发明申请
- 专利标题: Shirttails for reducing damaging effects of cuttings
- 专利标题(中): 用于减少切屑的破坏性影响的衬衫
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申请号: US10902222申请日: 2004-07-29
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公开(公告)号: US20060021800A1公开(公告)日: 2006-02-02
- 发明人: Christopher Beuershausen , Raul Lema , Ronald Hales , Don Nguyen , Gregory Ricks , Chih Lin , Terry Koltermann , Mark Morris , Chris McCarty , Ronald Jones , James Overstreet , Rudolf Otto Pessier
- 申请人: Christopher Beuershausen , Raul Lema , Ronald Hales , Don Nguyen , Gregory Ricks , Chih Lin , Terry Koltermann , Mark Morris , Chris McCarty , Ronald Jones , James Overstreet , Rudolf Otto Pessier
- 主分类号: E21B10/00
- IPC分类号: E21B10/00 ; E21B10/36
摘要:
An earth-boring bit has a bit body that includes head sections, each having depending bit legs with a circumferentially extending outer surface, a leading side, and a trailing side. A bearing shaft depends inwardly from each of the bit legs for mounting a cutter. The bit includes a beveled surface formed at a junction of the leading side and the outer surface of each bit leg. The beveled surface is angled relative to a radial plane emenating from the axis of the bit. The angle of the beveled surface is at least 20 degrees, and extends to an inner surface of the bit leg. The bit can also have a layer of hardfacing on the leading, trailing and shirttail surfaces of the bit leg. A diversion finger of hardfacing extends circumferentially to direct cuttings.
公开/授权文献
- US07182162B2 Shirttails for reducing damaging effects of cuttings 公开/授权日:2007-02-27
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