(19)

(11)

EP 2 707 569 A1

(12)

(43) Date of publication: 19.03.2014 Bulletin 2014/12 (21) Application number: 12783002.4 (22) Date of filing: 09.05.2012

(51) International Patent Classification (IPC):  E21B 33/12(2006.01) E21B 34/08(2006.01) E21B 23/03(2006.01) (86) International application number: PCT/NO2012/050084 (87) International publication number: WO 2012/154058 (15.11.2012 Gazette 2012/46)

(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: 12.05.2011 NO 20110709 (71) Applicant: WTW Solutions AS 4017 Stavanger (NO)	(72) Inventor: TINNEN, Bård, Martin N-4017 Stavanger (NO) (74) Representative: Håmsø Patentbyrå ANS  Postboks 171 4302 Sandnes 4302 Sandnes (NO)