(19)

(11)

EP 2 329 097 A1

(12)

(43) Date of publication: 08.06.2011 Bulletin 2011/23 (21) Application number: 09791936.9 (22) Date of filing: 26.08.2009

(51) International Patent Classification (IPC):  E21B 17/01(2006.01) (86) International application number: PCT/US2009/055028 (87) International publication number: WO 2010/027850 (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: 05.09.2008 US 205050 (71) Applicant: FMC Technologies, Inc. Houston, TX 77067 (US)	(72) Inventor: SKEELS, Harold, Brian Kingwood TX 77345 (US) (74) Representative: Charlton, Peter John  Elkington and Fife LLP, Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Kent TN13 1XR (GB)