Reduced drilling time minimal core loss impregnated Diamond Core Bit
Rock Type |
Rock Hardness |
Abrasiveness |
Hardness NO. |
Clay,Shale,Ash Stone,Gypsum,Tuff,Serpentinite,Calcite, Coal,Argillite,Volcanics,Sandly Pebble |
Soft |
Medium |
BST 1/3 |
Sandstone,Lithoid Limestone, Limonite |
Medium Soft |
Very High |
BST 3/5 |
Medium Hard Sandstone,Hard Shale, Hard Ash Stone,Dolomitic,Marble,Hard Schist, Hard Streak Stone,Siltstone,Andestite |
Medium |
High |
BST 5/7 |
Peridotite,Gneiss,Limonite | Medium Hard |
Medium High |
BST 7/9 |
Pegmatite,Schist,Norite,Syenite,Gabbro,Peridotite, Grandiorite,Granite,Basalt,Hard Streak Stone |
Hard |
Medium To Low |
BST 9/11 |
Amphibolite,Diorite,Rhyolite,Quartzite | Very Hard | Medium To Low | BST 11 |
Silicious,Hard Sandstone,Rhyolite, Dense Quartzite,Ironstone,Taconite,Jasperite,Chert |
Utral Hard |
Low |
BST 14 |
Impregnated diamond core bits differ from other types of core bits in terms of their composition and cutting mechanism. Here are the key differences:
Composition: Impregnated diamond core bits consist of a metal matrix with synthetic diamonds embedded throughout the matrix. The diamonds act as the cutting medium, while the matrix provides structural support. In contrast, other types of core bits, such as surface-set and natural diamond core bits, have diamonds attached to the bit's surface using different methods, such as electroplating or sintering.
Cutting Mechanism: Impregnated diamond core bits have a grinding or shearing action. As the bit rotates, the embedded diamonds grind or shear through the rock formation, creating a hole. This cutting mechanism is highly effective for hard rock formations. In comparison, other core bits may have a crushing or scraping action, where the diamonds on the surface crush or scrape the rock to create the hole.
Versatility: Impregnated diamond core bits are highly versatile and can be used to drill through various rock types, including hard and abrasive formations. They offer excellent performance in a wide range of geological conditions. Other core bits may be more specialized for specific rock types or drilling conditions, such as soft formations or highly fractured rocks.
Durability: Impregnated diamond core bits are known for their durability and long lifespan. The diamonds embedded in the metal matrix provide excellent abrasion resistance, allowing the bit to maintain cutting efficiency over an extended period of drilling. Other core bits may have shorter lifespans, especially when drilling through hard or abrasive formations.
Core Recovery: Impregnated diamond core bits are designed for high core recovery. The grinding or shearing action of the diamonds ensures that the core sample remains intact and is extracted smoothly. Other core bits, especially those with a crushing action, may result in lower core recovery or core loss during the drilling process.
Customization: Impregnated diamond core bits offer customization options to optimize performance for specific drilling requirements. Factors such as bit diameter, diamond concentration, spacing, and matrix composition can be tailored according to the drilling conditions and rock formations. Other types of core bits may have limited customization options.
Cost: Impregnated diamond core bits are typically more expensive than other types of core bits. The use of synthetic diamonds and the manufacturing process involved contribute to their higher cost. However, their durability and versatility often offset the initial investment by providing longer tool life and improved drilling efficiency.
It's important to consider the specific drilling requirements, rock formations, and budget constraints when selecting the most suitable core bit for a given drilling project. Impregnated diamond core bits excel in drilling through hard and abrasive formations, offering durability, versatility, and high core recovery rates.