(19)

(11)

EP 3 052 737 A1

(12)

(43) Date of publication: 10.08.2016 Bulletin 2016/32 (21) Application number: 14851198.3 (22) Date of filing: 02.10.2014

(51) International Patent Classification (IPC):  E21B 10/46(2006.01) (86) International application number: PCT/US2014/058879 (87) International publication number: WO 2015/051158 (09.04.2015 Gazette 2015/14)

(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: 02.10.2013 US 201361885772 P (71) Applicant: Varel International, Ind., L.P. Carrollton, TX 75006 (US)	(72) Inventor: KING, William, W. Houston, TX 77069 (US) (74) Representative: Neilson, Martin Mark  Urquhart-Dykes & Lord LLP Tower North Central Merrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)