(19)
(11) EP 2 278 113 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.12.2017 Bulletin 2017/50

(43) Date of publication A2:
26.01.2011 Bulletin 2011/04

(21) Application number: 10181236.0

(22) Date of filing: 02.02.2004
(51) International Patent Classification (IPC): 
E21B 7/20(2006.01)
E21B 7/08(2006.01)
E21B 21/10(2006.01)
E21B 47/01(2012.01)
 E21B 7/18(2006.01)
E21B 33/14(2006.01)
E21B 41/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

(30) Priority: 31.01.2003 US 444088 P
05.03.2003 US 452317 P
05.03.2003 US 452202 P
05.03.2003 US 452186 P

(62) Application number of the earlier application in accordance with Art. 76 EPC:
04707464.6 / 1588015

(71) Applicant: Weatherford Technology Holdings, LLC
Houston, TX 77056 (US)

(72) Inventors:
  • Giroux, Richard L.
    Cypress, TX 77429 (US)
  • Galloway, Gregory G.
    Conroe, TX 77304 (US)
  • Le, Tuong Thanh
    Katy, TX 77450 (US)
  • Jackson, Raymond H.
    Spring, TX 77379 (US)
  • Nazzal, Gregory R.
    Kingwood, TX 77345 (US)
  • Swarr, James C.
    The Woodlands, TX 77382 (US)
  • Brunnert, David J.
    Cypress, TX 77429 (US)
  • Beasley, William M.
    31952, AlKhobar-Dammam Highway (SA)
  • Lirette, Brent J.
    Cypress, TX 77429 (US)
  • Odell, Albert C.
    Houston, TX 77041 (US)
  • Terry, Jim
    Houston, TX 77041 (US)
  • McKay, David
    Houston, TX 77041 (US)
  • Alkhatib, Samir
    Houston, TX 77041 (US)
  • Wardley, Mike
    Aberdeenshire, AB30 1EQ (GB)

(74) Representative: Frontoni, Stefano 
Buzzi, Notaro & Antonielli d'Oulx Via Maria Vittoria, 18
10123 Torino
10123 Torino (IT)

   


(54) Apparatus and methods for drilling a wellbore using casing


(57) Apparatus and methods for drilling with casing. In an embodiment, methods and apparatus for deflecting casing using a diverter apparatus are disclosed. In another embodiment, the apparatus comprises a motor operating system disposed in a motor system housing, a shaft operatively connected to the motor operating system, the shaft having a passageway, and a divert assembly disposed to direct fluid flow selectively to the motor operating system and the passageway in the shaft. In another aspect, methods and apparatus for directionally drilling a casing into the formation are disclosed. Methods and apparatus for measuring the trajectory of a wellbore while directionally drilling a casing into the formation are also described.







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