What This Product Does
The 1305 convex PDC cutters are 13.05mm diameter diamond composite inserts with a convex dome-shaped working surface, manufactured for oil and gas well drill bit construction. The smaller 13.05mm diameter allows higher cutter density on the bit face compared to standard 13.44mm or 16mm cutters, enabling more cutting elements in a tighter arrangement on small to medium-diameter oilfield bits. The convex table concentrates cutting force for higher point loading, making these cutters effective in medium to medium-hard formations where the bit needs to maintain penetration through gradually hardening rock.
Key Features & Technical Specifications
Cutter diameter: 13.05mm. Table geometry: convex with 0.8-1mm dome height standard.
Diamond layer thickness: 1.0-1.2mm.
Substrate: tungsten carbide with 6%-8% cobalt.
Hardness: HRA >80+ on diamond face.
Thermal stability: up to 700 degrees C.
Impact resistance: rated for medium impact applications (suitable for rotary drilling with moderate weight on bit).
Braze interface: standard planar for conventional brazing onto steel or matrix bit bodies. Available in natural and thermally stable grades
Performance Advantages
The 1305 diameter allows 15-20% more cutters per square centimeter of bit face area compared to 16mm cutters, which increases total cutting length and improves rate of penetration in medium formations at equivalent weight on bit. The convex table generates 20-25% higher contact stress than a flat table at the same WOB, enabling the cutter to initiate fractures in formations approaching 80 MPa that would cause flat cutters to polish. In laboratory testing, 1305 convex cutters on a 6-inch core bit achieved 12% higher ROP in medium-hard limestone compared to the same bit fitted with flat-table 1305 cutters, while maintaining equivalent cutter wear rates.
Application Scenarios
Oil and gas well PDC bit construction for 6-8 inch diameter bits in medium-depth wells. Cutter replacement during bit repair and refurbishment programs. Bit manufacturing for onshore drilling service companies. For larger-diameter cutters suited to bigger bit sizes and higher impact conditions, the 1313 customized convex PDC Cutters drill bit Inserts for coal mining provides 1313 customized convex cutters with adjustable dome height for coal mining and oilfield dual-use applications. Geothermal well bit construction in medium-hard formations.
Problem-Solving Capabilities
In medium-depth oil wells (1,500-3,000m), the intermediate section often transitions from soft shale into progressively harder limestone and dolomite. Standard flat cutters on PDC bits begin to polish rather than cut as the formation hardness increases past 60 MPa, causing ROP to drop steadily and eventually triggering a trip for bit change before the planned depth. The 1305 convex cutter's concentrated point loading maintains fracture initiation at higher hardness values, delaying the onset of cutter polishing and extending the effective depth range of each bit run. A bit service company in Texas reported that replacing flat-table 1305 cutters with convex 1305 cutters on their 6-inch bits extended average bit runs by 180m in the 60-80 MPa transition zone, eliminating one trip per three-well program.
Technical Support & Customization
SUNGOOD TECH can supply thermally stable grade 1305 convex cutters for wells with bottomhole temperatures exceeding 350 degrees C. Custom dome heights from 0.3 to 0.6mm for specific formation profiles. Bulk pricing for bit manufacturers with regular procurement schedules. Technical data sheets with braze parameters and handling procedures available on request.
Factory sales 1305 Convex PDC Cutters Diamond Inserts/ Blades
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