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DTH Drilling Rig

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China DTH Drilling Rig Manufacturers Factory Suppliers

We specialize in producing all kinds of DTH Drilling Rig products, mainly truck-mounted coal bed methane multi-function drill rig, crawlers type coal bed methane multi-function drill rig, diesel-electric dth drilling rig, overhead dth drilling rig, boom-type down-the-hole drilling rig, etc.
As one of the premier enterprises, we specialize in the provision of top-tier dry mining machinery equipment and comprehensive maintenance services, as well as offering a robust selection of wear-resistant materials tailored for the mining industry. Our portfolio of innovative solutions and expert services has yielded outstanding outcomes in Angola's challenging mining landscape. This success has positioned us as a go-to partner for mining operations across the continent.

 

 

Company Advantages
 
 

Large Scale

We have more than 1500 square meters workshop, with a fully automatic CNC production line, and are committed to providing customers with the best products and services.

 
 

Well-Experienced

We were established in 2017, with more than 7 years of manufacturing experience, can provide customers with perfect solutions.

 
 

Affordable Price

You can get our catalog online or visit our factory to see our products. We also provide competitive price and excellent customer service for all our customers. We also can offer different discounts based on your order quantity. Our pricing policies are designed to offer affordable options while not compromising on quality.

 
 

Fast Delivery

On average, a quote will be submitted in 24 hours. The parts are shipped within 7 days or less, and our delivery time and quality rate has reached 99%. Large amounts of raw materials and advanced technology allow us to quickly meet the needs of wholesale orders and reduce customers' waiting time.

 
 

24-hour Online Customer Service

Our customer service is available online 24 hours a day. After receiving the service information or feedback from the customer, we will reply and address the feedback in the shortest time. We have an experienced and professional customer support team to provide flexible service to customers around the world, giving full support from product design to marketing.

 
 

Professional Team

We have hundreds of professional and technical personnel, and we can provide you with professional services. Professional engineers also can provide expertise consultations and professional advice on product selection, design, installation, and maintenance.

 
 

Advanced Production Equipment

We are a full-service company providing complete design, R&D, production and sales services. Our production workshop is equipped with the most advanced equipment. We have hundreds of professional and technical personnel, and we can provide you with professional services.

 
 

A Global Supply Chain

We are present globally, backed by local customer service, and a strong sales representatives network. Our logistic hubs with large storage capacities located close to our customer facilities (Europe, Americas, Asia Pacific) ensure short time deliveries.

 

Introduction to DTH Drilling Rig

 

 

A DTH drilling rig is a percussive rotary drilling rig. Its internal structure is different from general rock drilling rigs. Its gas distribution and piston reciprocating mechanism are independent. The front end is directly connected to the drill bit, and the back end is connected to the drill rod. When rock drilling, the impactor dives into the hole, and the piston (hammer) in the impactor reciprocates to strike the shank through the gas distribution device (valve) so that the drill bit impacts the rock at the bottom of the hole. The high-speed rotation of the impactor in the hole is realized by a motor or a wind-driven rotating device outside the hole through a drill rod connected to the rear end of the impactor. The cuttings produced during the rock drilling process are flushed out of the hole by a mixture of wind and water. The mixed gas is injected into the impactor through the center of the drill rod by the powder discharge mechanism, and then enters the bottom of the hole through the air groove on the impactor cylinder.

 

Advantages of DTH Drilling Rig
1

Down-The-Hole Hammer: DTH drilling rigs utilize a down-the-hole hammer that is mounted directly above the drill bit. This hammer delivers powerful, direct impact to the drill bit for efficient rock penetration.

2

High Penetration Rates: DTH drilling rigs are known for their high penetration rates in hard rock formations. The impact force generated by the hammer facilitates faster drilling compared to other methods.

3

Versatility: DTH drilling rigs are versatile and suitable for a wide range of drilling applications. They can adapt to different geological conditions and are effective in various industries.

4

Depth Capability: DTH drilling rigs can achieve significant drilling depths, making them suitable for both shallow and deep drilling projects. The depth capability depends on the specific rig model and drilling conditions.

