(19)
(11) EP 1 282 674 A1

(12)

(43) Date of publication:
12.02.2003 Bulletin 2003/07

(21) Application number: 01928097.3

(22) Date of filing: 10.05.2001
(51) International Patent Classification (IPC)7C09K 7/06
(86) International application number:
PCT/GB0102/057
(87) International publication number:
WO 0108/8059 (22.11.2001 Gazette 2001/47)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

(30) Priority: 15.05.2000 GB 0011584
18.05.2000 US 205032 P

(71) Applicant: Imperial Chemical Industries PLC
London W1U 3AN (GB)

(72) Inventors:
  • GRAINGER, Neil
    Stockton-on-Tees TS17 5EU (GB)
  • COX, Terence
    Cleveland TS12 1PQ (GB)
  • SCOVELL, Edward, George
    Middlesbrough TS9 6DS (GB)

(74) Representative: Roberts, Jonathan Winstanley et al
Uniqema Intellectual Property Department,Wilton Centre
Wilton,Redcar TS10 4RF
Wilton,Redcar TS10 4RF (GB)

   


(54) DRILLING FLUIDS AND METHOD OF DRILLING