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(11)

EP 2 035 647 A1

(12)

(43) Date of publication: 18.03.2009 Bulletin 2009/12 (21) Application number: 07797880.7 (22) Date of filing: 30.05.2007

(51) International Patent Classification (IPC):  E21B 17/00(2006.01) E21B 17/10(2006.01) (86) International application number: PCT/US2007/069975 (87) International publication number: WO 2008/002739 (03.01.2008 Gazette 2008/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 28.06.2006 US 427251 (71) Applicant: Frank's International, Inc. Houston TX 77042 (US)	(72) Inventor: BUYTAERT, Jean Mineral Wells, TX 76067 (US) (74) Representative: Giles, Ashley Simon  Haseltine Lake Lincoln House 300 High Holborn London WC1V 7JH London WC1V 7JH (GB)