- 专利标题： THREADED COUPLING FOR PERCUSSION DRILL BIT
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申请号： US16268677申请日： 2019-02-06
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公开(公告)号： US20200248510A1公开(公告)日： 2020-08-06
- 发明人: James Jing Yao
- 申请人： James Jing Yao
- 申请人地址： CA Mississauga
- 专利权人： Hardrock Innovations Inc.
- 当前专利权人： Hardrock Innovations Inc.
- 当前专利权人地址： CA Mississauga
- 主分类号： E21B17/042
- IPC分类号： E21B17/042 ; E21B10/38 ; E21B10/42
摘要：
An internally threaded bit for percussion drilling is provided, which has thread roots wider than the thread crests. The bit exhibits a reduced rate of ringing off, and can accept drill rods having a range of crest widths.
公开/授权文献
- US11199056B2 Threaded coupling for percussion drill bit 公开/授权日：2021-12-14
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