Unlike coring bits, which retrieve core samples for analysis, non-coring bits are designed for full-hole drilling operations where no core sample is collected. This makes them ideal for projects focused on rapid penetration, such as in mineral and geotechnical exploration. Non-coring drilling can reduce the high time cost of lifting and lowering work required for coring, thereby increasing the net drilling time, improving the drilling efficiency and reducing the drilling costs [1].
What Are Non-Coring Bits and How Do They Work
Non-coring bits are specialized drilling tools used in full-hole drilling operations, where the primary goal is to create a borehole without collecting a core sample. Like core bits, these products are offered with three different types of cutting media. The cutting media selection is dependent on the type of formation that is being drilled. 【2】 Non-coring bit applications include (but are not limited to):
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Full-Hole Drilling: This is the standard mode for creating open boreholes for various purposes, such as geotechnical site characterization, installing monitoring wells, or drilling blast holes in mining operations.
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Directional (Steerable) Drilling: In modern drilling, navigating a predetermined subsurface path is crucial for reaching targeted deposits or for horizontal drilling. Non-coring bits are a key component in the Bottom Hole Assembly (BHA) for directional drilling projects, where their performance directly affects steering capability and wellbore quality.
Diamond Impregnated Non-Coring Bits
Within the non-coring bit category, diamond impregnated non-coring bits are considered to be the first choice for a wide variety of full hole drilling operations. These bits feature a matrix that can be tailored to formations ranging from medium-soft and abrasive to hard and non-abrasive, providing exceptional adaptability.【3】
Key technical features include:
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Typically, these bits are used for either directional (steerable) drilling operations or for full hole drilling where a core sample is not required.
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Typical hole sizes covered: from A-size (Ø 48 mm / 1.875 inch) to P-size (Ø 123 mm / 4.828 inch).
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Supplied with industry standard thread connections (though custom threads may be offered depending on customer needs).
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Standard bits designs feature a V-shaped annular profile. Drill face flushing is achieved through a face discharge channel that directs flow into multiple large waterways, though customization is available to meet specific customer requirements.
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The gauge diameter setting on these bits is comprised of a combination of thermally stable polycrystalline (TSP) synthetic diamond elements and tungsten-carbide wear pads.
Therefore, this not only extends tool life but also reduces the force required to drill through materials, enabling faster machining speeds, lower energy consumption, and reduced heat generation. Consequently, it is highly suitable for full-hole drilling operations, thereby minimizing the risk of cracking or other damage.
Applications and Benefits
Non-coring bits are indispensable in geological exploration due to their ability to accelerate drilling processes without the need for sample retrieval. Non-coring Bits drill only in rotation, without percussion, guaranteeing greater straightness of the hole and a cost advantage, since compressed air is not needed.【4】
At ROCKCODE, we have integrated these insights into our product development (e.g. N DHM S16). Our non-coring bits are engineered to deliver high penetration rates and long service life, reducing the total cost of ownership for our clients.
Why Choose ROCKCODE
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Premium Raw Materials: ROCKCODE sources tungsten powders and synthetic diamonds from global leaders. This ensures consistent quality and reliable performance from the very beginning stage.
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Rich Manufacturing Experience: With over 10 years of production and extensive geological exploration data, ROCKCODE continuously refines its formulations and processes. Improved production efficiency also enables ROCKCODE to provide high-quality non-coring bits with greater cost-effectiveness.
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Custom Design Capability: Our technical team can independently design and customize non-coring bits to meet specific geological formations and client requirements, delivering tailored drilling solutions.
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Technical Consultation: ROCKCODE is pleased to provide professional advice on bit selection, application, and drilling optimization to help you improve efficiency and reduce operational costs.
→ For more information about ROCKCODE’s Non-coring Bits, please visit: https://www.rockcodebit.com/non-coring-bit.html
→ Email us at: info@rockcodebit.com
→ Information in this article is for general reference only. For specific drilling projects and drilling bits, please consult qualified professionals. Thank you.
Source
1. Wear law and design of assembling diamond bit based on finite element analysis. Coal Geology & Exploration, 51(9), 164-170
2. https://www.dimatec.com/drilling-products/non-coring-bits/
3. https://www.dimatec.com/drilling-products/non-coring-bits/non-coring-diamond-impregnated/