(19)

(11)

EP 2 635 760 A1

(12)

(43) Date of publication: 11.09.2013 Bulletin 2013/37 (21) Application number: 10859323.7 (22) Date of filing: 04.11.2010

(51) International Patent Classification (IPC):  E21B 7/02(2006.01) E21B 33/03(2006.01) E21B 7/04(2006.01) E21B 15/00(2006.01) (86) International application number: PCT/NO2010/000401 (87) International publication number: WO 2012/060711 (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 (71) Applicant: Georigg AS 4440 Tonstad (NO)	(72) Inventor: HAUGHOM, Per Olav N-4440 Tonstad (NO) (74) Representative: Risdal, Jørgen  Håmsø Patentbyrå ANS Vågsgaten 43 4301 Sandnes 4301 Sandnes (NO)