The optimum range of hole size for blast hole drilling with DTH is 90 mm to 254 mm (3 ½”–10″). Smaller blast holes are generally drilled using tophammer, and larger holes generally use rotary machines.In other applications, like foundation drilling, DTH hammers can be used with single bit in hole sizes up to . 750 mm (30″). With multiple hammer units CD (Cluster drills) drill holes up to 70″ or 1778 mm.As a rule of thumb, the smallest hole diameter a DTH hammer can drill is its nominal size. A 4 inch hammer will drill a 4 inch (102 mm) hole. The limiting factor is the outside diameter of the hammer, because, as hole diameter reduces, airflow is restricted. Maximum hole size for production drilling is the nominal hammer size plus 1 inch, so for a 4 inch hammer the maximum hole size is 5 inch (127–130 mm).Choosing the right hammer is largely determined by hole size and type of rock formation. Ideally, the size of the hammer should match the required hole dimension as closely as possible, leaving just enough space for cuttings to evacuate the hole.- We are proudly partnered with Black Diamond Drilling Services Australia. Black Diamond's reverse circulation hammers are specifically designed for all kinds of exploration drilling (deep hole and in-pit grade control applications). Whether you are exploring potential sites or working an existing mine, the BDDRILL RC hammer will guarantee high performance, exceptional reliability and dependable support.
- Drill rod wipers, also known as drill pipe wipers or pipe cleaning wipers, are tools used in the oil and gas industry during drilling operations. They are designed to clean the outer surface of drill rods or pipes as they are being pulled out of a wellbore. The wipers are typically made of durable rubber or polyurethane materials and are shaped like cylindrical sleeves with a central hole that fits snugly around the drill pipe.
- Surface-set diamond drill bits are brazed with large grain diamonds, which have excellent penetration efficiency. Surface-set diamond bits are widely used in diamond exploration drilling due to their ability to efficiently penetrate hard rock formations and recover core samples for analysis.
- DHD340 valved drill bits are a type of down-the-hole (DTH) drill bit used for drilling blast holes in mining and quarrying operations. They are designed to work with DTH hammers and are typically used to drill holes in hard rock formations.
Benefits
Valved drill bits are equipped with valves that help to control the flow of air and cuttings through the bit. This helps to improve the drilling efficiency and reduces the amount of wear and tear on the bit.- Improved drilling efficiency: The valves help to control the flow of air and cuttings, which improves the drilling efficiency and reduces the amount of time it takes to drill a hole.
- Reduced wear and tear: The valves also help to protect the bit from wear and tear, which extends the life of the bit.
- Increased safety: Valved drill bits are designed to be more stable than other types of DTH drill bits, which can help to reduce the risk of accidents.
Applications
- Drilling blast holes for blasting operations: Valved drill bits are commonly used to drill blast holes for blasting operations in mining.
- Drilling exploratory holes for mineral exploration: Valved drill bits can also be used to drill exploratory holes for mineral exploration.
- Drilling holes for water wells and geothermal wells: Valved drill bits can be used to drill holes for water wells and geothermal wells.
- DHD340 drill bits are a type of down-the-hole (DTH) drill bit used for drilling blast holes in mining and quarrying operations.They are designed to work with DHD340 DTH hammers and are typically used to drill holes in hard rock formations.
Applications
- Drilling blast holes for blasting operations: DHD340 valved drill bits are commonly used to drill blast holes for blasting operations in mining.
- Drilling exploratory holes for mineral exploration: DHD340 valved drill bits can also be used to drill exploratory holes for mineral exploration.
- Drilling holes for water wells and geothermal wells: DHD340 valved drill bits can be used to drill holes for water wells and geothermal wells.
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Operation
DTH hammers work by using compressed air to drive a piston back and forth, which in turn strikes a bit that is attached to the end of the drill string. This creates a hammering action that breaks up the rock and allows the drill to penetrate deeper into the ground.Benefits
- Efficient: Can drill holes quickly and efficiently, even in hard rock formations.
- Powerful: Can deliver a lot of impact energy, which allows them to break up rock that would be difficult or impossible to drill with other methods.
- Versatile: Can be used to drill holes in a variety of rock formations, including hard rock, granite, and soft rock.
- Durable: Are built to withstand the rigors of mining and quarrying operations.
Applications
- Drilling blast holes for blasting operations
- Drilling exploratory holes for mineral exploration
- Drilling holes for water wells and geothermal wells
- Drilling holes for anchoring and foundation work
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Operation
DTH hammers work by using compressed air to drive a piston back and forth, which in turn strikes a bit that is attached to the end of the drill string. This creates a hammering action that breaks up the rock and allows the drill to penetrate deeper into the ground.Benefits
- Efficient: Can drill holes quickly and efficiently, even in hard rock formations.
