(19)

(11)

EP 3 102 772 A1

(12)

(43) Date of publication: 14.12.2016 Bulletin 2016/50 (21) Application number: 15745800.1 (22) Date of filing: 06.02.2015

(51) International Patent Classification (IPC):  E21B 10/08(2006.01) E21B 10/62(2006.01) E21B 10/18(2006.01) (86) International application number: PCT/US2015/014880 (87) International publication number: WO 2015/120311 (13.08.2015 Gazette 2015/32)

(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: 07.02.2014 US 201461937221 P (71) Applicant: Varel International, Ind., L.P. Carrollton, TX 75006 (US)	(72) Inventors: HARRINGTON, David Michel Dallas, TX 75229 (US) KING, William W. Houston, TX 77069 (US) MAURSTAD, Cary Andrew Friendswood, TX 77546 (US) (74) Representative: Setréus, Ellen  Sandvik Intellectual Property AB 811 81 Sandviken 811 81 Sandviken (SE)