(19)
(11) EP 3 452 690 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:
28.10.2020 Bulletin 2020/44

(45) Mention of the grant of the patent:
01.07.2020 Bulletin 2020/27

(21) Application number: 17723488.7

(22) Date of filing: 05.05.2017
(51) International Patent Classification (IPC): 
E21B 33/134(2006.01)
 E21B 36/00(2006.01)
(86) International application number:
PCT/GB2017/051262
(87) International publication number:
WO 2017/191471 (09.11.2017 Gazette 2017/45)

(54)

CHEMICAL HEAT SOURCES FOR USE IN DOWN-HOLE OPERATIONS

CHEMISCHE WÄRMEQUELLEN ZUR VERWENDUNG IN BOHRLOCHOPERATIONEN

SOURCES DE CHALEUR CHIMIQUE DESTINÉES À ÊTRE UTILISÉES DANS DES OPÉRATIONS DE FOND DE TROU

(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: 06.05.2016 GB 201607912
30.03.2017 GB 201705149

(43) Date of publication of application:
13.03.2019 Bulletin 2019/11

(60) Divisional application:
20183119.5

(73) Proprietor: BiSN Tec Ltd
Birchwood Warrington Cheshire WA3 6DE (GB)

(72) Inventors:
  • CARRAGHER, Paul
    Warrington Cheshire WA3 6DE (GB)
  • OWEN, Ray
    Warrington Cheshire WA3 6DE (GB)

(74) Representative: Forresters IP LLP 
Skygarden Erika-Mann-Straße 11
80636 München
80636 München (DE)


(56) References cited: : 
EP-A1- 1 933 004
WO-A2-2014/096857
US-A1- 2006 144 591
US-A1- 2011 174 484
 WO-A1-2013/066340
GB-A- 2 164 886
US-A1- 2011 146 519
   
       
    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).