| Patent Number |
Title Of Patent |
Date Issued |
| H1566 |
Matrix diamond drag bit with PCD cylindrical cutters |
August 6, 1996 |
| 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 |
| 5505273 |
Compound diamond cutter |
April 9, 1996 |
| 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 |
| 5383527 |
Asymmetrical PDC cutter |
January 24, 1995 |
| A polycrystalline diamond compact (PDC) drag bit cutter is disclosed that provides more clearance between the cutter's drilling edge and the drag bit body mounting blade. This allows for more efficient hydraulic cooling and cleaning of the cutters, thereby achieving faster drilling rates |
| 5363932 |
PDC drag bit with improved hydraulics |
November 15, 1994 |
| A drag bit for soft, sticky formations is disclosed with a new fluid dynamics control mechanism that minimizes "bit-balling". Multiple blades carrying PDC cutters have tapered back sides to achieve greater velocity through the fluid channels. Multiple jet nozzles in each fluid channel |
| 4981184 |
Diamond drag bit for soft formations |
January 1, 1991 |
| A drag bit for soft formation is disclosed which consists of a new cutting mechanism. The drag bit face forms one or more pairs of radially disposed ridges separated by a valley whereby a leading ridge supports multiple rounded projections and the following ridge supports multiple positi |
