. Product Overview

The 1308 special-shaped PDC (Polycrystalline Diamond Compact) cutter is a high-performance cutting element engineered for demanding drilling applications. Featuring a 13mm nominal diameter and 8mm height, this cutter integrates an advanced non-planar diamond cutting edge with a robust tungsten carbide substrate. Manufactured through high-temperature high-pressure (HTHP) sintering technology, the 1308 special-shaped PDC cutter delivers exceptional durability, impact resistance, and rock-breaking efficiency — making it the preferred choice for oil and gas drilling, geological exploration, and mining operations.

Unlike conventional cylindrical PDC cutters that rely on a single shear-failure mechanism, the special-shaped variant employs a tensile-shear combined rock-breaking mechanism. This innovative approach significantly increases rock removal volume per revolution while reducing the mechanical specific energy (MSE) required for penetration, resulting in faster drilling speeds and lower operational costs.

2. Key Features of ZZSEGU brand PDC cutters

2.1 Advanced Non-Planar Cutting Edge

The 1308 special-shaped cutter features an innovative non-planar geometry — including ridge-shaped, chisel-shaped, and axe-shaped profiles. This unique cutting edge profile creates multiple contact points with the rock, inducing tensile stress zones that facilitate more efficient rock fragmentation compared to traditional flat-faced cutters.

2.2 Premium Polycrystalline Diamond Layer

A polycrystalline diamond layer (2.0–2.8mm thickness) is sintered onto a tungsten carbide substrate under ultra-high pressure and temperature conditions. This ensures exceptional hardness (approaching that of natural diamond), superior wear resistance, and reliable thermal stability up to 750°C in inert atmospheres.

2.3 Optimized Interface Bonding Technology

An advanced interfacial design between the PCD layer and carbide substrate improves stress distribution across the bonding surface. This engineered interface creates a firm and steady bond that resists delamination under extreme drilling conditions, including high-impact loads and thermal cycling.

2.4 Precision CNC Machining

Each cutter undergoes precision CNC milling and polishing to achieve tight dimensional tolerances and an optimal surface finish. This ensures consistent cutting performance and facilitates secure brazing onto drill bit bodies.

3. Technical Specifications

4. Product Characteristics

4.1 Tensile-Shear Combined Rock-Breaking Mechanism

The defining characteristic of the special-shaped PDC cutter is its tensile-shear combined rock-breaking mechanism. The non-planar cutting edge generates tensile stress concentrations in the rock ahead of the cutter, exploiting the fact that rock tensile strength is typically only 10–20% of its compressive strength. This mechanism produces larger rock cuttings and more efficient volume removal, directly reducing the mechanical specific energy (MSE) required for drilling.

4.2 Enhanced Cutting Stability

The non-planar geometry produces lower force fluctuations during cutting operations. The special-shaped profile distributes cutting forces more evenly across the cutter face, reducing harmful vibration and stick-slip phenomena. This enhanced stability protects both the cutter and the drill bit, extending overall service life and improving borehole quality.

4.3 Superior Thermal Management

The optimized cutting profile reduces frictional heat generation at the rock-cutter interface by promoting efficient chip flow and reducing contact area. This minimizes thermal damage to the diamond layer and maintains cutting efficiency in high-temperature downhole environments where conventional cutters may experience graphitization and rapid wear.

4.4 Customizable Geometry

The 1308 special-shaped PDC cutter is available in multiple profile configurations — including ridge-shaped (single, double, or triple ridge), chisel-shaped, and axe-shaped designs. This versatility allows drill bit designers to optimize cutter selection based on formation properties, drilling parameters, and specific well objectives.

5. Advantages

• Higher Drilling Efficiency: The tensile-shear rock-breaking mechanism achieves greater rock removal volume per revolution, significantly increasing the rate of penetration (ROP) compared to conventional cylindrical cutters.
• Extended Service Life: The premium diamond layer and optimized interface bonding deliver superior wear resistance and impact toughness, reducing cutter replacement frequency and tripping operations.
• Reduced Mechanical Specific Energy: Lower MSE translates to reduced power consumption, less wear on drilling equipment, and lower overall operating costs.
• Superior Hard-Rock Performance: The special-shaped geometry excels in hard, abrasive, and interbedded formations where conventional cutters experience rapid degradation and low drilling efficiency.
• Improved Borehole Quality: Stable cutting action produces cleaner, smoother boreholes with reduced wellbore instability risks, benefiting subsequent casing and cementing operations.
• Versatile Profile Options: Multiple special-shaped profiles accommodate various formation types and drilling parameters, enabling customized drill bit designs for specific well conditions.
• Cost-Effective Operation: Longer cutter life combined with higher drilling efficiency reduces the number of round trips, lowering overall drilling cost per meter.

6. Applications

6.1 Oil and Gas Drilling

The 1308 special-shaped PDC cutter is ideally suited for PDC drill bits used in oil and gas well drilling, particularly in medium-hard to hard formations. It excels in deep well and ultra-deep well applications where conventional cutters face rapid wear, low penetration rates, and frequent bit trips. The cutter is especially effective in hard sandstone, limestone, and dolomite formations with high compressive strength and abrasiveness.

6.2 Geological Exploration

Effective in geological core drilling and exploration boreholes, the cutter provides reliable performance across diverse rock formations. Its efficient rock-breaking mechanism ensures high core recovery rates and consistent drilling progress in varying geological conditions.

6.3 Coal Mining

Widely used in coal mine drilling operations for gas drainage, water injection, and exploration boreholes. The cutter delivers consistent performance in coal measure strata, where it efficiently penetrates interbedded coal, shale, and sandstone sequences.

6.4 Water Well Drilling

Suitable for water well construction in various geological conditions, offering long-lasting cutting performance and reduced maintenance requirements. The cutter's durability minimizes downtime in remote drilling locations where equipment servicing is costly.

6.5 Mining and Tunneling

Applied in mining drilling and tunneling operations where hard rock penetration and cutter durability are critical for project economics. The special-shaped cutter's impact resistance and wear properties make it suitable for the demanding conditions encountered in underground mining and construction.

Related Products : 1308 Decobalt super hard PDC Cutters well drilling bits diamond inserts

    Zhengzhou Sungood New Material Technology Co., Ltd.(SUNGOOD TECH) has been developing new products mainly based on diamond composite materials and efficiently producing the following drilling tools:
 ※ PDC cutting tools/blades: 1304, 1305, 1306, 1308, 1310, 1313, 1613, 1616, 1913... petroleum or mining types. ※ PDC core drill bits: diameter 46mm, 50mm, 55mm, 60mm, 65mm, 75mm, 89mm, 94mm, 98mm,113mm, 124mm, 127mm, 132mm, 146mm, 153mm, 190mm, 216mm，....... 
※ PDC non core drill bits: including arc angle drill bits, flat top drill bits, and concave drill bits, providing products of any size from 50mm to 300mm. According to your needs, you can produce products such as two wings, three wings, and four wings.

© 2026 Zhengzhou Sungood New Materials Technology Co., Ltd. | www.zzsungood.com | Technical data compiled from customer post-run reports, and published engineering references. No operational guarantee implied.