(19)

(11)

EP 3 433 462 A1

(12)

(43) Date of publication: 30.01.2019 Bulletin 2019/05 (21) Application number: 17771091.0 (22) Date of filing: 22.03.2017

(51) International Patent Classification (IPC):  E21B 7/00(2006.01) E21B 29/00(2006.01) (86) International application number: PCT/US2017/023649 (87) International publication number: WO 2017/165559 (28.09.2017 Gazette 2017/39)

(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 Designated Validation States: MA MD (30) Priority: 24.03.2016 US 201615080251 (71) Applicant: GeoDynamics, Inc. Millsap, TX 76066 (US)	(72) Inventor: HARDESTY, John, T. Millsap, TX 76066 (US) (74) Representative: Barker Brettell LLP  100 Hagley Road Edgbaston Birmingham B16 8QQ Birmingham B16 8QQ (GB)