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EP 3 803 044 A1

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(43) Date of publication: 14.04.2021 Bulletin 2021/15 (21) Application number: 19815478.3 (22) Date of filing: 22.05.2019

(51) International Patent Classification (IPC):  E21B 41/00(2006.01) E21B 33/06(2006.01) E21B 21/08(2006.01) E21B 43/12(2006.01) E04H 14/00(2006.01) E21B 44/00(2006.01) E21B 19/14(2006.01) E21B 7/02(2006.01) E21B 19/20(2006.01) G06Q 50/02(2012.01) (86) International application number: PCT/US2019/033427 (87) International publication number: WO 2019/236288 (12.12.2019 Gazette 2019/50)

(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: 04.06.2018 US 201815997414 (71) Applicants: Services Pétroliers Schlumberger 75007 Paris (FR) FR  Schlumberger Technology B.V. 2514 JG The Hague (NL) AL AT BE BG CH CY CZ DE DK EE ES FI 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

(72) Inventor: JORUD, Anstein 4623 Kristiansand (NO) (74) Representative: Schlumberger Intellectual Property Department  Parkstraat 83 2514 JG Den Haag 2514 JG Den Haag (NL)