The PQ core drilling rig, commonly known as a PQ core drilling machine or PQ-type coring rig, is a drilling device specifically designed for core sampling and geological exploration. It represents a high-end sub-model of core drilling rigs. Its core function is to accurately obtain underground rock samples in geological exploration and mining scenarios, providing reliable data support for engineering design and resource assessment. It is often used in conjunction with the NQ core drilling rig to meet drilling needs at different depths and in different rock formations. In terms of appearance, the PQ core drilling rig has a compact overall structure with an integrated design, maximizing its footprint for easy transportation and on-site installation, making it suitable for complex outdoor construction environments. The body uses an industrial-grade wear-resistant coating, effectively preventing corrosion and wear, extending the equipment’s service life. The control panel is simple and clear, with a logical button layout, allowing operators to learn quickly after simple training, lowering the barrier to entry. Contact us now to learn more about our products.
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YG Full Hydraulic Core Drilling Rig Technical Parameter
| Model | YGX-400 | YGX-600 | YGX-800 | YGX-1000 |
| Drilling Depth(M) | 180-400-500 | 200-600-650 | 400-800-1000 | 500-1000-1100 |
| Rated pressure(MPA) | 21 | 21 | 25 | 28 |
| Rated Flow(L/min) | 168 | 192 | 260 | 300 |
| Heat Dissipation Mode | Air cooling+water cooling | |||
| Engine Brand | Yuchai | Yuchai | Yuchai | Cummins |
| Rated power/speed | 78kW/ 2400r/min | 92kW/ 2400r/min | 92kW/ 2400r/min | 154kW/2400r/min |
| Drilling Angle(°) | 0-90 | 45-90 | 45-90 | 45-90 |
| Lifting Force(T) | 12 | 16 | 24 | 30 |
| Feed Force(T) | 6 | 8 | 12 | 15 |
| Hydraulic Mud pump flow | 30-90（L/min） | 30-90（L/min） | 90-180（L/min） | 90-180（L/min） |
| Hydraulic Mud pump power | 4-7(MPA) | 4-7(MPA) | 4-7(MPA) | 4-7(MPA) |
| Dimension | 4000*1900*1800mm | 4000*2000*1800mm | 5500*2100*2000mm | 6000*2200*2400mm |
| Weight | 4.3T | 4.5/5.5T | 6.5T | 7.5T |
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7 Core Features of the YG PQ Core Drilling Rig
- High-Efficiency Drilling and Precise Core Sampling: Equipped with a diamond composite drill bit and a high-power hydraulic drive system, and utilizing the full hydraulic control technology of full hydraulic core drilling rigs, the drilling speed can reach 10-15 m/h. The core diameter is 122 mm (PQ specification), with a core integrity of ≥95%, enabling precise acquisition of underground rock samples, reducing sampling errors, and providing reliable data for geological exploration.
- Compact Structure and Easy Mobility: The machine features a compact design, occupying only 3.5m × 2.2m × 2.8m. Its lightweight design allows for transport by ordinary trucks, and on-site installation is simple, requiring only 1-2 people to complete installation and commissioning. It is suitable for construction scenarios with inconvenient transportation, such as mountainous areas and mining areas, offering far greater mobility than ordinary core drilling rigs.
- Durable and robust, suitable for complex rock formations: The machine body is made of high-strength steel, and the drill pipe and drill bit are made of high-quality wear-resistant materials, making it suitable for various hard rock formations such as granite, basalt, and sandstone. Drilling depths can reach 500m, with long continuous operating time and over 800 hours of trouble-free operation, reducing equipment maintenance frequency.
- Intelligent control and easy operation: Equipped with a digital control system, it can display drilling depth, speed, pressure, and other parameters in real time, supporting precise speed adjustment and fixed-depth drilling. Operators do not require specialized skills and can be trained quickly, reducing labor costs and minimizing operational errors.
- Energy-saving and environmentally friendly, low operating costs: Utilizing an energy-saving hydraulic system, energy consumption is 20%-30% lower than that of ordinary core drilling rigs, effectively reducing fuel consumption. Wear parts (drill bit, seals) are easy to replace, resulting in low maintenance costs and eliminating the need for professional maintenance personnel, further reducing operating costs.
- Versatile and Flexible: It can be equipped with different specifications of drill pipes and drill bits to meet various construction needs, including PQ and NQ core sampling, satisfying the operational requirements of geological exploration, mining, and construction surveying.
- Safe and Reliable with Comprehensive Protection: Equipped with emergency stop buttons, overload protection, anti-detachment devices, dust covers, and other safety facilities, it effectively prevents equipment failures and safety hazards during drilling, ensuring the personal safety of operators and complying with international industrial safety standards.
