(19)

(11)

EP 3 175 075 A2

(12)

(88) Date of publication A3: 31.03.2016 (43) Date of publication: 07.06.2017 Bulletin 2017/23 (21) Application number: 15747205.1 (22) Date of filing: 31.07.2015

(51) International Patent Classification (IPC):  E21B 7/20(2006.01) (86) International application number: PCT/GB2015/052218 (87) International publication number: WO 2016/016657 (04.02.2016 Gazette 2016/05)

(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 Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 01.08.2014 GB 201413693 (71) Applicant: Deep Casing Tools Limited Aberdeen AB 11 5DP (GB)	(72) Inventor: SCOTT, Edward Docherty Fife KY5 0BW (GB) (74) Representative: Murray, David Craig  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)