5

Precise Hole Diameter: DTH drilling rigs provide precise control over hole diameter, making them suitable for applications where specific hole sizes are required, such as in mining and blasting operations.

6

Mobility: Many DTH drilling rigs are designed for ease of mobility, allowing them to be transported to different job sites efficiently. This mobility is essential for projects with varying drilling requirements.

7

Robust Construction:DTH drilling rigs are built with robust and durable components to withstand the harsh conditions of drilling in hard rock formations. This ensures longevity and reliability in demanding environments.

8

Efficient Waste Removal:DTH drilling rigs are equipped with efficient mechanisms for removing drill cuttings from the borehole. This feature contributes to continuous drilling without interruptions.

9

Operational Safety: DTH drilling rigs are designed with safety features to protect operators and ensure safe drilling operations. This includes features like dust control and noise reduction measures.

10

Adaptability To Various Drilling Tools: DTH drilling rigs can accommodate various drilling tools and accessories, allowing for flexibility in choosing the right equipment for specific drilling tasks.

 

Types of DTH Drilling Rig
 

Truck-mounted Coal Bed Methane Multi-function Drill Rig
A truck-mounted coal bed methane (CBM) multi-function drill rig is a specialized piece of equipment that extracts methane gas from coal seams. CBM is a natural gas that is trapped in coal seams during the geologic process of converting plant material into coal. CBM operators extract methane by drilling wells into coal seams and pumping out groundwater.
Truck-mounted Coal Bed Methane Multi-function Drill Rigs are designed for specific drilling environments. The main working parts of the rig are integrated into the chassis of the vehicle, making installation and transportation easy.

 

Overhead DTH Drilling Rig
An overhead DTH drilling rig is a jackhammer that is attached to the bottom of a drill string. The rig uses a hammer at the bottom of the drill rod, which is mounted on the drill bit. Compressed air activates the hammer, which simultaneously rotates and impacts the ground. The fast hammer action breaks hard rock into small cuttings and dust that are then evacuated by a fluid.

 

Diesel-electric DTH Drilling Rig
A diesel-electric DTH drilling rig can be powered by diesel, electric, or hydraulic power.
Diesel-electric DTH Drilling Rig options also include an air compressor, a mud pump, drilling rods of various sizes, connectors, and a drilling tower. Drilling is done using drill bits of various shapes, sizes, and compositions. You can choose between diamond bits, alloy ring-shaped bits, 3-wing alloy bits, PDC bits, and hammer bits. Each drill bit uses different drilling methods, including rotary, percussion, blast hole, and core drilling.

 

Applications of DTH Drilling Rig

Mining: DTH drilling rigs are extensively used in the mining industry for various applications, including exploration drilling, production drilling, and blasting in hard rock mines. They are crucial for extracting minerals and ores efficiently.

 

Quarrying: In quarrying operations, DTH drilling rigs are employed for drilling blast holes, extracting stone blocks, and shaping rock surfaces. The precision and efficiency of DTH drilling make it suitable for quarry applications.

 

Construction: DTH drilling rigs are used in construction projects for tasks such as foundation drilling, piling, and anchoring. They can efficiently penetrate hard rock or compacted soil, providing a reliable method for creating boreholes.

 

Water Well Drilling: DTH drilling rigs are utilized in water well drilling projects, especially in regions with hard or rocky subsurface conditions. These rigs can efficiently penetrate through various geological formations to access water sources.

 

Geotechnical Exploration: DTH drilling rigs are employed in geotechnical investigations for soil and rock sampling. They play a crucial role in collecting samples for analyzing subsurface conditions and determining the suitability of the ground for construction projects.

 

Oil And Gas Exploration: DTH drilling rigs are used in oil and gas exploration for drilling boreholes to assess subsurface formations and locate potential hydrocarbon deposits. They are particularly effective in hard rock formations.

 

Foundation Engineering: DTH drilling rigs are used in foundation engineering for creating boreholes for soil investigation and in-situ testing. They help engineers understand the geological conditions for designing stable foundations.

 

Environmental Monitoring: DTH drilling rigs are employed in environmental monitoring projects to collect soil and rock samples for assessing the impact of various pollutants and contaminants in the ground.

