(19)

(11)

EP 2 291 575 A2

(12)

(43) Date of publication: 09.03.2011 Bulletin 2011/10 (21) Application number: 09769563.9 (22) Date of filing: 24.06.2009

(51) International Patent Classification (IPC):  E21B 19/00(2006.01) E21B 19/22(2006.01) (86) International application number: PCT/GB2009/001580 (87) International publication number: WO 2009/156722 (30.12.2009 Gazette 2009/53)

(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 TR Designated Extension States: AL BA RS (30) Priority: 25.06.2008 GB 0811640 (71) Applicant: Expro AX-S Technology Limited Lion House Dyce Aberdeen AB21 0LQ (GB)	(72) Inventor: SHAND, David Aberdeen AB21 0LQ (GB) (74) Representative: Naismith, Robert Stewart  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)