(19)

(11)

EP 3 030 741 A2

(12)

(88) Date of publication A3: 28.05.2015 (43) Date of publication: 15.06.2016 Bulletin 2016/24 (21) Application number: 14752915.0 (22) Date of filing: 08.08.2014

(51) International Patent Classification (IPC):  E21B 17/10(2006.01) (86) International application number: PCT/GB2014/052445 (87) International publication number: WO 2015/019114 (12.02.2015 Gazette 2015/06)

(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 (30) Priority: 08.08.2013 GB 201314266 (71) Applicant: PARADIGM DRILLING SERVICES LIMITED Aberdeenshire AB51 5GT (GB)	(72) Inventor: SIMPSON, Neil Andrew Abercrombie Aberdeenshire AB 12 4 QX (GB) (74) Representative: Shanks, Andrew  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)