Invention Grant
- Patent Title: Matrix diamond drag bit with PCD cylindrical cutters
- Patent Title (中): 矩阵钻石拖曳与PCD圆柱形切割机
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Application No.: US630682Application Date: 1990-12-20
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Publication No.: US5056382APublication Date: 1991-10-15
- Inventor: Mark Clench
- Applicant: Mark Clench
- Applicant Address: TX Houston
- Assignee: Smith International, Inc.
- Current Assignee: Smith International, Inc.
- Current Assignee Address: TX Houston
- Main IPC: B23P13/02
- IPC: B23P13/02 ; B23P15/28 ; E21B10/56 ; E21B10/567
Abstract:
A drag bit mold fabricated from high temperature resisting material is machined to accept cylindrically shaped polycrystalline diamond cutters (PCD) having tungsten carbide bodies. Each of the multiple PCD matrix pockets in the mold is formed by two independent non-parallel end mill passes. The first end mill cut defines the PCD cutter position in the cutting face of the matrix diamond drag bit. The second end mill cut superimposed over the first end mill pocket creates a surrounding pocket which fills with powder metallurgy matrix material to provide support for the cylindrical cutter.
Public/Granted literature
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