(19)

(11)

EP 4 739 986 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24743266.9 (22) Date of filing: 05.07.2024

(51) International Patent Classification (IPC):  G01L 1/12(2006.01) G01N 27/82(2006.01) G01M 5/00(2006.01) (52) Cooperative Patent Classification (CPC): G01N 27/82; G01L 1/12; G01M 5/0025; G01M 5/0058; G01M 5/0091 (86) International application number: PCT/EP2024/025202 (87) International publication number: WO 2025/011776 (16.01.2025 Gazette 2025/03)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 07.07.2023 GB 202310492 (71) Applicant: Baker Hughes Energy Technology UK Limited Bristol BS48 1BS (GB)	(72) Inventor: BUTTLE, David John Newcastle upon Tyne Tyne and Wear NE6 3PF (GB) (74) Representative: HGF  HGF Limited 4th Floor, 1 City Square Leeds LS1 2ES Leeds LS1 2ES (GB)