Invention Grant
- Patent Title: Fixed cutter drill bit for abrasive applications
- Patent Title (中): 用于研磨应用的固定式切割钻头
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Application No.: US11367097Application Date: 2006-03-03
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Publication No.: US07798256B2Publication Date: 2010-09-21
- 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
- Applicant Address: US TX Houston
- Assignee: Smith International, Inc.
- Current Assignee: Smith International, Inc.
- Current Assignee Address: US TX Houston
- Main IPC: E21B10/42
- IPC: E21B10/42

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
- US20080230278A9 Fixed cutter drill bit for abrasive applications Public/Granted day:2008-09-25
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