(19)

(11)

EP 1 774 133 A1

(12)

(43) Date of publication: 18.04.2007 Bulletin 2007/16 (21) Application number: 05705763.0 (22) Date of filing: 18.01.2005

(51) International Patent Classification (IPC):  E21B 19/00(2006.01) E21B 19/24(2006.01) E21B 17/10(2006.01) (86) International application number: PCT/US2005/001326 (87) International publication number: WO 2005/071215 (04.08.2005 Gazette 2005/31)

(84) Designated Contracting States: DE GB NL (30) Priority: 15.01.2004 US 536800 P (71) Applicant: WEATHERFORD/LAMB, INC. Houston Texas 77027 (US)	(72) Inventors: HAYES, Michael Houston, TX 77095 (US) HILL, Troy, F. Lafayette, LA 70508 (US) BEDORE, Timothy Woodlands, TX 77385 (US) HOLLINGSWORTH, Jimmy, L. Lafayette, LA 70508 (US) HAUGEN, David, M. League City, TX 77573 (US) (74) Representative: Marchitelli, Mauro  c/o Buzzi, Notaro & Antonielli d'Oulx Via Maria Vittoria 18 10123 Torino 10123 Torino (IT)