(19)

(11)

EP 2 785 961 A2

(12)

(88) Date of publication A3: 01.08.2013 (43) Date of publication: 08.10.2014 Bulletin 2014/41 (21) Application number: 12808491.0 (22) Date of filing: 15.11.2012

(51) International Patent Classification (IPC):  E21B 33/06(2006.01) (86) International application number: PCT/IB2012/056443 (87) International publication number: WO 2013/080078 (06.06.2013 Gazette 2013/23)

(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: 29.11.2011 GB 201120530 (71) Applicant: DPIR Ltd Nicosia 1078 (CY)	(72) Inventors: HALL, Peter Nicosia 1078 (CY) MUDIE, David Nicosia 1078 (CY) (74) Representative: Terry, Martin Albert Mortimer  Swindell & Pearson Limited 48 Friar Gate Derby DE1 1GY Derby DE1 1GY (GB)