 

 

Maintenance Tips for DTH Drilling Rig

 

 

Regularly check the hydraulic oil in the DTH drilling machine:
The DTH drilling equipment is a semi-hydraulic vehicle, that is, except for the use of compressed air for impact, the rest of the functions are realized by the hydraulic system, so the quality of the hydraulic oil is crucial to the normal operation of the hydraulic system.

  • Open the hydraulic oil tank to see if the color of the hydraulic oil is clear and transparent. If it is emulsified or deteriorated, it should be replaced immediately. If the drill rig is used more often, the hydraulic oil should generally be replaced every six months. It is forbidden to mix the two hydraulic oils!
  • The hydraulic oil for the DTH drilling rig is anti-wear hydraulic oil, which contains antioxidants, anti-rust agents and anti-foaming agents, which can effectively prevent the early wear of hydraulic components such as oil pumps and hydraulic motors.

Clean the oil tank and oil filter of DTH drilling machine regularly:
Impurities in the hydraulic oil will not only cause the failure of hydraulic valves, but also aggravate the wear of hydraulic components such as oil pumps and hydraulic motors. Therefore, we have set up an oil suction filter and an oil return filter in the structure to ensure the cycle in the system is clean.
Clean the oil mist device of DTH drilling machine and add lubricating oil in time:
Because the compressed air often contains moisture and the pipeline is not cleaned, a certain amount of moisture and impurities often remain at the bottom of the lubricator after a period of use, which will affect the lubrication and life of the impactor, so when it is found that the lubricator doesn't oil or there is moisture and impurities in the oil outlet or the lubricator, remove them in time. The DTH drill rig uses an impactor to achieve impact drilling. Good lubrication is a necessary prerequisite to ensure the normal operation of the impactor. When adding lubricating oil, you must first close the main intake valve, and then open the impact air valve to remove the remaining air in the pipe to avoid injury.
Be careful about the diesel engine running-in and oil replacement:
Diesel engine is the source power of the entire hydraulic system. It directly affects the climbing ability, propulsion (lift) force, rotary torque, and drilling efficiency of the drill rig. Timely maintenance is the prerequisite for the best efficiency of the drill rig.

 

Our Factory

We have more than 15,000 square meters of workshop and we have 850 staff members, with a fully automatic CNC production line, and are committed to providing customers with the best products and services.

 

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Frequently Asked Questions

Q: How to maintain the drill pipe of DTH Drilling Rig?

A: 1. Regular Cleaning: After each use, it is important to clean the drill pipes thoroughly. Use a soft cloth or brush to gently wipe the surface of the drill pipes, especially the tool joints. Remove any accumulated mud, oil, or other debris to prevent corrosion and wear.
2. Inspection and Replacement of Damaged Parts: Regularly inspect all components of the drill pipes, particularly the tool joints, casing, and connection threads. If any signs of wear, cracks, or damage are detected, promptly replace the affected parts. Clearly mark and separate the damaged drill pipes to prevent their accidental use.
3. Use Suitable Lubricants: Before using drill pipes, ensure the application of appropriate lubricants that are compatible with the pipe material and working conditions. Apply an adequate amount of lubricant evenly to reduce friction and wear, thus prolonging the lifespan of the drill pipes.
4. Avoid Over-Torquing: When connecting and disassembling drill pipes, avoid using excessive force and torque. Use wrenches or torque wrenches correctly and apply the recommended torque as per the manufacturer's guidelines to prevent damage to the threads and connection components.
5. Proper Storage: Store drill pipes in a dry, clean, and well-ventilated area when not in use. Avoid contact with moisture, acidic substances, or corrosive materials to prevent corrosion and damage to the drill pipes.
6. Regular Inspection: Conduct regular comprehensive inspections of the drill pipes to ensure there are no hidden cracks or other damages. Utilise professional equipment such as ultrasonic or magnetic particle testing to perform non-destructive testing of the drill pipes. Early detection of potential issues allows for timely actions and preventive measures.

Q: What are drilling rigs used for?

