(19)

(11)

EP 1 216 341 A2

(12)

(88) Date of publication A3: 30.08.2001 (43) Date of publication: 26.06.2002 Bulletin 2002/26 (21) Application number: 00971162.3 (22) Date of filing: 03.10.2000

(51) International Patent Classification (IPC)7: E21B 19/08 (86) International application number: PCT/BR0000/115 (87) International publication number: WO 0125/652 (12.04.2001 Gazette 2001/15)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 04.10.1999 BR 9904223 (71) Applicants: Teixeira Clo, Dalvio Emilio CEP-30140-091 Minas Gerais (BR) Teixeira Clo, Marcos Eugenio CEP-30350-010 Minas Gerais (BR) Feliciano de Souza, Marco Antonio  (BR)	(72) Inventors: Teixeira Clo, Dalvio Emilio CEP-30140-091 Minas Gerais (BR) Teixeira Clo, Marcos Eugenio CEP-30350-010 Minas Gerais (BR) Feliciano de Souza, Marco Antonio  (BR) (74) Representative: Davila Baz, Angel et al c/o Clarke, Modet & Co.,Goya, 11 28001 Madrid 28001 Madrid (ES)