(19)
(11) EP 2 358 971 A1

(12)

(43) Date of publication:
24.08.2011 Bulletin 2011/34

(21) Application number: 09828432.6

(22) Date of filing: 24.11.2009
(51) International Patent Classification (IPC): 
E21B 17/18(2006.01)
E21B 21/12(2006.01)
(86) International application number:
PCT/AU2009/001527
(87) International publication number:
WO 2010/060134 (03.06.2010 Gazette 2010/22)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

(30) Priority: 25.11.2008 AU 2008906093

(71) Applicant: Camstar Nominees Pty Ltd
Malaga, Western Australia 6090 (AU)

(72) Inventor:
  • CORPORAAL, Hendrik
    Malaga, Western Australia 6090 (AU)

(74) Representative: Jeppesen, Jens et al
Patentgruppen A/S Arosgaarden Aaboulevarden 31
8000 Aarhus C
8000 Aarhus C (DK)

   


(54) DRILL STRING