A: A drilling rig is a machine that makes holes in the earth's surface. The drilling rigs can be very big structures that hold equipment that is used to make water wells, natural gas extraction wells, or oil wells.
There are many different types of drilling rigs. The drilling rig that is used is dependent on the specific requirements needed for the drilling site. Here are a few different kinds of drilling rigs.

Q: What are the advantages of DTH Drilling Rig?

A: Down-the-hole (DTH) drilling rigs have many advantages, including:
Deep drilling: DTH drilling is effective for drilling at significant depths.
Precision: DTH drilling is accurate and reliable, with minimal deviation.
Hard rock drilling: DTH drilling rigs can adapt to hard rock and rock formation conditions.
Efficient: DTH drilling rigs are highly efficient in hard rock drilling.
Stable structure: DTH drilling rigs have a stable and reliable structure.
Fast feeding: DTH drilling rigs have a unique sliding seat and propulsion design that ensures straightness while fast feeding.
Rapid change of drill pipe: DTH drilling rigs have an easy unloading drill pipe device that reduces the labor intensity of workers.
Flushing: DTH drilling rigs use pressurized air for slag flushing, and sometimes air foam for special applications.
Hole accuracy: DTH drilling rigs have a constant energy directly behind bit that provides speed with less power loss and greater hole accuracy.
Hole alignment: DTH drilling rigs have a rigid drill string that improves hole alignment.
Air flow: DTH drilling rigs have an air flow volume that provides efficient flushing and cleaner holes.

Q: How does DTH Drilling Rig work?

A: DTH Drilling Rig uses a mini air or water driven hammer at the end of the drill string. With DTH hammer you can drive down casings or drill rock holes. A rotation unit is part of the drill rig. Air or water are introduced through the drill casing to the drill hammer to drive the piston that strikes the drill bit into the material.

Q: Why Choose DTH Drilling Rig?

A: DTH Drilling Rig has the advantage that the force of the percussion, the active strike on the material, hits directly on the drill bit. Which prevents energy loss through a long drill string. This enables efficient drilling regardless of depth. Which we usually describe saying the hammer doesn't know how deep it is drilling. Using DTH drilling, you can drill a hole several kilometers down.

Q: What are the precautions for operating DTH Drilling Rig?

A: 1. Before use, check the flexibility of the air motor, remove obstacles in the working range of the DTH drilling machine and on the road, and check the passing capacity of the road.
2. Before the operation, check the drilling tool, propulsion mechanism, electrical system, compressor system, air duct, and dustproof device, etc., and confirm that they are in good condition before use.
3. During operation, the vacuum cleaner of the DTH rig machine should be started first, and the sound of the impactor and mechanical operation should be observed at any time. If any abnormality is found, it should be shut down immediately for inspection and troubleshooting.
4. When drilling, sufficient water should be given to reduce dust flying. During the operation, the powder discharge situation should be observed at any time, especially when drilling down the hole, the blowing should be strengthened, and the drilling should be strengthened if necessary.
5. During drilling, do not reverse the motor or rotary reducer, and avoid tripping of the drill pipe.
6. Before adding the drill pipe, the center hole of the drill pipe should be blown clean to prevent dirt from entering the impactor. Do not use drill rods that do not meet specifications or are severely worn. Drill rods that are broken in the hole should be taken out with special tools.
7. When the drilling rig stops working for a short time, a small amount of compressed air should be supplied to prevent rock dust from invading the impactor; if the drilling is stopped for a long time, the impactor should be lifted 1~2m from the bottom of the hole and fixed.
8. The blunt bit should be replaced immediately, and the diameter of the replaced bit shall not be larger than the diameter of the original bit.
9. When drilling, if the drill rod is not advancing and jumping, the impactor should be pulled out of the hole for inspection; when the drill bit is found to fall off the cemented carbide piece, compressed air should be used to force the small pieces to blow out. Block fragments can use rods smaller than the hole diameter, and use yellow mud or asphalt to stick the alloy pieces out of the hole.
10. When the sticking occurs, the shaft thrust should be reduced immediately, and the rotation and flushing should be strengthened to make it gradually normal. If the drill is severely stuck, you must stop the machine immediately, apply torque and tension to the tool to loosen the rotation of the drill, and then lift the drill while supplying air until it returns to normal.
11. In normal operation, when the air pressure is lower than 0.35MPa, stop the DTH drilling machine for inspection.
12. The tightness of the steel wire rope of the propulsion machine should be adjusted frequently, and the reliability of the upper and lower travel switches of the lifting pulley block should be adjusted; if the correct action cannot be performed, it should be repaired in time.
13. During operation, the lubrication of moving parts should be checked at any time, and there must be no shortage of oil.
14. When the drilling rig is displaced, the carriage and the drill boom should be adjusted to maintain the balance of the DTH drilling machine body.

