ZZBETTER DTH drilling tools
The DTH drilling tools produced by company include two series of high wind pressure and low wind pressure. The shape of crown is mainly two-airfoil or multi-airfoil, and the end surface design mainly includes planar and concave-convex surfaces,
Among them, the planar structure can make maximum use of the cutting surface; the convex face is self-repairing and stable, and has greater impact on the formation, which is suitable for hard rock; the concave side has a good anti-skew effect.
DTH Drilling Bits
Head shape: planar, concave, convex
Cutter type: dome cutter, parabolic cutter, bullet cutter, sharp cutter
| No. | Diameter (mm) | Button profile | Gauge button | Front buttons | Button angle | No. of Flushing holes Dia. |
| (no.*mm) | ||||||
| ZD45A-Φ115 | Φ115 | PDC Dome cutters | 7*Φ16 | 6*Φ14 | 38° | 2*Φ18 |
| ZD45A-Φ140 | Φ140 | 8*Φ16 | 7*Φ14 | 2*Φ20 | ||
| ZD55A-Φ152 | Φ152 | 8*Φ18 | 8*Φ15 | 2*Φ20 | ||
| ZD65A-Φ165 | Φ165 | 8*Φ18 | 8*Φ16 | 2*Φ22 | ||
| ZD65A-Φ178 | Φ178 | 8*Φ18 | 6*Φ16 | 2*Φ26 | ||
| ZD65A-Φ190 | Φ190 | 10*Φ18 | 8*Φ16 | 2*Φ26 | ||
| ZD85A-Φ203 | Φ203 | 10*Φ18 | 8*Φ16 | 2*Φ30 | ||
| ZD85A-Φ245 | Φ245 | 12*Φ19 | 12*Φ16 | 2*Φ30 |
Reverse Circulation Bits
The center sinking type drilling bit is mainly used to deal with special geology such as loose soil, hard rock, and underground water content.
| Bit shank | Hole size (mm) | Pressure (MPa) | Speed (r/min) | Shape | Spline | Button type |
| RE004 | 112-127 | 1.2-2.5 | 30-60 | Center sinking type | 8 | Dome cutters |
| RE542 | 113-130 | 1.2-2.5 | ||||
| PR52 | 130-146 | 1.5-3.0 | ||||
| PR54R | 135-150 | 1.5-3.0 |
PDC dome cutter bits in the gravel field, footage of more than 1200 meters, real image wear status.
Use cases
ZZbetter diamond DTH bit is applied to a gravel field, drilling into granite formations. The average footage of the carbide DTH hammer is 100-150 meters, and the average footage of the diamond DTH hammer is 1200 meters, which is 5-10 times that of the carbide DTH hammer. The efficiency is improved by 30% -40% compared to the carbide DTH bit, and the comprehensive cost-effectiveness advantage is outstanding.
On the same drill bit, the ZD series and ordinary series have cutters arranged, and it can be seen that the ordinary series has cutters chipping and break-age, resulting in less wear and tear; The ZD series has no cutter breakage and obvious wear.