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What Projects Are Suitable for PQ Drilling Rigs? When Should They Be Used?
PQ drilling rigs are not a panacea; they have their most suitable applications. When should PQ rigs be used? Here are a few situations:
- First, detailed exploration and survey stages. In the preliminary survey stage, NQ rigs are sufficient, mainly for quickly delineating ore bodies. In the detailed exploration stage, accurate reserve calculations are required, demanding high-quality core samples. At this time, PQ rigs are used. Large-diameter cores are more representative, resulting in more accurate test data.
- Second, projects requiring geotechnical mechanics tests. Measuring the compressive and shear strength of rocks requires large rock samples. NQ cores are too fine for these tests; PQ rigs must be used.
- Third, deep holes with thick overburden and unstable borehole walls. Using PQ rigs with coarse casing during the initial drilling can protect unstable strata and prevent borehole collapse. Smaller diameter casings can then be used for further drilling, providing a higher safety factor.
- Fourth, special mineral types. Some mineral types have uneven grades, requiring large sample volumes for accurate evaluation. For example, in gold and platinum mines, NQ cores may not yield representative samples, necessitating the use of PQ cores.
- Fifth, scientific drilling. Scientific drilling and geothermal exploration projects require studying the microstructure of rocks, fracture development, and fluid transport, demanding high core integrity; PQ is the preferred choice in these cases.
YG’s PQ drilling rig series offers models for shallow to deep holes, and for soft to hard rock. Tell a YG engineer your project requirements, and we will recommend the most suitable configuration.
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Can PQ and NQ Drilling Rigs Use the Same Main Unit?
Many customers ask: If I buy a drilling rig, can I drill both PQ and NQ rigs? The answer is yes, but several conditions must be met.
- First, the through-hole of the power head must be large enough. The outer diameter of a PQ drill pipe is 114 mm, so the through-hole diameter of the power head must be at least 120 mm to pass through. Many medium-sized drilling rigs on the market only have through-holes of around 90 mm, which can only accommodate NQ drill pipes, not PQ. This parameter must be carefully checked when selecting a drilling rig.
- Second, the chuck must be interchangeable. PQ drill pipes are thicker, so the jaws of the chuck must be correspondingly larger. A good drilling rig’s chuck allows for quick module changes; use a larger jaw for PQ drilling and a smaller jaw for NQ drilling, changing in just a few minutes.
- Third, the mud pump flow rate must be sufficient. PQ drill holes have larger diameters, requiring a larger volume of mud. If the mud pump flow rate is insufficient, rock powder cannot be carried out, the bottom of the hole will be unclean, and drilling efficiency will be low. Generally, PQ drilling requires a mud pump with a flow rate of 150-200 liters per minute.
YG’s hydraulic core drilling rig series features a 150mm through-hole design for the power head, allowing easy passage of PQ drill pipe. The chuck uses a quick-change module, enabling diameter switching in just over ten minutes. The mud pump flow rate is adjustable, up to a maximum of 250 liters per minute, fully meeting the needs of PQ drilling.
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FAQ: Frequently Asked Questions about PQ Core Drilling Rigs
A1: A PQ core drilling rig primarily refers to a wireline coring rig capable of drilling PQ-sized (approximately 85 mm in diameter) cores. Different sizes (such as NQ, HQ, etc.) are suitable for core sampling needs of different diameters; PQ sizes are typically used in exploration projects requiring larger sample volumes.
A2: The biggest advantage of wireline coring technology is that it eliminates the need to pull up the entire drill string to retrieve the core, significantly saving auxiliary time and improving drilling efficiency. This is especially important for deep hole drilling, as it can substantially reduce operating costs.
A3: YG Machinery’s hydraulic core drilling rig employs high-quality hydraulic components and a robust structural design. It undergoes rigorous testing and can maintain stable and efficient operation in various harsh field environments, including high temperatures, extreme cold, and high altitudes.
A4: Choosing the right model requires considering your target drilling depth, formation conditions, required core diameter, budget, and project timeline. We recommend consulting our professional team, who will provide customized advice based on your specific needs.
A5: It can be used with various hard rock formations such as granite, basalt, sandstone, and shale. Equipped with diamond composite drill bits, it boasts high wear resistance. Furthermore, the hydraulic technology of the hydraulic core drilling rig enhances drilling efficiency, meeting the drilling needs of various scenarios.
A6: Yes, we provide comprehensive operation training to ensure your team can operate the equipment proficiently. In addition, we provide timely and efficient technical support and spare parts supply.
