(19)

(11)

EP 2 630 332 A1

(12)

(43) Date of publication: 28.08.2013 Bulletin 2013/35 (21) Application number: 11838291.0 (22) Date of filing: 21.10.2011

(51) International Patent Classification (IPC):  E21B 47/18(2012.01) E21B 23/04(2006.01) E21B 47/12(2012.01) (86) International application number: PCT/NO2011/000301 (87) International publication number: WO 2012/060713 (10.05.2012 Gazette 2012/19)

(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: 21.10.2010 NO 20101487 (71) Applicant: TCO AS 5888 Bergen (NO)	(72) Inventor: BRANDSDAL, Viggo N-5265 Ytre Arna (NO) (74) Representative: Acapo AS  P.O. Box 1880 Nordnes NO-5817 Bergen NO-5817 Bergen (NO)