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. |
