(19)

(11)

EP 4 816 662 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 23825269.6 (22) Date of filing: 01.12.2023

(51) International Patent Classification (IPC):  E21B 19/16(2006.01) E21B 19/20(2006.01) (52) Cooperative Patent Classification (CPC): E21B 19/165; E21B 19/166; E21B 19/16; E21B 19/20 (86) International application number: PCT/SE2023/051213 (87) International publication number: WO 2025/116798 (05.06.2025 Gazette 2025/23)

(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: STRÖBERG, Viktor 701 91 Örebro (SE) WAHLMAN, Johan 701 91 Örebro (SE) SUNDLÖF, Adam 701 91 Örebro (SE) (74) Representative: Epiroc Rock Drills AB  Patents 701 91 Örebro 701 91 Örebro (SE)