(19)
(11) EP 3 924 594 A1

(12)

(43) Date of publication:
22.12.2021 Bulletin 2021/51

(21) Application number: 20704988.3

(22) Date of filing: 17.01.2020
(51) International Patent Classification (IPC): 
E21B 17/00(2006.01)
E21B 17/10(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 17/1071; E21B 17/1085; E21B 17/00
(86) International application number:
PCT/US2020/014094
(87) International publication number:
WO 2020/167413 (20.08.2020 Gazette 2020/34)
(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: 15.02.2019 US 201916276658

(71) Applicant: Weatherford Technology Holdings, LLC
Houston, TX 77056 (US)

(72) Inventor:
  • BADRAK, Robert P.
    Houston, TX 77056 (US)

(74) Representative: Docherty, Andrew John 
Marks & Clerk LLP Aurora 120 Bothwell Street
Glasgow G2 7JS
Glasgow G2 7JS (GB)

   


(54) CORROSION AND ABRASION RESISTANT SUCKER ROD