(19)

(11)

EP 2 951 386 A2

(12)

(88) Date of publication A3: 21.05.2015 (43) Date of publication: 09.12.2015 Bulletin 2015/50 (21) Application number: 14726193.7 (22) Date of filing: 23.01.2014

(51) International Patent Classification (IPC):  E21B 41/00(2006.01) E21B 10/60(2006.01) (86) International application number: PCT/IB2014/000641 (87) International publication number: WO 2014/118641 (07.08.2014 Gazette 2014/32)

(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: 01.02.2013 US 201361759858 P (71) Applicant: Varel Europe S.A.S. 64000 Pau (FR)	(72) Inventor: KAPLAN, Julia F-64000 Pau (FR) (74) Representative: Hunt-Grubbe, Henry  Gill Jennings & Every LLP The Broadgate Tower 20 Primrose Street London EC2A 2ES London EC2A 2ES (GB)