Q: What are the Drilling Rig Accessories?

A: According to the different requirements of each process in the drilling rig process, a set of rig machine parts must consist of the following systems and equipments:
1. Drilling Tool Lifting System: The drilling tool lifting system mainly includes the main winch, auxiliary winch, auxiliary brakes, travelling systems (including wire ropes, crane travelling pulleys and rotary hooks), and the derricks of the suspension moving systems. In addition, there are tools and equipment used for lifting and the tripping (lifting rings, elevators, slips, tongs and pole moving mechanisms, etc.)
2. Power System: The power system is used to drive the utilities equipment such as winches, air compressors, and turntables. Based on the different drive types, the power system generally includes the diesel engines and AC motors.
3. Rotary Drilling System: In order to rotate the drilling tool in the well to continuously break the rock, the drilling rig is equipped with a turntable and a tap. Besides, it is equipped with the drill column and a drill bit under the well. In addition, the directional well needs to be equipped with underground power drilling tools, which constitutes a rotary drilling system.
4. Drilling Medium Circulation System: The drilling medium circulation system includes drilling pump, air compressor, ground high-pressure manifold, drilling medium purification and control equipment.
5. Control System: In aim of coordinating the various systems of the drilling rig, the drilling rig is equipped with various control equipments such as gas control, hydraulic control, mechanical control, and electric control, as well as a centralized control station and display instrument for various parameters.
6. Transmission System: The main task of the transmission system is to transmit and distribute the power to the working units such as winch, drilling pumps, air compressors, and drill disks. At the same time, it has deceleration, parallel operation, reversing, and other functions.
7. Rig Substructure: One of the components of the drilling rig is rig structure, including the base of the drill floor, the base of the machine room, and the base of the drilling pump. The base of the wheeled water well drilling rig is the chassis of the car or tractor; the base of the crawler water well drilling is the chassis of the crawler. The rig substructure is mainly used to install drilling equipment to ensure the safe, reliable, and normal operation of the well drill.

Q: What are the disadvantages of DTH Drilling Rig?

A: Down-the-hole (DTH) drilling has several disadvantages, including:
Cost: DTH is more expensive than cable tool and percussion drilling.
Not suitable for hard rock formations: DTH drilling is not suitable for hard rock formations.
Inefficient: DTH drilling uses small diameter holes, which can be inefficient.
Dangerous: DTH drilling can be dangerous because of flying rock.
Wastes gas: DTH drilling wastes the gas generated by the air.
Affects drilling efficiency: DTH drilling seriously affects the efficiency of slagging and drilling.

Q: What fields is DTH Drilling Rig suitable for?

A: DTH drilling rigs are used in many fields, including: Metallurgy, Mining, Railway, Hydropower engineering, National defense construction.

Q: What diameter do you drill for DTH?

A: The optimum range of hole size for DTH drilling is 90 mm (3.5”) to 254 mm (10”).

Q: What is the difference between Rotary and DTH?

A: Rotary achieves high rate of penetration (ROP) on the soft formation. DTH achieves higher ROP on the medium to hard rock formations. Rotary is offering lower total drilling cost per bank cubic meters (BCM) by rock hardness based on the mines surveyed in this report.

As one of the leading dth drilling rig manufacturers in China, we warmly welcome you to wholesale discount dth drilling rig for sale here and get quotation from our factory. All customized products are with high quality and competitive price.

Boom type Down the hole Drilling Rig, DTH Drilling Rig, Drilling Rigs