- info@wescoz.com
- +86-186 8479 9057
A PDC bit (Polycrystalline Diamond Compact bit) is a fixed-cutter drilling tool widely used in HDD and directional drilling applications. Unlike roller cone bits, PDC bits use synthetic diamond cutters to shear through rock formations efficiently, delivering faster drilling speeds and longer service life.
PDC bits are widely preferred in directional drilling because they offer excellent steering capability, low vibration, and high drilling efficiency in suitable ground conditions.
PDC bits for HDD perform best in the following formations:
As a robust HDD rock reamer, the Wescoz Welded Hole Opener is engineered for maximum structural integrity during borehole enlargement. Its full-welded construction ensures the tricone cutters remain securely fixed under the extreme torque and vibration encountered in hard rock formations such as shale, granite, and limestone.
After pilot drilling, horizontal hole openers—especially tricone hole opener bits—are used to enlarge the borehole step by step. Designed for demanding rock formations, these hole opener bits deliver efficient cutting performance, reduced torque, improved stability, and reliable bore enlargement during HDD and trenchless drilling operations.
The Wescoz Bolt-on Hole Opener is designed for flexibility, easy maintenance, and reliable performance in demanding HDD applications. Its modular bolt-on structure allows quick replacement of roller bits on site, helping reduce downtime and maintenance costs during drilling operations.
Replaceable roller bits for fast and convenient on-site maintenance
Flexible cutter configuration for different geological formations
Consistent and stable drilling performance during long HDD projects
Reduced maintenance time and improved operational efficiency
Long-distance HDD drilling projects
Mixed, variable, or unknown ground formations
Projects where minimizing downtime is critical
Operations requiring quick cutter replacement and easier maintenance
The Wescoz Welded Hole Opener features an integrated full-welded structure designed for maximum strength, durability, and stability in demanding HDD drilling applications. Built for heavy-duty borehole enlargement, it delivers reliable performance in hard and consistent rock formations.
Choosing the right hole opener can be challenging, especially in hard rock and complex ground conditions where drilling performance, stability, and tool durability are critical.
For a more detailed selection guide, read our article on optimal HDD hole opener selection for hard rock and complex ground conditions, where we discuss formation matching, cutter selection, drilling strategies, and key factors for improving drilling efficiency and reducing operational costs.
| OD Size | Roller Bit Size Recommended | Rollers No. Recommended |
|---|---|---|
| 8” (203mm) | 5-7/8” | 3 |
| 10” (254mm) | 6” | 3 |
| 12” (305mm) | 8-1/2” | 3 |
| 14” (356mm) | 8-1/2” | 3 |
| 16” (406mm) | 8-1/2” | 4 |
| 18” (457mm) | 8-1/2” | 5 |
| 20” (508mm) | 8-1/2” | 5 |
| 22” (559mm) | 8-1/2” | 6 |
| 24” (610mm) | 8-1/2” | 7 |
| 26” (660mm) | 12-1/4” | 5 |
| 28” (711mm) | 12-1/4” | 5 |
| 30” (762mm) | 12-1/4” | 6 |
| 32” (813mm) | 12-1/4” | 7 |
| 34” (864mm) | 12-1/4” | 7 |
| 36” (914mm) | 12-1/4” | 8 |
| 38” (965mm) | 12-1/4” | 8 |
| 40” (1016mm) | 12-1/4” | 9 |
Free samples, product catalog, and expert consultation available.
