发明授权
- 专利标题: METHOD OF MANUFACTURING A ROLLER CONE DRILL BIT WITH IMPROVED EROSION RESISTANCE
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申请号: EP17170319.2申请日: 2017-05-10
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公开(公告)号: EP3243926B1公开(公告)日: 2020-07-22
- 发明人: GALLIFET, Thomas , STROEVER, Matthew charles
- 申请人: Varel International, Ind., L.P.
- 申请人地址: 1625 West Crosby Suite 124 Carrollton, TX 75006 US
- 专利权人: Varel International, Ind., L.P.
- 当前专利权人: Varel International, Ind., L.P.
- 当前专利权人地址: 1625 West Crosby Suite 124 Carrollton, TX 75006 US
- 代理机构: Cabinet Nuss
- 优先权: US201615151552 20160511
- 主分类号: C23C8/04
- IPC分类号: C23C8/04 ; C23C8/22 ; C23C8/80 ; E21B10/52
公开/授权文献
- EP3243926A1 ROLLER CONE DRILL BIT WITH IMPROVED EROSION RESISTANCE 公开/授权日:2017-11-15
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