(19)

(11)

EP 3 394 381 A1

(12)

(43) Date of publication: 31.10.2018 Bulletin 2018/44 (21) Application number: 15816793.2 (22) Date of filing: 22.12.2015

(51) International Patent Classification (IPC):  E21B 7/02(2006.01) E21B 15/02(2006.01) E21B 49/02(2006.01) E21B 7/124(2006.01) E21B 19/14(2006.01) E02B 17/00(2006.01) (86) International application number: PCT/EP2015/080997 (87) International publication number: WO 2017/108098 (29.06.2017 Gazette 2017/26)

(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 (71) Applicant: Control y Prospecciones Igeotest, S.L. 17600 Figueres (Girona) (ES)	(72) Inventor: DEVINCENZI FABETTI, Marcelo 17600 Figueres (Girona) (ES) (74) Representative: Herrero & Asociados, S.L.  Cedaceros, 1 28014 Madrid 28014 Madrid (ES)