(19)

(11)

EP 2 917 469 A2

(12)

(88) Date of publication A3: 11.12.2014 (43) Date of publication: 16.09.2015 Bulletin 2015/38 (21) Application number: 13824541.0 (22) Date of filing: 05.11.2013

(51) International Patent Classification (IPC):  E21B 43/04(2006.01) E21B 34/14(2006.01) (86) International application number: PCT/US2013/068424 (87) International publication number: WO 2014/074485 (15.05.2014 Gazette 2014/20)

(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 Designated Extension States: BA ME (30) Priority: 06.11.2012 US 201213670125 (71) Applicant: Weatherford/Lamb, Inc. Houston, TX 77056 (US)	(72) Inventors: BROUSSARD, John Kingwood, TX 77345 (US) VAN PETEGEM, Ronald Montgomery, TX 77356 (US) HALL, Christopher, A. Cypress, TX 77433 (US) (74) Representative: Shanks, Andrew  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)