发明名称 COMPOUND DIAMOND CUTTER
摘要 A diamond drag bit is disclosed that utilizes stud type PDC cutters that have dome shaped polycrystalline diamond depth of penetration limiters fused to the tungsten carbide surface trailing the PDC compact disc. This cutter penetration limiting diamond dome surface acts as an impact or shock absorber to minimize the impact damage to the PDC cutter when drilling laminated hard and soft rock formations.
申请公布号 CA2140828(C) 申请公布日期 1998.02.17
申请号 CA19952140828 申请日期 1995.01.23
申请人 SMITH INTERNATIONAL, INC. 发明人 AZAR, MICHAEL G.;WILLIS, SIMON N.
分类号 E21B10/56;E21B10/567;E21B10/573;(IPC1-7):E21B10/52 主分类号 E21B10/56
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