(19)
(11) EP 1 567 890 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:
04.04.2007 Bulletin 2007/14

(21) Application number: 03750087.3

(22) Date of filing: 07.05.2003
(51) International Patent Classification (IPC): 
G01V 3/28(2006.01)
(86) International application number:
PCT/US2003/014345
(87) International publication number:
WO 2003/096074 (20.11.2003 Gazette 2003/47)

(54)

APPARATUS AND METHOD FOR MEASURING MUD RESISTIVITY USING A DEFOCUSED ELECTRODE SYSTEM

MESSGERÄT UND METHODE ZUR MESSUNG DES WIDERSTANDES DES BOHRLOCHSCHLAMMS UNTER VERWENDUNG EINES DEFOKUSIERENDEN ELEKTRODENSYSTEMS

APPAREIL ET PROCEDE DE MESURE DE LA RESISTIVITE DE LA BOUE AU MOYEN D'UN SYSTEME D'ELECTRODES DEFOCALISE

(84) Designated Contracting States:
FR GB

(30) Priority: 09.05.2002 US 142307

(43) Date of publication of application:
31.08.2005 Bulletin 2005/35

(73) Proprietor: BAKER HUGHES INCORPORATED
Houston, Texas 77027 (US)

(72) Inventors:
  • FABRIS, Antonio
    Houston, TX 77077 (US)
  • KHOKHAR, Rashid
    Houston, TX 77083 (US)

(74) Representative: Vigars, Christopher Ian 
HASELTINE LAKE, Redcliff Quay, 120 Redcliff Street
Bristol BS1 6HU
Bristol BS1 6HU (GB)


(56) References cited: : 
EP-A- 0 013 224
US-A- 4 658 215
 EP-B- 0 544 583
US-A- 6 046 593
   
       
    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).