(19)

(11)

EP 2 961 927 A2

(12)

(88) Date of publication A3: 23.04.2015 (43) Date of publication: 06.01.2016 Bulletin 2016/01 (21) Application number: 14716001.4 (22) Date of filing: 26.02.2014

(51) International Patent Classification (IPC):  E21D 11/10(2006.01) (86) International application number: PCT/IB2014/059260 (87) International publication number: WO 2014/132198 (04.09.2014 Gazette 2014/36)

(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: 28.02.2013 IT BO20130089 (71) Applicant: Elas Geotecnica S.r.l. 20090 Segrate (Milano) (IT)	(72) Inventor: BONOMI, Cristiano I-20068 Peschiera Borromeo (MI) (IT) (74) Representative: Provvisionato, Paolo  Provvisionato & Co S.r.l. Piazza di Porta Mascarella 7 40126 Bologna 40126 Bologna (IT)