(19)
(11) EP 1 276 828 A1

(12)

(43) Date of publication:
22.01.2003 Bulletin 2003/04

(21) Application number: 01917236.0

(22) Date of filing: 28.03.2001
(51) International Patent Classification (IPC)7C09K 7/00, E21B 37/06
(86) International application number:
PCT/GB0101/382
(87) International publication number:
WO 0107/4966 (11.10.2001 Gazette 2001/41)
(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: 31.03.2000 GB 0007830
18.05.2000 US 205031 P

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

(72) Inventors:
  • SCOVELL, Edward, George
    Great Ayton,Middlesbrough TS9 6DS (GB)
  • GRAINGER, Neil
    Stockton-on-Tees,Cleveland TS15 5EU (GB)
  • COX, Terence
    Saltburn,Cleveland TS12 1PQ (GB)

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

   


(54) MAINTENANCE OF OIL PRODUCTION AND REFINING EQUIPMENT