(19)

(11)

EP 2 462 303 A2

(12)

(88) Date of publication A3: 14.04.2011 (43) Date of publication: 13.06.2012 Bulletin 2012/24 (21) Application number: 10806133.4 (22) Date of filing: 05.08.2010

(51) International Patent Classification (IPC):  E21B 4/14(2006.01) (86) International application number: PCT/IB2010/053549 (87) International publication number: WO 2011/016005 (10.02.2011 Gazette 2011/06)

(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 SE SI SK SM TR (30) Priority: 05.08.2009 ZA 200905462 21.09.2009 ZA 200906560 14.06.2010 ZA 201004208 (71) Applicant: Gien, Bernard Lionel Edenvale 1610, Gauteng Province (ZA)	(72) Inventor: Gien, Bernard Lionel Edenvale 1610, Gauteng Province (ZA) (74) Representative: Milhench, Mark Lorne  First Thought IP 35 New Broad Street House New Broad Street London EC2M 1NH London EC2M 1NH (GB)