(19)
(11) EP 3 662 136 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:
06.12.2023 Bulletin 2023/49

(45) Mention of the grant of the patent:
01.11.2023 Bulletin 2023/44

(21) Application number: 18759676.2

(22) Date of filing: 01.08.2018
(51) International Patent Classification (IPC): 
E21B 33/14(2006.01)
 E21B 36/00(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 33/14; E21B 36/00; E21B 36/001; E21B 49/081; E21B 17/07; C09K 8/42; E21B 33/13; E21B 36/008; E21B 47/005; E21B 47/117
(86) International application number:
PCT/GB2018/052203
(87) International publication number:
WO 2019/025799 (07.02.2019 Gazette 2019/06)

(54)

DOWNHOLE APPARATUS AND METHOD

BOHRLOCHVORRICHTUNG UND -VERFAHREN

APPAREIL DE FOND DE TROU ET PROCÉDÉ

(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: 01.08.2017 GB 201712362
27.04.2018 GB 201806937

(43) Date of publication of application:
10.06.2020 Bulletin 2020/24

(73) Proprietor: Deltatek Oil Tools Limited
Aberdeen, Aberdeenshire AB21 0GL (GB)

(72) Inventors:
  • BRUCE, Stephen Edmund
    Blairgowrie Tayside PH10 6QW (GB)
  • SHAND, David Michael
    Banchory Aberdeenshire AB31 5AH (GB)
  • HORN, Tristam Paul
    Aberdeen Aberdeenshire AB15 8XJ (GB)

(74) Representative: Lawrie IP Limited 
310 St. Vincent Street
Glasgow G2 5RG
Glasgow G2 5RG (GB)


(56) References cited: : 
US-A- 3 183 971
US-A- 3 583 485
 US-A- 3 416 602
   
       
    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).