(19)
(11) EP 1 787 006 A1

(12)

(43) Date of publication:
23.05.2007 Bulletin 2007/21

(21) Application number: 05769431.7

(22) Date of filing: 05.08.2005
(51) International Patent Classification (IPC): 
E21B 43/10(2006.01)
(86) International application number:
PCT/GB2005/003102
(87) International publication number:
WO 2006/027541 (16.03.2006 Gazette 2006/11)
(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: 09.09.2004 GB 0420002

(71) Applicants:
  • BP EXPLORATION OPERATING COMPANY LIMITED
    Sunbury-on-Thames TW16 7BP (GB)
  • XL Technology, Ltd
    Ascot, Berks SL5 7NT (GB)

(72) Inventors:
  • HEAD, Philip
    Virginia Water, Surrey GU25 4PW (GB)
  • LURIE, Paul, George
    East Horsley, Surrey KT24 6AF (GB)

(74) Representative: Hymers, Ronald Robson et al
BP International Limited, Patents & Agreements Division, Chertsey Road
Sunbury-on-Thames, Middlesex, TW16 7LN
Sunbury-on-Thames, Middlesex, TW16 7LN (GB)

   


(54) METHOD FOR DRILLING OIL AND GAS WELLS