专利检索 ap:("CNPC USA CORPORATION" OR "BEIJING HUAMEI INC.") AND inv:"Kevin Waddell" 第 1 页

1.

发明申请
Cutting Elements with Reduced Variable Back Rake Angle 有权

公开(公告)号：US20210370419A1

公开(公告)日：2021-12-02

申请号：US17331358

申请日：2021-05-26

申请人： CNPC USA CORPORATION , BEIJING HUAMEI INC.

发明人： Jiaqing YU , Chris Cheng , Ning Li , David He , Kevin Waddell , Xu Wang , Chi Ma , Xiongwen Yang

IPC分类号： 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.

2.

发明授权
Cutting elements with reduced variable back rake angle 有权

公开(公告)号：US12011773B2

公开(公告)日：2024-06-18

申请号：US17331358

申请日：2021-05-26

申请人： CNPC USA CORPORATION , BEIJING HUAMEI INC.

发明人： Jiaqing Yu , Chris Cheng , Ning Li , David He , Kevin Waddell , Xu Wang , Chi Ma , Xiongwen Yang

IPC分类号： E21B10/567 , B23C5/22

CPC分类号： B23C5/2213 , E21B10/5673 , B23C2200/123 , B23C2200/203

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.