(19)
(11) EP 4 308 786 A1

(12)

(43) Date of publication:
24.01.2024 Bulletin 2024/04

(21) Application number: 22719044.4

(22) Date of filing: 21.03.2022
(51) International Patent Classification (IPC): 
E21B 17/05(2006.01)
E21B 33/13(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 33/13; E21B 17/05
(86) International application number:
PCT/NO2022/050070
(87) International publication number:
WO 2022/197189 (22.09.2022 Gazette 2022/38)
(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: 19.03.2021 NO 20210361

(71) Applicant: Archer Oiltools AS
4068 Stavanger (NO)

(72) Inventor:
  • TORVESTAD, Bjørn Tore
    4020 Stavanger (NO)

(74) Representative: Acapo AS 
Edvard Griegs vei 1
5059 Bergen
5059 Bergen (NO)

   


(54) A METHOD FOR PULLING A CASING AND A WELL INTERVENTION TOOLSTRING THEREFOR