- 专利标题: Method for producing a drill shaft for a wet drill bit
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申请号: US16472721申请日: 2017-11-28
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公开(公告)号: US11724339B2公开(公告)日: 2023-08-15
- 发明人: Florian Schroeder , Christoph Weber , Roland Schneider
- 申请人: Hilti Aktiengesellschaft
- 申请人地址: LI Schaan
- 专利权人: Hilti Aktiengesellschaft
- 当前专利权人: Hilti Aktiengesellschaft
- 当前专利权人地址: LI Schaan
- 代理机构: Crowell & Moring LLP
- 优先权: EP 206534 2016.12.23
- 国际申请: PCT/EP2017/080665 2017.11.28
- 国际公布: WO2018/114242A 2018.06.28
- 进入国家日期: 2019-06-21
- 主分类号: E21B10/44
- IPC分类号: E21B10/44 ; B23K26/302 ; B23D65/00 ; B21C37/12 ; E21B17/04 ; B23K101/00
摘要:
A method for producing a drill shaft for a wet drill bit includes forming N, where N≥1, strip materials into a tubular body where the tubular body is integrally joined at strip edges of the strip materials by N connection welds. At least one strip material of the strip materials is provided with at least one recess before the integral joining of the strip edges.
公开/授权文献
- US20210129267A1 Method for Producing a Drill Shaft for a Wet Drill Bit 公开/授权日:2021-05-06
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