(19)
(11) EP 1 836 272 A2

(12)

(88) Date of publication A3:
10.08.2006

(43) Date of publication:
26.09.2007 Bulletin 2007/39

(21) Application number: 05807816.3

(22) Date of filing: 23.11.2005
(51) International Patent Classification (IPC): 
C09K 8/36(2006.01)
(86) International application number:
PCT/GB2005/004504
(87) International publication number:
WO 2006/056774 (01.06.2006 Gazette 2006/22)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

(30) Priority: 23.11.2004 GB 0425679

(71) Applicant: M-I L.L.C.
Texas 77072 (US)

(72) Inventors:
  • SAWDON, Christopher Alan
    Biscovey Par Cornwall PL24 2HJ (GB)
  • BAILEY, Louise
    St Neots Cambridgeshire PE19 6SD (GB)
  • KEFI, Slaheddine
    Cottenham Cambridgeshire CB4 8RD (GB)
  • PHIPPS, Jonathan
    Lower Cambourne Cambridgeshire CB3 6BU (GB)

(74) Representative: Gill, Stephen Charles et al
Mewburn Ellis LLP York House 23 Kingsway
GB-London WC2B 6HP
GB-London WC2B 6HP (GB)

   


(54) EMULSIFIER-FREE WELLBORE FLUID