(19)
(11) EP 4 278 059 A1

(12)

(43) Date of publication:
22.11.2023 Bulletin 2023/47

(21) Application number: 22738877.4

(22) Date of filing: 14.01.2022
(51) International Patent Classification (IPC): 
E21B 34/14(2006.01)
E21B 43/12(2006.01)
 E21B 23/08(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 34/142; E21B 43/162; E21B 2200/06; E21B 47/06
(86) International application number:
PCT/CA2022/050055
(87) International publication number:
WO 2022/150925 (21.07.2022 Gazette 2022/29)
(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: 14.01.2021 US 202163137311 P

(71) Applicant: NCS Multistage Inc.
Calgary, Alberta T2C 4X5 (CA)

(72) Inventors:
  • WERRIES, Michael
    Calgary, Alberta T2C 4X5 (CA)
  • POWELL, Jesse
    Calgary, Alberta T2C 4X5 (CA)
  • REDECOPP, Ryan
    Calgary, Alberta T2C 4X5 (CA)

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

   


(54) IN SITU INJECTION OR PRODUCTION VIA A WELL USING DART-ACTUATED VALVE ASSEMBLIES AND RELATED SYSTEM AND METHOD