Five-Wing Concave PDC Drag Bit for Soft to Medium Hard Formations with Multiple Interlayers
The five-wing concave PDC drag bit is specifically engineered for soft to medium hard formations (F<8) with multiple soft-hard interlayers. Featuring a symmetrical five-wing concave structure and premium PDC cutters, it delivers ultimate drilling stability, strong impact resistance, and high-precision hole formation, enabling continuous long-distance drilling in complex conditions while significantly reducing bit changes, deviation correction, and downtime costs.
Extensively used in deep anchor holes, high-precision grouting holes, complex formation gas drainage holes, slope reinforcement, long-distance water wells, shallow geothermal drilling, and other projects requiring exceptional stability and hole quality.
Core Advantages
Ultimate Hole Accuracy & Stability
Five-wing symmetrical distribution with concave structure minimizes radial vibration, providing superior hole verticality, roundness, and wall smoothness far exceeding three-wing and four-wing bits. Perfect for deep anchor holes and high-precision grouting applications, effectively reducing hole deviation and correction costs.
Strong Impact Resistance & Formation Adaptability
Five-wing design evenly distributes cutting loads, providing excellent adaptability to formations with multiple soft-hard interlayers and local hard spots. Effectively buffers impact loads, reducing blade fracture and PDC cutter breakage risks, ensuring stable operation in complex conditions.
Efficient Center Rock Breaking
Concave blade design allows center PDC cutters to contact formation first, enhancing center rock breaking capability and avoiding drilling resistance caused by “center blank”. Provides faster penetration rate and more stable footage in soft to medium hard formations with interlayers.
Smooth Cuttings Removal & Anti-Balling
Concave cavity combined with large cuttings grooves and optimized hydraulic channels allows cuttings to be quickly removed with circulating fluid, reducing accumulation and blockage, significantly minimizing bit balling and sticking risks, ensuring continuous efficient drilling.
Wear-Resistant & Extended Service Life
Premium PDC cutters with even distribution and concave protective structure ensure balanced force on blades and reduced wear rate per wing. Under similar complex conditions, offers longer footage and superior service life compared to three-wing and four-wing concave bits, with lower cost per meter drilled.
Wide Compatibility & Fully Customizable
Covers multiple standard sizes with fully customizable thread types, cutter density, concave depth, and blade structure. Can be optimized for complex formations to meet personalized requirements of different drilling rigs and construction scenarios.
Applications
Suitable Formations
Red sandstone, mudstone, coal seam, shale, limestone, marble, and other soft to medium hard formations.
Specifically designed for complex formations with multiple soft-hard interlayers and local hard spots.
Not recommended for extremely hard or highly abrasive formations such as granite or basalt.
Drilling Method
Rotary Drilling – Recommended to use with mud circulation or water circulation for efficient bit cooling and cuttings removal, improving drilling stability and extending bit life in complex formations.
Product Specifications
Standard Bit Diameter (mm)
- 153 / 171 / 200 / 220
- 245 / 275 / 300 / 325
- Custom diameters and concave depth available
Thread Types
- REG: 2 3/8, 2 7/8, 3 1/2, 4 1/2
- NC: NC23, NC26, NC31, NC38
- Other: Z-50, Custom Threads
Customization Services
If your drill pipe thread is not listed above, simply provide thread parameters or drawings for a fully customized connection solution. We can also adjust cutter density, concave depth, and blade structure based on formation complexity (such as number of interlayers and hardness) to optimize impact resistance, rock breaking, and cuttings removal performance.
Our Manufacturing Excellence
From precision machining to final assembly — every drill bit is crafted in our ISO 9001 certified facility.
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