Title:
DRILLING DEVICE COMPRISING A TUBULAR SHEATH SECURED TO AN ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2019/144225
Kind Code:
A1
Abstract:
Drilling device (20) comprising an actuator (21) comprising an actuator body (22) and a rod (23) bearing at its free end a drill bit (24), a tubular sheath (25) secured to the actuator body (22) and comprising walls surrounding the drill bit (24) and a lower opening (33), a system (28) for detecting contact between the drill bit (24) and the electrolyte bath (3) by analysis of an electric signal; the tubular sheath (25) being secured to the actuator body (22) by means of an electrically insulating fastener (31, 31'), and the rod (23) and the drill bit (24) being remote from the walls of the tubular sheath (25) when the drill bit (24) is moved with respect to at least one lower portion of the tubular sheath (25) and below the lower opening (33).
Inventors:
BRUN FRÉDÉRIC (CA)
MUNOZ DAVID (FR)
RENAUDIER STEEVE (FR)
MUNOZ DAVID (FR)
RENAUDIER STEEVE (FR)
Application Number:
PCT/CA2019/050081
Publication Date:
August 01, 2019
Filing Date:
January 23, 2019
Export Citation:
Assignee:
RIO TINTO ALCAN INT LTD (CA)
International Classes:
C25C3/14
Foreign References:
| CA2604971A1 | 2006-10-26 | |||
| US5045168A | 1991-09-03 | |||
| FR3016898A1 | 2015-07-31 | |||
| FR3062137A1 | 2018-07-27 | |||
| DE19645251A1 | 1998-05-07 | |||
| US20110073466A1 | 2011-03-31 | |||
| FR2872176A1 | 2005-12-30 | |||
| CA1179975A | 1984-12-27 |
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