(19)

(11)

EP 2 776 659 A1

(12)

(43) Date of publication: 17.09.2014 Bulletin 2014/38 (21) Application number: 12778584.8 (22) Date of filing: 10.10.2012

(51) International Patent Classification (IPC):  E21B 34/02(2006.01) (86) International application number: PCT/US2012/059616 (87) International publication number: WO 2014/058424 (17.04.2014 Gazette 2014/16)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR (71) Applicant: Cameron International Corporation Houston, TX 77027 (US)	(72) Inventors: GUIDRY, Kirk Paul Houston, TX 77041 (US) RADWANSKI, Stefan Marek Houston, TX 77041 (US) (74) Representative: Akers, Noel James  N.J. Akers & Co 63 Lemon Street Truro, Cornwall TR1 2PN Truro, Cornwall TR1 2PN (GB)