(19)

(11)

EP 1 817 476 A2

(12)

(88) Date of publication A3: 01.02.2007 (43) Date of publication: 15.08.2007 Bulletin 2007/33 (21) Application number: 05852053.7 (22) Date of filing: 22.11.2005

(51) International Patent Classification (IPC):  E21B 19/00(2006.01) (86) International application number: PCT/US2005/042419 (87) International publication number: WO 2006/058056 (01.06.2006 Gazette 2006/22)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (30) Priority: 24.11.2004 US 995907 (71) Applicant: Frank's International, Inc. Houston, TX 77079 (US)

(72) Inventors: COLE, Cory, James Lafayette, LA 70506 (US) ANGELLE, Jeremy, Richard Lafayette, LA 70508 (US) WEBRE, Charles, Michael Lafayette, LA 70501 (US) BILLEAUD, Anthony, Salles Lafayette, LA 70508 (US) BEGNAUD, Brian, David Youngsville, LA 70592 (US) (74) Representative: Wightman, David Alexander  Barker Brettell 138 Hagley Road Edgbaston Birmingham B16 9PW Edgbaston Birmingham B16 9PW (GB)