- Powerful: Can deliver a lot of impact energy, which allows them to break up rock that would be difficult or impossible to drill with other methods.
- Versatile: Can be used to drill holes in a variety of rock formations, including hard rock, granite, and soft rock.
- Durable: Are built to withstand the rigors of mining and quarrying operations.
Applications
- Drilling blast holes for blasting operations
- Drilling exploratory holes for mineral exploration
- Drilling holes for water wells and geothermal wells
- Drilling holes for anchoring and foundation work
- Valved drill bits are a type of down-the-hole (DTH) drill bit used for drilling blast holes in mining and quarrying operations. They are designed to work with DTH hammers and are typically used to drill holes in hard rock formations.
Benefits
Valved drill bits are equipped with valves that help to control the flow of air and cuttings through the bit. This helps to improve the drilling efficiency and reduces the amount of wear and tear on the bit.- Improved drilling efficiency: The valves help to control the flow of air and cuttings, which improves the drilling efficiency and reduces the amount of time it takes to drill a hole.
- Reduced wear and tear: The valves also help to protect the bit from wear and tear, which extends the life of the bit.
- Increased safety: Valved drill bits are designed to be more stable than other types of DTH drill bits, which can help to reduce the risk of accidents.
Applications
- Drilling blast holes for blasting operations: Valved drill bits are commonly used to drill blast holes for blasting operations in mining.
- Drilling exploratory holes for mineral exploration: Valved drill bits can also be used to drill exploratory holes for mineral exploration.
- Drilling holes for water wells and geothermal wells: Valved drill bits can be used to drill holes for water wells and geothermal wells.
- Valved drill bits are a type of down-the-hole (DTH) drill bit used for drilling blast holes in mining and quarrying operations. They are designed to work with DTH hammers and are typically used to drill holes in hard rock formations.
Benefits
Valved drill bits are equipped with valves that help to control the flow of air and cuttings through the bit. This helps to improve the drilling efficiency and reduces the amount of wear and tear on the bit.- Improved drilling efficiency: The valves help to control the flow of air and cuttings, which improves the drilling efficiency and reduces the amount of time it takes to drill a hole.
- Reduced wear and tear: The valves also help to protect the bit from wear and tear, which extends the life of the bit.
- Increased safety: Valved drill bits are designed to be more stable than other types of DTH drill bits, which can help to reduce the risk of accidents.
Applications
- Drilling blast holes for blasting operations: Valved drill bits are commonly used to drill blast holes for blasting operations in mining.
- Drilling exploratory holes for mineral exploration: Valved drill bits can also be used to drill exploratory holes for mineral exploration.
- Drilling holes for water wells and geothermal wells: Valved drill bits can be used to drill holes for water wells and geothermal wells.
- Valved drill bits are a type of down-the-hole (DTH) drill bit used for drilling blast holes in mining and quarrying operations. They are designed to work with DTH hammers and are typically used to drill holes in hard rock formations.
Benefits
Valved drill bits are equipped with valves that help to control the flow of air and cuttings through the bit. This helps to improve the drilling efficiency and reduces the amount of wear and tear on the bit.- Improved drilling efficiency: The valves help to control the flow of air and cuttings, which improves the drilling efficiency and reduces the amount of time it takes to drill a hole.
- Reduced wear and tear: The valves also help to protect the bit from wear and tear, which extends the life of the bit.
- Increased safety: Valved drill bits are designed to be more stable than other types of DTH drill bits, which can help to reduce the risk of accidents.
Applications
- Drilling blast holes for blasting operations: Valved drill bits are commonly used to drill blast holes for blasting operations in mining.
- Drilling exploratory holes for mineral exploration: Valved drill bits can also be used to drill exploratory holes for mineral exploration.
- Drilling holes for water wells and geothermal wells: Valved drill bits can be used to drill holes for water wells and geothermal wells.
- Flat faced drill bits are a type of down-the-hole (DTH) drill bit used for drilling blast holes in mining and quarrying operations. They are designed to work with DTH hammers and are typically used to drill holes in hard rock formations.
Applications
- Drilling blast holes for blasting operations: Flat faced drill bits are commonly used to drill blast holes for blasting operations in mining.
- Drilling exploratory holes for mineral exploration: Flat faced drill bits can also be used to drill exploratory holes for mineral exploration.
- Drilling holes for water wells and geothermal wells: Flat faced drill bits can be used to drill holes for water wells and geothermal wells.
