| Type | D | H | h |
|---|---|---|---|
| SS1418-E20 | 14.30 | 18.00 | 8.10 |
| SS1620-E20 | 16.35 | 19.50 | 11.10 |
| SS2444-E22 | 24.37 | 44.00 | 22.00 |
1. Product Overview
Zhuzhou Jinzhou Carbide manufactures high-performance spoon-shaped tungsten carbide inserts, commonly known as “scoop teeth,” specifically engineered for tricone roller bits used in oil and gas drilling, geothermal exploration, and water well drilling. The spoon or scoop profile features a distinctive concave face with a sharp leading edge that aggressively gouges and scrapes soft rock materials as the bit rotates. This unique geometry is designed to maximize penetration rates in plastic, sticky, and unconsolidated formations where traditional spherical or conical buttons may struggle with “bit balling” (material packing around the cutting elements). The spoon-shaped insert efficiently scoops and displaces material, providing exceptional cleaning action and maintaining optimal cutting efficiency. Manufactured from premium tungsten carbide through advanced sintering technology, our spoon inserts deliver reliable performance, extended service life, and outstanding drilling speed in soft to medium-hard formations. They are widely used in oil and gas exploration, geothermal projects, and shallow water well drilling.
2. Key Features
Aggressive Scooping Action: Concave spoon face with sharp leading edge delivers efficient gouging and scraping for maximum penetration in soft and plastic formations.
Superior Anti-Balling Design: The scoop shape promotes effective self-cleaning, preventing material packing and maintaining consistent cutting performance.
High Penetration Rates: Optimized cutting geometry achieves faster drilling speeds compared to conventional button profiles in soft rock conditions.
Excellent Wear Resistance: Premium tungsten carbide composition ensures long service life even in abrasive soft rock such as sandstone and sandy shale.
Impact Toughness: Engineered with appropriate cobalt content to withstand shock loads encountered during rapid drilling through variable formations.
Efficient Chip Removal: The concave face directs cuttings away from the cutting zone, reducing friction and improving drilling efficiency.
100% In-House Quality Control: Every batch undergoes comprehensive testing for hardness, density, and dimensional accuracy.
Customizable Options: Available in multiple sizes, spoon depths, and carbide grades to match specific bit designs and drilling parameters.
3. Specifications
| Parameter | Details |
|---|---|
| Material | Tungsten Carbide (WC-Co) |
| Insert Shape | Spoon / Scoop Profile |
| Face Type | Concave with sharp or chamfered leading edge |
| Width Range | 8 mm – 18 mm |
| Height Range | 12 mm – 25 mm |
| Length Range | 14 mm – 28 mm |
| Spoon Depth | 1.0 mm – 4.0 mm (customizable) |
| Leading Edge Radius | R0.3 mm – R1.5 mm (sharp or rounded) |
| Tolerance | ±0.05 mm |
| Hardness (HRA) | 88.0 – 89.5 (grade dependent) |
| Density (g/cm³) | 14.5 – 15.0 (grade dependent) |
| TRS (Transverse Rupture Strength) | 2,200 – 2,700 N/mm² |
| Sintering Technology | Vacuum Sintering + HIP (Hot Isostatic Pressing) available |
4. Carbide Grade Selection Guide
| Grade | ISO Code | Cobalt Content (%) | Hardness (HRA) | Density (g/cm³) | TRS (N/mm²) | Best Application |
|---|---|---|---|---|---|---|
| YG6 | K10-K20 | 6.0 | 89.0 – 89.5 | 14.9 – 15.2 | ≥ 2,200 | Soft, non-abrasive formations (clay, chalk, gypsum), maximum wear resistance |
| YG8 | K20-K30 | 8.0 | 88.5 – 89.0 | 14.7 – 14.9 | ≥ 2,500 | Soft to medium formations with moderate abrasiveness (shale, soft limestone, sandstone), balanced performance |
| YG10C | K25-K35 | 10.0 | 88.0 – 88.5 | 14.5 – 14.7 | ≥ 2,700 | Medium-hard with abrasive inclusions, higher impact resistance for variable formations |
Note: Custom grades with specific cobalt content, grain size, and spoon geometry can be developed upon request to suit unique drilling conditions and formation types.
5. Applications
Oil & Gas Drilling: Tricone bits for shallow to medium-depth exploration and production wells in soft to medium-hard sedimentary formations.
Geothermal Exploration: Drilling through clay, shale, and soft rock formations for geothermal energy projects.
Water Well Drilling: Penetrating soft and unconsolidated formations for groundwater exploration and supply.
Mineral Exploration: Soft rock drilling for mineral exploration and sampling.
Coal Bed Methane: Drilling through soft sedimentary formations for coal bed methane extraction.
Environmental & Geotechnical Drilling: Site investigation, soil sampling, and foundation drilling in soft formations.
Construction & Civil Engineering: Drilling for utility lines, anchors, and shallow foundations in soft ground conditions.
