Diamond Core Barrel Inner Tube
Model No.: HWF, PWF, SWF, ZWF, UWF
HS Code: 84314320
Diamond core barrels are essential tools in drilling operations, particularly for extracting rock cores. These barrels come in different types, including single tube, double tube, and triple tube configurations, each designed for specific applications.
**Double Tube Core Barrels**
Double tube core barrels are widely used in both surface and underground mining, as well as geotechnical drilling. They feature an inner and outer tube, allowing for efficient core retrieval and minimizing damage to the core. Some of the most commonly used models include:
- **TT Series Core Barrel**: Ultra-thin walled barrels available in 46mm and 56mm diameters. Ideal for hard formations due to their very thin cutting face, which allows for fast penetration. Suitable for underground mining applications.
- **T2 Series Double Tube Core Barrels**: Thin-walled barrels used for surface exploration, especially in mining. Available in sizes ranging from 46mm to 101mm. Their thin kerf design enables rapid penetration.
- **T6 Series Double Tube Core Barrels**: A more robust version of the T2 series, available in larger diameters (76mm to 146mm). Used in surface mining and geotechnical drilling.
- **LTK 48 & LTK 60 Double Tube Core Barrels**: Thinner than the T2 series, offering cost-effective and high-production performance for medium to very hard rock formations. Available in 48mm and 60mm sizes.
- **WF Series Double Tube Core Barrels**: Designed for soft formations using face-discharge bits. More durable than thin-wall barrels but with a slower penetration rate.
- **WG Series Double Tube Core Barrels**: Include single tube options, available in DCDMA sizes E, A, B, N, and H.
- **TBW and TNW Core Barrels**: Similar to the T2 series but with DCDMA hole sizes B and N. Used for surface exploration, especially in mining. The thin kerf allows for quick penetration.
- **Wireline Double Tube Core Barrels**: Used for deep coring, featuring an overshot device that eliminates the need to couple and uncouple the rod string during core retrieval. Available in DCDMA sizes A, B, N, H, and P.
- **Chinese Standard Double Tube Core Barrels**: Conform to Chinese industry standards, suitable for various drilling applications.
- **Chinese Standard Wireline Double Tube Core Barrels**: Designed for wireline operations under Chinese standards.
- **Jet-type Reverse Circulation Double Tube Core Barrels**: Utilize reverse circulation for efficient core recovery, especially in challenging conditions.
**Triple Tube Core Barrels**
Triple tube core barrels are typically used in geotechnical drilling, where maximizing core recovery is critical. They consist of three tubes, allowing for better protection of the core during extraction.
- **MLC (Triefus) Series Core Barrels**: Designed for soft formations, these barrels maximize core recovery. Available in sizes from 35mm to 146mm.
- **Wireline Triple Tube Core Barrels**: Used in broken or fractured formations, they incorporate a third split inner tube that can be pumped out after retrieval, preserving the core’s in-situ condition for detailed analysis.
Here is a comparison of core barrel types:
| Wireline Core Barrel | Double Tube Core Barrel |
|----------------------|--------------------------|
| Single Tube Core Barrel | Triple Tube Core Barrel |
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