(19)
(11) EP 1 614 852 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:
13.06.2007 Bulletin 2007/24

(45) Mention of the grant of the patent:
14.03.2007 Bulletin 2007/11

(21) Application number: 04724469.4

(22) Date of filing: 30.03.2004
(51) International Patent Classification (IPC): 
E21B 7/28(2006.01)
(86) International application number:
PCT/RU2004/000117
(87) International publication number:
WO 2004/090277 (21.10.2004 Gazette 2004/43)

(54)

HOLE OPENER

VORRICHTUNG ZUM ERWEITERN VON BOHRLÖCHERN

DETENDEUR DE PUITS DE FORAGE

(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 11.04.2003 RU 2003110466

(43) Date of publication of application:
11.01.2006 Bulletin 2006/02

(73) Proprietor: Otkrytoe Aktsionernoe Obschestvo "Tatneft" Im. V.D. Shashina
423450 Almetyevsk, Tatarstan (RU)

(72) Inventors:
  • TAKHAUTDINOV, Shafagat Fakhrazovich
    423450 Almetyevsk, Tatarstan (RU)
  • IBRAGIMOV, Nail Gabdulbarievich
    423450 Almetyevsk, Tatarstan (RU)
  • KAVEEV, Khamit Zagirovich
    423450 Almetyevsk, Tatarstan (RU)
  • ABDRAKHMANOV, Gabdrashit Sultanovich
    423230 Bugulma, Tatarstan (RU)
  • KHAMITYANOV, Nigamatyan Khamitovich
    423230 Bugulma, Tatarstan (RU)
  • KASHAPOV, Ilgiz Kamaevich
    423230 Bugulma, Tatarstan (RU)
  • ABDRAKHMANOV, Ruslan Gabdrashitovich
    Moscow, 117036 (RU)

(74) Representative: HOFFMANN EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)


(56) References cited: : 
RU-C1- 2 027 843
SU-A- 582 373
US-A- 3 171 503
US-B1- 6 378 632
 RU-C1- 2 172 385
SU-A- 874 952
US-A- 4 842 083
   
       
    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).