(19)

(11)

EP 3 036 395 A2

(12)

(88) Date of publication A3: 19.11.2015 (43) Date of publication: 29.06.2016 Bulletin 2016/26 (21) Application number: 14755724.3 (22) Date of filing: 04.08.2014

(51) International Patent Classification (IPC):  E21B 33/126(2006.01) E21B 37/00(2006.01) E21B 33/134(2006.01) E21B 33/13(2006.01) E21B 43/116(2006.01) (86) International application number: PCT/NO2014/050136 (87) International publication number: WO 2015/026239 (26.02.2015 Gazette 2015/08)

(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: 21.08.2013 NO 20131131 21.08.2013 US 201313972419 (71) Applicant: Archer Oil Tools AS 4033 Stavanger (NO)	(72) Inventor: BAKKEN, Sverre N-4011 Stavanger (NO) (74) Representative: Fluges patent as  Pb. 27 1629 Gamle Fredrikstad 1629 Gamle Fredrikstad (NO)