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(11)

EP 3 332 082 A1

(12)

(43) Date of publication: 13.06.2018 Bulletin 2018/24 (21) Application number: 15747846.2 (22) Date of filing: 30.03.2015

(51) International Patent Classification (IPC):  E21B 19/00(2006.01) E21B 19/15(2006.01) (86) International application number: PCT/IT2015/000085 (87) International publication number: WO 2016/157222 (06.10.2016 Gazette 2016/40)

(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 Designated Validation States: MA (71) Applicant: THS S.R.L. I-48121 Ravenna (IT)	(72) Inventor: SPADONI, Luciano I-48012 Bagnacavallo (IT) (74) Representative: Haseltine Lake LLP  Lincoln House, 5th Floor 300 High Holborn London WC1V 7JH London WC1V 7JH (GB)