Invention Grant
- Patent Title: Drill bit
- Patent Title (中): 钻头
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Application No.: US12057597Application Date: 2008-03-28
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Publication No.: US07641002B2Publication Date: 2010-01-05
- Inventor: David R. Hall , John Bailey , Casey Webb
- Applicant: David R. Hall , John Bailey , Casey Webb
- Agent Tyson J. Wilde
- Main IPC: E21B10/26
- IPC: E21B10/26 ; E21B10/54

Abstract:
In one aspect of the present invention, a rotary drag drill bit has a body intermediate a shank and a working face. The working face has a plurality of blades converging towards a center of the working face and diverging towards a gauge of the working face. A carbide section is fixed to the working face and positioned within a pocket disposed within an inverted cone of the working face. The carbide section has a distal end exposed within the working face.
Public/Granted literature
- US20080173482A1 Drill Bit Public/Granted day:2008-07-24
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