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Changsha Mingyi Machinery Equipment Co., Ltd. is proud to present our premium Hard Rock Core Barrel with Carbide Teeth, specifically engineered for rotary drilling rigs in bored pile foundation projects. Designed to tackle the most demanding hard rock formations, this core barrel combines exceptional wear resistance with efficient coring performance, ensuring reliable operation on your construction site. Our expertise in manufacturing drilling tools guarantees consistent quality and durability, making this core barrel a trusted choice for foundation engineers worldwide.
Key Features & Advantages
- Carbide Teeth Cutting Structure – Premium tungsten carbide inserts provide superior hardness and abrasion resistance, enabling penetration through hard rock (up to 250 MPa compressive strength) with minimal wear.
- Robust Barrel Construction – Manufactured from high-strength alloy steel, the barrel body withstands high torque and impact loads during rotary drilling, reducing the risk of deformation or breakage.
- Optimized Core Recovery – The core lifter and internal geometry are designed to maximize sample recovery even in fractured or highly abrasive rock, critical for geotechnical analysis and pile foundation quality control.
- Versatile Compatibility – Available with standard API threads or custom box-pin connections to fit most rotary drilling rigs. Custom lengths and diameters can be supplied to match your project requirements.
- Enhanced Durability – Optional hardfacing and anti-corrosion coatings extend service life in harsh drilling environments, reducing downtime and replacement costs.
Technical Specifications
| Parameter | Value |
|---|---|
| Standard Diameter (mm) | 89, 108, 127, 146, 168, 219 (others available on request) |
| Standard Length (m) | 1.5, 2.0, 3.0 (custom lengths up to 6m) |
| Teeth Material | Tungsten carbide (grade YG8, YG11, or equivalent) |
| Connection Thread | API 2-3/8 IF, 2-7/8 IF, 3-1/2 IF (or custom) |
| Max Rock Compressive Strength | 250 MPa |
| Weight per Unit (approx.) | 50–200 kg depending on size |
Benefits for Bored Pile Foundation Projects
- Higher Drilling Efficiency – Carbide teeth cut through hard rock faster than conventional steel-tooth core barrels, reducing drilling time and project costs.
- Improved Core Quality – The barrel's design minimizes core disturbance, providing undisturbed samples for accurate soil/rock classification and pile design.
- Reduced Maintenance – Durable materials and optional wear-resistant treatments lower the frequency of tooth replacement and barrel repair.
- Customizable for Site Conditions – We can adjust tooth spacing, angle, and barrel dimensions to match specific rock types (granite, basalt, limestone, etc.).
Why Choose Changsha Mingyi Machinery Equipment Co., Ltd.?
Based in Changsha, Hunan, China – a regional hub for drilling equipment manufacturing – our company has dedicated resources to produce high-quality core barrels for domestic and international clients. We maintain strict quality control during raw material sourcing, machining, welding, and heat treatment. Every product is inspected before shipment to ensure dimensional accuracy and structural integrity. Our team of experienced engineers is available to provide technical support and customized solutions. We have supplied core barrels to projects in Southeast Asia, Africa, and the Middle East, earning recognition for reliable performance. We invite you to contact us for a quotation or to discuss your specific drilling requirements.
Frequently Asked Questions (FAQ)
Q1: What is the typical lifespan of the carbide teeth on this core barrel?
A1: Lifespan depends on rock hardness and drilling parameters. In moderate hard rock (150-200 MPa), the teeth can last 50-100 meters of drilling before requiring replacement. In extremely hard rock, replacement intervals may be shorter. We offer replaceable teeth for easy maintenance.
Q2: Can this core barrel be used with a water or mud circulation system?
A2: Yes, the barrel is designed with circulation ports to allow water or drilling mud to flush cuttings and cool the teeth. This improves cutting efficiency and core recovery in most rock types.
Q3: Do you offer custom diameters and lengths for special projects?
A3: Absolutely. We can manufacture core barrels with non-standard diameters from 75mm to 300mm, and lengths up to 6 meters. Please provide your connection thread specifications or we can recommend suitable options.
Q4: Is the core barrel compatible with all rotary drilling rig brands?
A4: Yes, as long as the rig uses a standard drive system (e.g., top drive or rotary table) and compatible thread. We can supply adapters or custom connections to fit Bauer, Soilmec, Mait, Casagrande, and other common rigs.
Q5: What kind of rock formations is this core barrel best suited for?
A5: It is optimized for hard rock such as granite, basalt, quartzite, and strong limestone. For softer formations (clay, sand, shale), we recommend a different tooth configuration or a standard core barrel without carbide teeth.
Q6: What is the lead time for an order?
A6: For standard sizes (e.g., 108mm x 2m), lead time is typically 7-15 working days after confirmation of order and payment. Custom orders may require 15-25 working days.
Q7: Do you provide a warranty?
A7: Yes, we offer a 12-month warranty against manufacturing defects under normal operating conditions. Warranty does not cover wear and tear of carbide teeth or damage due to misuse.
Q8: How should I maintain the core barrel after use?
A8: Clean the barrel and teeth thoroughly to remove debris. Inspect for worn or broken teeth and replace as needed. Apply anti-rust oil to the threaded connections. Store in a dry, ventilated area.
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