(19)

(11)

EP 2 350 422 A1

(12)

(43) Date of publication: 03.08.2011 Bulletin 2011/31 (21) Application number: 09785499.6 (22) Date of filing: 19.08.2009

(51) International Patent Classification (IPC):  E21B 12/04(2006.01) E21B 19/00(2006.01) (86) International application number: PCT/GB2009/051033 (87) International publication number: WO 2010/026404 (11.03.2010 Gazette 2010/10)

(84) Designated Contracting States: 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 Designated Extension States: AL BA RS (30) Priority: 02.09.2008 GB 0815939 03.04.2009 GB 0905782 (71) Applicant: Titan Torque Services Limited Aberdeenshire AB12 3AX (GB)	(72) Inventor: GASKIN, Keith Scott Aberdeen (GB) (74) Representative: Crosby, Wendy Agnes  Murgitroyd & Company Scotland House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)