(19)

(11)

EP 4 824 382 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 23825277.9 (22) Date of filing: 12.12.2023

(51) International Patent Classification (IPC):  E21B 1/30(2006.01) E21B 7/02(2006.01) E21B 6/00(2006.01) E21B 45/00(2006.01) (52) Cooperative Patent Classification (CPC): E21B 45/00; E21B 1/30; E21B 6/00; E21B 7/022 (86) International application number: PCT/SE2023/051246 (87) International publication number: WO 2025/127973 (19.06.2025 Gazette 2025/25)

(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: KH MA MD TN (71) Applicant: Epiroc Rock Drills Aktiebolag 701 91 Örebro (SE)	(72) Inventors: ADOLFSSON, Thomas 701 91 Örebro (SE) EIDERBRANT, Tobias 701 91 Örebro (SE) DAHL, Robert 701 91 Örebro (SE) (74) Representative: Epiroc Rock Drills AB  Patents 701 91 Örebro 701 91 Örebro (SE)