(19)
(11) EP 4 028 625 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
05.03.2025 Bulletin 2025/10

(45) Mention of the grant of the patent:
22.01.2025 Bulletin 2025/04

(21) Application number: 20771836.2

(22) Date of filing: 11.09.2020
(51) International Patent Classification (IPC): 
E21B 7/12(2006.01)
E21B 19/09(2006.01)
 E21B 19/00(2006.01)
E21B 7/128(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 7/12; E21B 19/006; E21B 19/09; E21B 7/128; E21B 2200/20
(86) International application number:
PCT/EP2020/075560
(87) International publication number:
WO 2021/048416 (18.03.2021 Gazette 2021/11)

(54)

METHOD OF PLANNING AND/OR PERFORMING AN OFFSHORE WELL OPERATION

VERFAHREN ZUR PLANUNG UND/ODER DURCHFÜHRUNG VON OFFSHORE-BOHROPERATIONEN

PROCÉDÉ DE PLANIFICATION ET/OU DE RÉALISATION D'UNE EXPLOITATION DANS UN PUITS EN MER

(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 12.09.2019 GB 201913138

(43) Date of publication of application:
20.07.2022 Bulletin 2022/29

(73) Proprietor: Heavelock Solutions AS
7462 Trondheim (NO)

(72) Inventors:
  • KVERNLAND, Martin
    7462 Trondheim (NO)
  • GORSKI, Dmitri
    7462 Trondheim (NO)
  • AAMO, Ole Morten
    7462 Trondheim (NO)
  • SANGESLAND, Sigbjørn
    7462 Trondheim (NO)

(74) Representative: Lincoln, Matthew et al
Lincoln IP 4 Rubislaw Place
Aberdeen AB10 1XN
Aberdeen AB10 1XN (GB)


(56) References cited: : 
WO-A1-2015/183492
   
  • WOJCIECH STANISLAW CHRZANOWSKI: "Managed Pressure Drilling from Floaters: Feasibility Studies for Applying Managed Pressure Drilling from a floater on the Skarv/Idun field on the Norwegian Continental Shelf by PGNiG Norway AS", 15 June 2011 (2011-06-15), pages 1 - 130, XP055074979, Retrieved from the Internet <URL:https://uis.brage.unit.no/uis-xmlui/handle/11250/183392> [retrieved on 20130813]
  • STRECKER TIMM ET AL: "Rejecting heave-induced pressure oscillations in a semilinear hyperbolic well model", 2017 AMERICAN CONTROL CONFERENCE (ACC), AACC, 24 May 2017 (2017-05-24), pages 1163 - 1168, XP033110068, DOI: 10.23919/ACC.2017.7963110
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).