(19)

(11)

EP 4 334 677 A1

(12)

(43) Date of publication: 13.03.2024 Bulletin 2024/11 (21) Application number: 22719358.8 (22) Date of filing: 13.04.2022

(51) International Patent Classification (IPC):  G01C 9/02(2006.01) E21B 47/00(2012.01) E02D 1/00(2006.01) (52) Cooperative Patent Classification (CPC): G01C 9/02 (86) International application number: PCT/IB2022/053461 (87) International publication number: WO 2022/234369 (10.11.2022 Gazette 2022/45)

(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: 03.05.2021 IT 202100011177 (71) Applicant: Sisgeo S.r.l. 20060 Masate (MI) (IT)	(72) Inventors: FANZAGHI, Damiano 20060 Masate (Milano) (IT) FREDDI, Francesco 20060 Masate (Milano) (IT) POZZI, Emilio 20060 Masate (Milano) (IT) LAMPERTI, Romano Arturo Luigi 20060 Masate (Milano) (IT) BESANA, Luca 20060 Masate (Milano) (IT) (74) Representative: Tarabbia, Luigi  Bugnion S.p.A Viale Lancetti, 17 20158 Milano 20158 Milano (IT)