(19)
(11) EP 1 068 426 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:
09.05.2007 Bulletin 2007/19

(45) Mention of the grant of the patent:
20.09.2006 Bulletin 2006/38

(21) Application number: 99944135.5

(22) Date of filing: 17.02.1999
(51) International Patent Classification (IPC): 
E21B 43/117(2006.01)
E21B 43/267(2006.01)
 E21B 43/26(2006.01)
E21B 37/08(2006.01)
(86) International application number:
PCT/US1999/003352
(87) International publication number:
WO 1999/051853 (14.10.1999 Gazette 1999/41)

(54)

APPARATUS AND METHOD FOR STIMULATING A SUBTERRANEAN FORMATION

VORRICHTUNG UND VERFAHREN ZUR STIMULIERUNG VON UNTERIRDISCHEN FORMATIONEN

APPAREIL ET PROCEDE POUR LA STIMULATION D'UNE FORMATION SOUTERRAINE

(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 07.04.1998 US 57157

(43) Date of publication of application:
17.01.2001 Bulletin 2001/03

(73) Proprietor: MARATHON OIL COMPANY
Houston, TX 77056 (US)

(72) Inventors:
  • SNIDER, Philip, M.
    Houston, TX 77070 (US)
  • HANEY, Joseph, P.
    Coeur d'Alene, ID 83814 (US)
  • WESSON, David, S.
    DeSoto, TX 75115 (US)

(74) Representative: Mallalieu, Catherine Louise et al
D Young & Co 120 Holborn
London EC1N 2DY
London EC1N 2DY (GB)


(56) References cited: : 
US-A- 4 683 943
US-A- 5 005 641
 US-A- 4 798 244
US-A- 5 775 426
   
       
    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).