NWL Impregnated Reaming Shell
NWL Impregnated Reaming Shell
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The NWL reaming shell is a tool used in diamond core drilling operations to enlarge the diameter of a borehole after the initial pilot hole has been drilled. NWL refers to "Narrow Quarter," indicating a core size with a diameter of approximately 1.875 inches or 47.6 millimetres.
The reaming shell is typically attached to the outer end of the core barrel assembly, just above the core bit. It is cylindrical in shape and has a larger diameter than the core bit, allowing it to remove additional material from the surrounding rock or formation as the drilling process continues.
The primary purpose of the NWL reaming shell is to smooth and enlarge the borehole, ensuring that subsequent core samples can be retrieved with ease and accuracy. It helps to create a clean and well-defined borehole by removing any irregularities or obstructions left by the initial drilling process.
The NWL reaming shell features diamond-impregnated or polycrystalline diamond compact (PDC) cutting elements embedded on its outer surface. These cutting elements are highly durable and can effectively grind away the rock or formation as the reaming shell rotates during drilling.
As the drilling progresses, the NWL reaming shell removes material from the borehole walls, gradually increasing the diameter to the desired size. The reaming action creates a smoother and more uniform borehole, facilitating the insertion and extraction of subsequent core barrels.
The NWL reaming shell is available in various sizes to match the specific core barrel and drilling equipment being used. It is essential to ensure compatibility between the reaming shell size and the corresponding core bit and core barrel for effective operation.
NWL Core Barrel
An NWL core barrel consists of several components, including an outer tube, inner tube, and a core lifter. The core lifter is a critical part that helps extract the core sample from the geological formation. The inner tube is used to collect the core sample, while the outer tube provides protection to the core during drilling and retrieval. NWL core barrels are standardized to specific dimensions and are typically designated as having a diameter of 2.125 inches (54 millimeters).
This size is widely recognized in the drilling industry, making NWL core barrels compatible with a range of drilling equipment and systems. NWL core barrels are commonly used in mineral exploration, environmental studies, and geotechnical drilling. They are suitable for drilling in a variety of formations, including soft to medium hardness materials, where a 2.125-inch core sample is sufficient for analysis.
Our Core Barrel Components
Our Core Barrel Accessories is a comprehensive collection of specialized tools and components designed to enhance and optimize the core barrel drilling process. Developed by industry experts with extensive knowledge in core sampling and exploration, these accessories offer practical solutions to overcome challenges and maximize efficiency in various geological and mining applications.