(19)

(11)

EP 2 401 465 A2

(12)

(88) Date of publication A3: 16.12.2010 (43) Date of publication: 04.01.2012 Bulletin 2012/01 (21) Application number: 10706123.6 (22) Date of filing: 26.02.2010

(51) International Patent Classification (IPC):  E21B 7/24(2006.01) (86) International application number: PCT/US2010/025622 (87) International publication number: WO 2010/099465 (02.09.2010 Gazette 2010/35)

(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 (30) Priority: 26.02.2009 US 155601 P (71) Applicant: Frank's International, Inc. Houston, TX 77042 (US)	(72) Inventor: BUYTAERT, Jean, P. Mineral Wells TX 76067 (US) (74) Representative: Dowling, Andrew  Haseltine Lake LLP Lincoln House, 5th Floor 300 High Holborn GB-London WC1V 7JH GB-London WC1V 7JH (GB)