- 专利标题： Cutting elements with reduced variable back rake angle
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申请号： US17331358申请日： 2021-05-26
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公开(公告)号： US12011773B2公开(公告)日： 2024-06-18
- 发明人: Jiaqing Yu , Chris Cheng , Ning Li , David He , Kevin Waddell , Xu Wang , Chi Ma , Xiongwen Yang
- 申请人： CNPC USA CORPORATION , BEIJING HUAMEI INC.
- 申请人地址： US TX Houston
- 专利权人： CNPC USA Corporation,Beijing Huamei, Inc.
- 当前专利权人： CNPC USA Corporation,Beijing Huamei, Inc.
- 当前专利权人地址： US TX Houston; CN Beijing
- 代理机构： Ramey LLP
- 代理商 Jacob B. Henry
- 主分类号： E21B10/567
- IPC分类号： E21B10/567 ; B23C5/22
摘要：
A drill bit for cutting formation comprises a bit body, a plurality of cutters, and a plurality of blades with pockets to accommodate the cutters, respectively. In an embodiment, the plurality of cutters comprise a substrate, an ultra-hard layer, a concave surface on the top of the ultra-hard layer, wherein the concave surface comprises a plurality of planar and curved surfaces.
公开/授权文献
- US20210370419A1 Cutting Elements with Reduced Variable Back Rake Angle 公开/授权日：2021-12-02
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