(19)

(11)

EP 3 055 489 A1

(12)

(43) Date of publication: 17.08.2016 Bulletin 2016/33 (21) Application number: 14852031.5 (22) Date of filing: 02.10.2014

(51) International Patent Classification (IPC):  E21B 33/035(2006.01) E21B 17/01(2006.01) E21B 33/043(2006.01) (86) International application number: PCT/US2014/058786 (87) International publication number: WO 2015/054020 (16.04.2015 Gazette 2015/15)

(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: 09.10.2013 US 201361888597 P (71) Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. 2596 HR The Hague (NL)	(72) Inventors: BUCHAN, Colin Stuart Houston, Texas 77079 (US) CANNON, Geoffrey David Katy, Texas 77450 (US) STEWART, David William 50490 Kuala Lumpur (MY) (74) Representative: Matthezing, Robert Maarten  Shell International B.V. Intellectual Property Services P.O. Box 384 2501 CJ The Hague 2501 CJ The Hague (NL)