Official Export Subsidiary of Kaishan Group (Est. 1956) | Quzhou Manufacturing Base
Our Quzhou engineering desk calculates the exact borehole diameter, rock hardness, and necessary CFM/Bar ratio for your project.
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Kaishan DTH Drilling Rigs
Heavy-duty surface crawlers and integrated rigs for open-pit mining, quarry blasting, and slope stabilization. High penetration rate and anti-jamming hydraulic system.
EQUIPMENT CATEGORIES
Precision-engineered fluid channels balance bottom-hole hydraulic flow, rapidly clearing rock flour to prevent bit balling in sticky mudstone and clay formations.
Reinforced with tungsten carbide inserts (TCI) and diamond-enhanced gauge cutters to maintain accurate borehole diameter and minimize outer taper wear.
All blade surfaces and junk slots are overlaid with high-grade tungsten carbide hardfacing to resist severe erosion and fluid cavitation in abrasive ground.
Configurable in single-row or double-row cutter layouts (06/08/13/16 mm) to maximize rate of penetration (ROP) and stability during reaming and coring.
| Parameter | Design & Manufacturing Options |
|---|---|
| Available Diameter Range | 2" to 17 1/2" standard (Custom sizes up to 28" available upon request) |
| Blade / Wing Configurations | 3, 4, 5, 6, 7, 8 Blades (Straight blade or spiral blade options) |
| Bit Body Construction | Matrix Body (M) or High-Strength Alloy Steel Body (S) |
| Series Classification | YHA Series (Super Strength), YHB Series (Reinforced), YHC Series (Standard) |
| PDC Cutter Sizes | ⌀06 mm, ⌀08 mm, ⌀13 mm, ⌀16 mm (Single or dual row layout) |
| Connection Threads | API Regular Pin/Box: 2 3/8", 2 7/8", 3 1/2", 4 1/2", 6 5/8", or custom threads |
| Applicable Formations | Soft, Medium-Soft, Medium, and Medium-Hard strata |
| Raw Materials | Structural Alloy Steel, Sintered Tungsten Carbide, Polycrystalline Diamond Compacts |
Machined from solid alloy steel bars. Provides larger chip evacuating junk slots, high impact toughness, and field repairability. Best suited for soft clay, shale, and high-speed ROP water well drilling.
Manufactured from sintered tungsten carbide matrix material. Offers extreme resistance to fluid body wash, erosion, and abrasive wear. Ideal for high-sand strata, abrasive sandstones, and deep geothermal boreholes.
A: 3-blade bits feature larger junk slots and fewer cutters, delivering maximum ROP in soft clay, sand, and unconsolidated layers; 4-blade and multi-blade bits distribute cutting torque more evenly, providing smoother rotation and longer gauge life in medium to harder formations.
A: 13 mm (1308) and 16 mm (1613) PDC cutters are the industry standards for water well and geothermal drilling, offering the ideal balance between aggressive rock shearing velocity and cutter impact durability.
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Founded in 2022 in Quzhou City, Zhejiang Province. Operating as the global integrated export arm of Kaishan Group, delivering heavy-duty DTH drill rigs, water well exploration machinery, and screw air compressors worldwide.
© 2026 Zhejiang Bili Machinery Co., Ltd. All rights reserved. A Kaishan Group Integrated Export Division.
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