(19)

(11)

EP 2 580 426 A2

(12)

(88) Date of publication A3: 27.12.2012 (43) Date of publication: 17.04.2013 Bulletin 2013/16 (21) Application number: 11722133.3 (22) Date of filing: 19.05.2011

(51) International Patent Classification (IPC):  E21B 43/1185(2006.01) E21B 43/119(2006.01) (86) International application number: PCT/GB2011/000759 (87) International publication number: WO 2011/154683 (15.12.2011 Gazette 2011/50)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (30) Priority: 11.06.2010 GB 201009781 (71) Applicant: Expro North Sea Limited Dyce, Aberdeen AB21 0LQ (GB)	(72) Inventor: RICHARDS, Andy Dyce Aberdeen AB21 0LQ (GB) (74) Representative: Docherty, Andrew John  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)