Invention Grant
US07677338B2 System, method, and apparatus for passive and active updrill features on roller cone drill bits
有权
滚子锥钻头上的被动和主动式更新功能的系统,方法和装置
- Patent Title: System, method, and apparatus for passive and active updrill features on roller cone drill bits
- Patent Title (中): 滚子锥钻头上的被动和主动式更新功能的系统,方法和装置
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Application No.: US11685898Application Date: 2007-03-14
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Publication No.: US07677338B2Publication Date: 2010-03-16
- Inventor: James L. Overstreet , Robert J. Buske , Jeremy K. Morgan
- Applicant: James L. Overstreet , Robert J. Buske , Jeremy K. Morgan
- Agency: Bracewell & Giuliani LLP
- Main IPC: E21B10/28
- IPC: E21B10/28

Abstract:
Strategically placed hardfacing material near the shank end of a drill bit above the transition edges provides additional protection for compensator areas and the upper leg surfaces of drill bits during updrilling and/or backreaming operations. The strategically located hardfacing is typically passive in the normal drill mode, but active in the updrill drilling mode and/or back reaming. Alternative designs including other strategic material placement, the formation of hardfacing materials in tooth/wear design shapes, bimetallic gage, graded composite hardfacing materials, recesses or cavities at edges of the outer diameter, and various methods of applying the material also may be employed.
Public/Granted literature
- US20080223619A1 SYSTEM, METHOD, AND APPARATUS FOR PASSIVE AND ACTIVE UPDRILL FEATURES ON ROLLER CONE DRILL BITS Public/Granted day:2008-09-18
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