(19)
(11) EP 0 961 867 A1

(12)

(43) Date of publication:
08.12.1999 Bulletin 1999/49

(21) Application number: 98909878.0

(22) Date of filing: 25.02.1998
(51) International Patent Classification (IPC): 
E02B 17/ 02( . )
E21B 33/ 037( . )
 E21B 7/ 136( . )
E21B 43/ 01( . )
(86) International application number:
PCT/NO1998/000054
(87) International publication number:
WO 1998/039550 (11.09.1998 Gazette 1998/36)
(84) Designated Contracting States:
DK FR GB NL

(30) Priority: 05.03.1997 NO 19970001001

(71) Applicant: NORSK HYDRO ASA
0240 Oslo (NO)

(72) Inventors:
  • DRANGE, Stein, Olav
    N-5067 Store Milde (NO)
  • NILSEN, Per, Erik
    N-5050 Nesttun (NO)
  • OTTEREN, Audun
    N-5047 Fana (NO)
  • HERFJORD, Kjell
    N-5050 Nesttun (NO)

(74) Representative: Bleukx, Lucas Lodewijk M. 
Hydro S.A. Avenue Marcel Thiry 83
1200 Bruxelles
1200 Bruxelles (BE)

   


(54) STRUCTURE FOR THE PRODUCTION OF OIL AND/OR GAS AT SEA