Stainless Steel Core Tube
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WhatsApp: 8615515833787 WeChat: 15515833787Product Name: Stainless Steel Core Barrel Tubes & Matching Couplings
Material: 304 / 316L / 321 (High-quality stainless steel compliant with national geological exploration standards and international standards ASTM A511 and ASTM A519). Chromium content ≥10.5%. 316L contains additional molybdenum, offering superior resistance to chloride corrosion, making it ideal for high-corrosion and high-humidity working conditions.
Size: Outer Diameter × Wall Thickness × Length (Customizable; standard specifications available). Dimensional tolerances strictly follow GB 3423-82 standard for seamless steel tubes used in diamond core drilling. Outer diameter tolerance ≤ ±1%, wall thickness tolerance ≤ ±12%.
Connection Type: Threaded Connection / Flange Connection (Customizable according to project requirements). Threads are precision-machined using CNC equipment and compatible with API standard thread specifications. The connection is tight and well-sealed, effectively preventing drilling fluid leakage and the ingress of formation contaminants.
Packaging: Steel bundles or wooden cases (Export-standard packaging; fumigation service available). Additional anti-corrosion protective coating is applied to prevent surface oxidation of stainless steel during transportation, making it suitable for long-distance sea and land shipping.
Minimum Order Quantity (MOQ): 10 pieces
Delivery Time: 7–15 days (In-stock products: 3–7 days). Customized orders may vary depending on complexity. Urgent projects can be prioritized for expedited production.
Payment Terms: T/T (Telegraphic Transfer) / L/C (Letter of Credit) (Negotiable). We support international trade orders and can provide inspection reports and customs clearance documents that comply with international standards.
Widely used in geological surveying, mining exploration, hydrogeological investigation, offshore geological exploration, and chemical exploration, these products also support non-standard customization. Material grades and specifications can be optimized according to special geological conditions, such as highly corrosive formations or fractured rock formations, fully meeting the drilling requirements of different working environments.
Corrosion resistance, high strength, high precision, and excellent toughness, with a high core recovery rate. A dense chromium oxide passive film forms on the surface, providing strong resistance to moisture, acids, alkalis, and salt spray corrosion.
The inner wall is smooth and burr-free, making it less prone to scaling and buildup. The product is suitable for harsh working environments such as high-corrosion, high-humidity, and complex fractured formations, with a service life significantly longer than that of standard alloy steel core barrels.
|
Model |
Outer Diameter (mm) |
Wall Thickness (mm) |
Length (m) |
Application Scenarios |
|
Standard Model 1 |
73 |
4.5/6 |
0.5-6 |
Conventional Geological Exploration |
|
Standard Model 2 |
89 |
4.5/6 |
0.5-6 |
Conventional Geological Exploration |
|
Standard Model 3 |
108 |
4.5/6 |
0.5-6 |
Conventional Geological Exploration |
|
Standard Model 4 |
127 |
4.5/6 |
0.5-6 |
Conventional Geological Exploration |
|
Standard Model 5 |
146 |
4.5/6 |
0.5-6 |
Conventional Geological Exploration |
|
Standard Model 6 |
168 |
6 |
0.5-6 |
High-Corrosion Formation Exploration |
|
Customized Model |
Customizable |
Customizable |
Customizable |
Special Formations/Projects (e.g., Marine, Chemical Exploration) |
Seamless Precision Manufacturing:304 / 316L / 321 stainless steel with seamless structure and smooth inner wall to prevent core damage and improve recovery.
Strong Corrosion Resistance:Dense chromium oxide layer resists water, salt, chemicals, and seawater. 316L offers extra chloride resistance for marine and chemical environments.
Precise & Customizable:Standard sizes in stock with fast delivery. Custom OD, wall thickness, length, and threads available for different rigs.
Wide Applications:Suitable for geological, mining, deep-hole, offshore, and chemical drilling under harsh conditions.
International Quality:Produced under ISO 9001 standards with strict inspection and quality certification for every batch.
We support full-parameter customization, including stainless steel grades (304 / 316L / 321), outer diameter, wall thickness, length, and thread types. Products can be designed for special rigs and complex formations such as highly corrosive environments, fractured rock, hard rock, and deep coalbed methane exploration.
Professional consultation is available to optimize material selection based on application scenarios (e.g., 316L for high corrosion, thicker walls for hard rock). Bulk orders enjoy better pricing, and customized products can be supplied with dedicated inspection reports.
