公开(公告)号：US11199056B2

公开(公告)日：2021-12-14

申请号：US16268677

申请日：2019-02-06

申请人： James Jing Yao

发明人： James Jing Yao

IPC分类号： E21B17/042 ,  E21B10/42 ,  E21B10/38

摘要： An internally threaded bit for percussion drilling is provided, which has thread roots wider than the thread crests. A single drill bit, configured according to the present invention, can be connected to a variety of rods, having differing crest widths in their male threads. The invention enables the service life of the rods to be optimized to suit the drilling conditions at hand, without the need to manufacture and keep in inventory a correspondingly large variety of drill bits. The bit of the invention exhibits a reduced rate of ringing off, and can accept drill rods having a range of crest widths.

公开(公告)号：US20200248510A1

公开(公告)日：2020-08-06

申请号：US16268677

申请日：2019-02-06

申请人： James Jing Yao

发明人： James Jing Yao

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(公告)号：US06196598B1

公开(公告)日：2001-03-06

申请号：US09003156

申请日：1998-01-06

申请人： James Jing Yao

发明人： James Jing Yao

IPC分类号： F16B700

CPC分类号： E21B17/0426 ,  Y10T403/5746 ,  Y10T403/68

摘要： A drill rod for a drill string has a thread at each end and is connected to an adjacent rod by a sleeve. The threads on the sleeve and rod are configured to reduce stress concentrations and provide sacrificial wear on the sleeve. The thread has a single start with a part circular root and the wear volume on the sleeve is less than that on the rod. The outer diameter of the rod is at least twice that of the inner bore.

摘要翻译： 用于钻柱的钻杆在每个端部具有螺纹，并且通过套筒连接到相邻的杆。 套筒和杆上的螺纹被配置为减少应力集中并在套筒上提供牺牲磨损。 螺纹具有单个起始部分圆形根部，套筒上的磨损量小于杆上的磨损量。 杆的外径至少是内孔的两倍。