Invention Application
- Patent Title: FIXED CUTTER DRILL BIT FOR ABRASIVE APPLICATIONS
- Patent Title (中): 固定切割机钻头用于磨料应用
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Application No.: US13196627Application Date: 2011-08-02
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Publication No.: US20120024604A1Publication Date: 2012-02-02
- Inventor: Carl Hoffmaster , Shelton W. Alsup , Michael G. Azar , Thomas W. Oldham , Stuart R. Oliver , Sidney J. Isnor
- Applicant: Carl Hoffmaster , Shelton W. Alsup , Michael G. Azar , Thomas W. Oldham , Stuart R. Oliver , Sidney J. Isnor
- Main IPC: E21B7/00
- IPC: E21B7/00 ; E21B10/36

Abstract:
The invention provides a fixed cutter drill bit for drilling through unconsolidated, highly abrasive formations. The bit includes a bit body having a cutting face and a side portion. The bit body comprising carbide matrix material. A plurality of blades azimuthally spaced about the cutting face and a plurality of cutters disposed along the blades. At least one gage pad is disposed along a side of the bit body and includes wear resistant gage elements formed of a material more wear resistant than the matrix material forming a portion of the gage pad. The wear resistant elements have a rounded surface and are embedded in gage pad material proximal a leading edge of the gage pad to provide a rounded wear-resistant edge or surface proximal the leading edge.
Public/Granted literature
- US09145739B2 Fixed cutter drill bit for abrasive applications Public/Granted day:2015-09-29
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