(19)

(11)

EP 3 601 714 A1

(12)

(43) Date of publication: 05.02.2020 Bulletin 2020/06 (21) Application number: 18716452.0 (22) Date of filing: 20.03.2018

(51) International Patent Classification (IPC):  E21B 17/042(2006.01) F16L 15/00(2006.01) C22C 9/06(2006.01) (86) International application number: PCT/US2018/023385 (87) International publication number: WO 2018/175456 (27.09.2018 Gazette 2018/39)

(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: KH MA MD TN (30) Priority: 20.03.2017 US 201762473792 P (71) Applicant: Materion Corporation Mayfield Heights, OH 44124 (US)	(72) Inventors: NIELSEN JR., William D. Mayfield Heights, Ohio 44124 (US) NIELSEN, Diane M. Mayfield Heights, Ohio 44124 (US) (74) Representative: Kador & Partner PartG mbB  Corneliusstraße 15 80469 München 80469 München (DE)