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(11)

EP 2 220 334 A1

(12)

(43) Date of publication: 25.08.2010 Bulletin 2010/34 (21) Application number: 08844445.0 (22) Date of filing: 03.11.2008

(51) International Patent Classification (IPC):  E21B 19/00(2006.01) E21B 19/15(2006.01) E21B 19/14(2006.01) (86) International application number: PCT/US2008/082260 (87) International publication number: WO 2009/059301 (07.05.2009 Gazette 2009/19)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 01.11.2007 GB 0721435 (71) Applicant: Frank's International, Inc. Houston, TX 77042 (US)	(72) Inventors: BROWN, Dougal, Hugo Inverness IV3 8RQ (GB) FERGUSON, Russell, John Aberdeenshire AB21 0NR (GB) BOURGEOIS, Joshua, Kyle Lafayette LA 70508 (US) (74) Representative: Dowling, Andrew et al Haseltine Lake LLP Lincoln House, 5th Floor 300 High Holborn GB-London WC1V 7JH GB-London WC1V 7JH (GB)