(19)

(11)

EP 3 788 234 A1

(12)

(43) Date of publication: 10.03.2021 Bulletin 2021/10 (21) Application number: 19796208.7 (22) Date of filing: 30.04.2019

(51) International Patent Classification (IPC):  E21B 43/12(2006.01) F04B 47/02(2006.01) (86) International application number: PCT/US2019/029847 (87) International publication number: WO 2019/213041 (07.11.2019 Gazette 2019/45)

(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: 01.05.2018 US 201862665039 P (71) Applicant: Cameron Technologies Limited 2514 JG The Hague (NL)	(72) Inventors: PRUITT, Jeffrey Boardman Houston, Texas 77041 (US) NETECKE, Michael Raymond Houston, Texas 77041 (US) HALMARI, Jaakko Jalmari Houston, Texas 77041 (US) CLARKE, Sean M. Houston, Texas 77041 (US) TRAN, Ban Q. Houston, Texas 77041 (US) (74) Representative: Schlumberger Intellectual Property Department  Parkstraat 83 2514 JG Den Haag 2514 JG Den Haag (NL)