(19)
(11) EP 2 880 246 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:
21.02.2018 Bulletin 2018/08

(45) Mention of the grant of the patent:
10.01.2018 Bulletin 2018/02

(21) Application number: 13825665.6

(22) Date of filing: 30.07.2013
(51) International Patent Classification (IPC): 
E21B 7/04(2006.01)
 E21B 4/00(2006.01)
(86) International application number:
PCT/US2013/052615
(87) International publication number:
WO 2014/022335 (06.02.2014 Gazette 2014/06)

(54)

DRILL BIT WITH A FORCE APPLICATION USING A MOTOR AND SCREW MECHANISM FOR CONTROLLING EXTENSION OF A PAD IN THE DRILL BIT

BOHRMEISSEL MIT EINER KRAFTANWENDUNG MITTELS EINES MOTORS UND EINES SCHRAUBMECHANISMUS ZUR STEUERUNG DER ERWEITERUNG EINES PADS IM BOHRMEISSEL

TRÉPAN AVEC APPLICATION DE FORCE UTILISANT UN MOTEUR ET UN MÉCANISME À VIS POUR COMMANDER L'EXTENSION D'UN PATIN DANS LE TRÉPAN

(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB 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: 30.07.2012 US 201213561897

(43) Date of publication of application:
10.06.2015 Bulletin 2015/24

(73) Proprietor: Baker Hughes, a GE company, LLC
Houston, TX 77210-4740 (US)

(72) Inventors:
  • SCHWEFE, Thorsten
    30916 Isernhagen (DE)
  • RAZ, Dan
    39032 Tirat Carmel (IL)
  • RINBERG, Gregory
    39032 Tirat Carmel (IL)

(74) Representative: Mabey, Katherine Frances 
Dehns St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)


(56) References cited: : 
US-A- 4 281 722
US-A1- 2010 006 341
US-A1- 2010 212 966
 US-A1- 2002 179 336
US-A1- 2010 071 956
US-B2- 7 484 576
   
       
    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).