(19)
(11) EP 1 325 208 A2

(12)

(88) Date of publication A3:
15.08.2002

(43) Date of publication:
09.07.2003 Bulletin 2003/28

(21) Application number: 01968445.5

(22) Date of filing: 04.09.2001
(51) International Patent Classification (IPC)7E21B 21/06
(86) International application number:
PCT/US0127/408
(87) International publication number:
WO 0202/0691 (14.03.2002 Gazette 2002/11)
(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: 05.09.2000 US 230113 P

(71) Applicant: THE LUBRIZOL CORPORATION
Wickliffe,Ohio 44092-2298 (US)

(72) Inventors:
  • CAREY, Jeffrey, M.
    Mentor, OH 44060 (US)
  • HAAS, Alvin, E.
    Mentor, OH 44060 (US)
  • KEIR, Thomas, M.
    Broadview Heights, OH 44147 (US)
  • MANKA, John, S.
    Chardon, OH 44024 (US)

(74) Representative: Crisp, David Norman et al
D. YOUNG & CO.21 New Fetter Lane
London EC4A 1DA
London EC4A 1DA (GB)

   


(54) USE OF WATER SOLUBLE DEMULSIFIERS IN SEPARATING HYDROCARBON OILS FROM CLAYS