: 21.06.2011 NO 20110892 (71) Applicant: Stabinor AS 3400 Lier (NO)	(72) Inventor: DALEGÅRDEN, Torbjørn N-3400 Lier (NO) (74) Representative: Zacco Norway AS  P.O. Box 2003 Vika 0125 Oslo 0125 Oslo (NO)