(19)
(11) EP 1 365 103 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.12.2005 Bulletin 2005/52

(43) Date of publication A2:
26.11.2003 Bulletin 2003/48

(21) Application number: 03013474.6

(22) Date of filing: 04.08.2000
(51) International Patent Classification (IPC)7: E21B 4/18, E21B 47/01, E21B 47/00
(84) Designated Contracting States:
DE FR IT NL

(30) Priority: 05.08.1999 US 147533 P

(62) Application number of the earlier application in accordance with Art. 76 EPC:
00952501.5 / 1198655

(71) Applicant: BAKER HUGHES INCORPORATED
Houston, Texas 77210-4740 (US)

(72) Inventor:
  • Krueger, Volker
    29223 Celle (DE)

(74) Representative: Jeffrey, Philip Michael 
Frank B. Dehn & Co. 179 Queen Victoria Street
London EC4V 4EL
London EC4V 4EL (GB)

   


(54) Continuous wellbore drilling system with stationary sensor measurements


(57) The present invention provides continuous or near continuous motion drill strings which include motion sensitive and other MWD sensors which take stationary measurements while the drilling assembly is continuing to drill the wellbore. For simultaneous continuous drilling and stationary measurements, the present invention provides a drilling assembly wherein a force application system (402) almost continuously applies force on the drill bit (412) while maintaining a housing (406) or drill collar section stationary. Motion sensitive sensors (Sm) carried by the drill collar take stationary measurements. A steering device (420) between the drill bit and the force application system maintains drilling of the wellbore along a prescribed well path.






Search report