(19)
(11) EP 1 144 803 A3

(12)

(88) Date of publication A3:
30.08.2001

(43) Date of publication A2:
17.10.2001 Bulletin 2001/42

(21) Application number: 00954718.3

(22) Date of filing: 17.08.2000
(51) International Patent Classification (IPC)7E21B 34/10
(86) International application number:
PCT/GB0003/200
(87) International publication number:
WO 0101/2949 (22.02.2001 Gazette 2001/08)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 17.08.1999 GB 9919270

(71) Applicant: Quartech Engineering Limited
Tonbridge, Kent TN10 4NT (GB)

(72) Inventor:
  • FRENCH, Clive, John
    B-5100 Jambes (BE)

(74) Representative: Shanks, Andrew et al
Cruikshank & Fairweather,19 Royal Exchange Square
Glasgow G1 3AE
Glasgow G1 3AE (GB)

 
Remarks:
WIPO A3 publication data is not currently available.
 


(54) DOWNHOLE FLAPPER VALVE ASSEMBLY