(19)
(11) EP 4 409 105 A1

(12)

(43) Date of publication:
07.08.2024 Bulletin 2024/32

(21) Application number: 22840446.3

(22) Date of filing: 27.11.2022
(51) International Patent Classification (IPC): 
E21B 23/00(2006.01)
E21B 17/10(2006.01)
 E21B 41/00(2006.01)
E21B 27/02(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 17/1057; E21B 17/1078; E21B 23/00; E21B 27/02; E21B 41/00
(86) International application number:
PCT/US2022/051026
(87) International publication number:
WO 2023/101893 (08.06.2023 Gazette 2023/23)
(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

(30) Priority: 03.12.2021 US 202117542073
19.12.2021 US 202116720879

(71) Applicant: Saudi Arabian Oil Company
Dhahran 31311 (SA)

(72) Inventors:
  • RAMASAMY, Jothibasu
    Dhahran, 31311 (SA)
  • GOONERATNE, Chinthaka
    Dhahran, 31311 (SA)
  • XU, Jianhui
    Dhahran, 31311 (SA)

(74) Representative: Marks & Clerk LLP 
15 Fetter Lane
London EC4A 1BW
London EC4A 1BW (GB)

   


(54) MAGNETICALLY CONTROLLED RELEASE OF CHEMICALS IN A DOWNHOLE ENVIRONMENT