PDC drill bit used for geological exploration, suitable for soft and medium‑hard formations.
The PDC step‑crown drill bit is designed for high‑efficiency drilling in formations ranging from soft to medium‑hard. The unique stepped crown design enhances cutting efficiency and reduces balling, ensuring smoother and faster drilling progress. Made with premium polycrystalline diamond cutting elements of the highest quality, this bit offers exceptional durability and wear resistance. Ideally suited for drilling oil, gas, geothermal, and water wells, it delivers reliable performance under challenging conditions. With its innovative design and superior quality, the PDC step‑crown bit maximises productivity and minimises downtime.
| Size | Thread Type (Pin) | Weight (lbs) |
|---|
| 3 7/8" – 4 3/4" | 2 3/8" REG Pin | 6 |
| 4 7/8" – 5 1/8" | 2 3/8" REG Pin | 7 |
| 5 1/4" – 5 1/2" | 2 3/8" REG Pin | 8 |
| 4 5/8" – 5" | 2 7/8" REG Pin | 10 |
| 5 1/8" – 5 1/2" | 2 7/8" REG Pin | 11 |
| 5 5/8" – 6 1/4" | 3 1/2" REG Pin | 18 |
| 6 1/2" – 6 3/4" | 3 1/2" REG Pin | 19 |
| 7" – 7 1/2" | 3 1/2" REG Pin | 21 |
| 7 5/8" – 8" – 12 1/4" | 3 1/2" REG Pin / 4 1/2" / 6 5/8" | 23 |
Three‑blade step drag bits are manufactured as a one‑piece alloy steel construction with tungsten carbide cutting tips and gauge‑protecting side surfaces for extended service life. They have 3 blades and 3 wash ports. Compared to 4‑blade designs, 3‑blade step drag bits generally drill faster and more aggressively, but have a shorter service life and are less durable. 3‑blade step drag bits generate greater cutting force than chevron‑type bits. When using step drag bits, the rotary table speed should be maintained between 60 and 80 rpm with a light weight‑on‑bit (WOB).
Three‑blade step drag bits are a cost‑effective drilling tool for soft geological formations at shallow depths; they are primarily intended for soft to medium‑hard formations such as clay, loam, silt, and most soft to medium‑hard soils with a certain moisture content, etc. Furthermore, step drag bits are recommended for drilling in mining, geological exploration, environmental applications, water well construction, geothermal systems, and similar projects.
3‑Wing Step Drag Bits
| Diameter | Thread |
|---|
| From 2 to 17½ inches (50.8 – 444.5 mm) | Optional (as required) |
Note: The diameters and threads listed above are standard sizes; other sizes are available upon request.
Thread sizes available:
2 3/8" REG, 2 7/8" REG, 3 1/2" REG, 4 1/2" REG, 6 5/8" REG, 2" API IF, 2 3/8" IF, 2 7/8" IF, A Rod, N Rod, AW, BW, NW, AWJ, BWJ, NWJ.
