(19)
(11) EP 3 990 745 A1

(12)

(43) Date of publication:
04.05.2022 Bulletin 2022/18

(21) Application number: 20736796.2

(22) Date of filing: 18.06.2020
(51) International Patent Classification (IPC): 
E21B 21/01(2006.01)
(52) Cooperative Patent Classification (CPC):
E21B 21/01
(86) International application number:
PCT/IT2020/050152
(87) International publication number:
WO 2020/261305 (30.12.2020 Gazette 2020/53)
(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:
KH MA MD TN

(30) Priority: 28.06.2019 IT 201900010488

(71) Applicant: Casagrande S.P.A.
33074 Fontanafredda (IT)

(72) Inventor:
  • CASAGRANDE, Mauro
    33077 SACILE (IT)

(74) Representative: Petraz, Gilberto Luigi et al
GLP S.r.l.
Viale Europa Unita, 171 33100 Udine
Viale Europa Unita, 171 33100 Udine (IT)

   


(54) DRILLING HEAD