(19)

(11)

EP 1 402 146 A1

(12)

(43) Date of publication: 31.03.2004 Bulletin 2004/14 (21) Application number: 02744049.4 (22) Date of filing: 27.06.2002

(51) International Patent Classification (IPC)7: E21B 7/20, E21B 10/66 (86) International application number: PCT/SE2002/001273 (87) International publication number: WO 2003/004824 (16.01.2003 Gazette 2003/03)

(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: 02.07.2001 SE 0102373 (71) Applicant: Löf, Uno S-686 93 Sunne (SE)	(72) Inventor: Löf, Uno S-686 93 Sunne (SE) (74) Representative: Johansson, Lars E.  Hynell Patenttjänst ABPatron Carls Väg 2 683 40 Hagfors/Uddeholm 683 40 Hagfors/Uddeholm (SE)