(19)

(11)

EP 1 346 127 A2

(12)

(88) Date of publication A3: 30.01.2003 (43) Date of publication: 24.09.2003 Bulletin 2003/39 (21) Application number: 01998007.7 (22) Date of filing: 28.11.2001

(51) International Patent Classification (IPC)7: E21B 1/00 (86) International application number: PCT/US0144/610 (87) International publication number: WO 0206/1231 (08.08.2002 Gazette 2002/32)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 28.11.2000 US 723865 28.11.2000 US 724473 28.11.2000 US 724466 28.11.2000 US 724465 (71) Applicants: Frank's International, Inc. Houston, TX 77079 (US) Mosing, Donald Lafayette, LA 70403 (US) Sipos, David L. Youngsville, LA 70592 (US)	(72) Inventors: MOSING, Donald Lafayette, LA 70403 (US) SIPOS, David, L. Youngsville, LA 70592 (US) (74) Representative: Hedges, Martin Nicholas  A.A. Thornton & Co.235 High Holborn London WC1V 7LE London WC1V 7LE (GB)