发明申请
- 专利标题： ROLLER CONE DRILL BITS WITH OPTIMIZED BEARING STRUCTURES
- 专利标题（中）： 具有优化轴承结构的滚子锥体钻头
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申请号： US11950221申请日： 2007-12-04
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公开(公告)号： US20080087471A1公开(公告)日： 2008-04-17
- 发明人: Shilin Chen , Ping Sui
- 申请人： Shilin Chen , Ping Sui
- 主分类号： E21B10/08
- IPC分类号： E21B10/08
摘要：
A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a respective cutting structure with a minimal moment center located along each respective axis of rotation. Each respective bearing structure has a center point located proximate each respective minimal moment center.
公开/授权文献
- US09493990B2 Roller cone drill bits with optimized bearing structures 公开/授权日：2016-11-15
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