(19)

(11)

EP 2 737 168 A2

(12)

(88) Date of publication A3: 05.12.2013 (43) Date of publication: 04.06.2014 Bulletin 2014/23 (21) Application number: 12751569.0 (22) Date of filing: 24.07.2012

(51) International Patent Classification (IPC):  E21B 34/04(2006.01) F16K 27/06(2006.01) F16K 5/06(2006.01) E21B 34/00(2006.01) (86) International application number: PCT/GB2012/051769 (87) International publication number: WO 2013/014438 (31.01.2013 Gazette 2013/05)

(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: 27.07.2011 GB 201112894 (71) Applicant: Expro North Sea Limited Aberdeenshire AB21 0LQ (GB)	(72) Inventors: MITCHELL, Craig Aberdeen Aberdeenshire AB25 1SJ (GB) TAYLOR, Keith Inverurie Aberdeenshire AB51 8SD (GB) TENNANT, Alistair Aberdeen Aberdeenshire AB21 0AD (GB) (74) Representative: Docherty, Andrew John  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)