Where is the portable fully hydraulic core drilling rig used

Source：www.sggroup-cn.com.cn Release date： 2025-06-25

The portable fully hydraulic core drilling rig is a geological exploration equipment that uses a hydraulic system as its power source and has lightweight and mobile characteristics. It mainly collects underground core samples by rotating the drill bit, providing physical basis for geological analysis. Its application scenarios cover multiple fields such as geological exploration, engineering construction, and resource development. The following are specific application scenarios and functional analysis:
1、 Geological mineral exploration: core sampling and vein analysis
1. Exploration of metallic and non-metallic mineral resources
Application scenario: Conduct exploration in mining areas such as iron, copper, gold, and coal mines to determine the thickness, grade, and distribution range of ore bodies.
Equipment advantages:
The hydraulic system provides stable torque (usually 1000~3000N · m) and can penetrate hard rocks such as granite and basalt;
Portability (total weight ≤ 500kg, detachable for transportation) is suitable for complex terrains such as mountainous areas and jungles, without the need for large transportation equipment.
Homework process:
The drilling rig is manually disassembled and transported to the exploration site. After assembly, the verticality of the drill rod is controlled by a hydraulic cylinder (error ≤ 1 °), and drilling is carried out at a speed of 30-50rpm. The collected rock cores (diameter usually 50-76mm) are numbered according to depth and used for mineral composition analysis and reserve evaluation.
2. Preliminary geological survey of oil and gas fields
Function: In the stage of oil and gas exploration, collect sedimentary rock cores and analyze parameters such as reservoir permeability and porosity.
Equipment features:
Equipped with anti sticking drilling hydraulic protection system, it automatically adjusts the feed pressure (10-20MPa) when encountering sudden changes in the formation to avoid damage to the drilling tools; The drillable depth is usually 50-100m, which meets the exploration needs of shallow oil and gas reservoirs.
2、 Engineering construction: foundation survey and geological stability assessment
1. Survey of building foundations (buildings, bridges, tunnels)
Application scenario: Before the construction of high-rise buildings, river crossing bridges, and subway tunnels, explore the soil and rock properties of the foundation (such as bearing capacity and compressibility).
Homework case:
In the survey of a subway line in a certain city, a portable drilling rig was used to drill holes at intervals of 50m along the planned tunnel path, collecting rock cores of silty clay and sand layers. The tunnel excavation method (shield machine or open cut) was determined based on the compressive strength of the rock cores (such as clay ≥ 100kPa, medium sand ≥ 200kPa).
Equipment parameters:
The drilling diameter is 76-110mm, the depth can reach 30m, and the hydraulic feed rate is 0.5-2m/min, suitable for scattered point exploration in urban areas (without the need for large sites).
2. Stability testing of slopes and roadbeds
Function: Before the construction of highway and railway slopes, explore the geotechnical characteristics of potential sliding surfaces to prevent landslide disasters.
Technical points:
By using a hydraulic drilling rig to drill holes at different elevations on the slope, rock cores are collected to analyze the distribution of weak interlayers (such as mudstone and shale), and a inclinometer is used to monitor the dip angle of the rock layers, providing data support for slope reinforcement design (such as anchor rods and anti slip piles).
3、 Hydrogeology and Environmental Engineering: Groundwater Exploration and Pollution Monitoring
1. Exploration of groundwater aquifers
Application scenario: Investigating the thickness, water quality, and permeability of aquifers in drinking water sources and agricultural irrigation areas.
Equipment function:
After drilling, it can be directly used as an observation well to determine the type of aquifer (such as gravel layer and fractured rock layer) through core analysis, and calculate the permeability coefficient (K value) in conjunction with pumping tests, providing a basis for well design (such as well depth and diameter).
2. Soil and groundwater pollution monitoring
Function: Drill holes around industrial sites and landfills, collect soil and rock core samples, and detect the content of heavy metals (such as lead and cadmium) or organic matter (such as benzene derivatives).
Characteristics of homework:
The drilling rig is equipped with anti pollution casing (made of stainless steel) to prevent the infiltration of pollutants from the upper layer during the drilling process. The core sampling depth can reach 20m, meeting the needs of shallow pollution exploration.
4、 Mineral Resource Development: Mining Production Assistance and Safety Monitoring
1. Advanced geological prediction of mining tunnels
Application scenario: Before excavating tunnels in coal mines and metal mines, drilling the geological conditions ahead and predicting faults and water inflow points.
Technical process:
Arrange 3-5 boreholes (with a depth of 30-50m) on the tunnel face, and determine the geological risk ahead based on the degree of rock core fragmentation and water content. If mudstone interlayers or fissure water are found, adjust the excavation plan in a timely manner (such as grouting reinforcement).
2. Stability testing of mining pillars
Function: In underground mining, drill the core of the ore column, evaluate its compressive strength (such as granite ore columns, which need to be ≥ 80MPa), and prevent the instability of the ore column from causing collapse.
5、 Research and Teaching: Geological Sample Collection and Experimentation
1. Geological research projects
Application scenario: Used by universities and research institutions in geological profile research and paleontological fossil collection, such as collecting sedimentary rock cores to analyze geological age (determined by fossil stratigraphy).
Equipment advantages:
The sampling depth can be controlled (error ≤ 0.1m), and the core recovery rate is ≥ 90%, meeting the requirements of scientific research for sample integrity.
2. Engineering experimental teaching
Function: In the teaching of geological engineering and geotechnical engineering majors, it is used to demonstrate the core sampling process and help students understand the principles of geological exploration.
6、 Matching the core characteristics and applicable scenarios of the equipment
1. Portability and terrain adaptability
Applicable environment: Areas that are difficult for vehicles to reach, such as mountainous areas, hills, swamps, etc., can be disassembled into 20-50kg modules (such as power units, drill rigs, fuel tanks) and transported manually or by livestock.
Comparative advantage: More flexible than tracked large drilling rigs, and more efficient than manual Luoyang shovels for sampling (with a daily drilling depth of up to 15-20 meters).
2. Technical advantages of hydraulic systems
Power characteristics: The hydraulic motor has stable output torque and can adapt to different rock types (hardness coefficient f=4-12). The feed pressure can be adjusted to reduce the risk of drilling jamming;
Control accuracy: stepless speed regulation is achieved through a hydraulic valve group, suitable for sampling (such as slow drilling of weak interlayer rock cores at a speed of ≤ 1m/min).

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