As the global demand for resource exploration continues to grow, the detection depth of traditional cone penetration test (CPT) equipment has been unable to meet the needs of deep geological surveys, mineral exploration and engineering surveys. In recent years, the successful development of 1,200-meter ultra-deep CPT equipment marks a new stage in geological exploration technology.
1. Why is 1200m ultra-deep CPT exploration needed?
(1) Demand for deep resource development
Oil, gas and shale gas: Many exploitable reservoirs are located at depths of 800-1500m.
Geothermal energy development: Exploration of clean energy such as hot dry rocks requires penetration of deep bedrock.
Key minerals (lithium, rare earth): Some deposits are located in deep fault zones.
(2) Engineering geological challenges
Ultra-high-rise buildings: Pile foundations require assessment of deep soil bearing capacity.
Tunnels and underground engineering: Avoid the risk of geological disasters such as deep caves and faults.
(3) Scientific research value
Paleoclimate research: Deep sedimentary cores can restore environmental changes over millions of years.
Seismic zone monitoring: Deep rock stress data assists earthquake prediction.
2. Technological breakthrough of 1200m CPT equipment
(1) Super strong thrust system
| Technical solution | Advantages | Challenges |
| Hydraulic hydrostatic drive | Stable thrust (single cylinder can reach 200 tons) | The equipment is large and requires a customized chassis |
| Segmented propulsion mechanism | Modular design, adaptable to different depths | The connection strength requirements are extremely high (anti-fracture) |
| Electro-hydraulic hybrid | Energy saving of 30%, suitable for field operations | The control system is highly complex |
(2) High-precision sensing and data transmission
Strain sensor: 100MPa pressure resistance, error <0.1%FS (traditional equipment only reaches 50MPa).
Fiber optic real-time monitoring: Brillouin scattering is used to measure the formation temperature/strain, breaking through the cable transmission distance limit.
Anti-interference design: electromagnetic shielding + digital filtering technology is used to ensure the accuracy of data at a depth of 1200 meters.
(3) Material innovation of drill pipe and probe
Drill pipe material: titanium alloy coating (TC4) + carbon fiber reinforcement, 40% weight reduction, tensile strength >1200MPa.
Probe structure:
Diamond coated cone head (wear resistance increased by 5 times)
Built-in micro nuclear magnetic resonance module (direct detection of water content)
(4) Intelligent auxiliary system
AI formation identification: automatic classification of soil layer types based on machine learning (accuracy >95%).
Adaptive drilling strategy: adjust the propulsion speed according to real-time resistance to avoid drill jamming.
Cloud collaboration platform: multiple devices share data and build a three-dimensional geological model.
The 1,200-meter ultra-deep CPT equipment is pushing geological exploration into the deep era through the three major technical pillars of thrust system innovation, intelligent sensing, and material upgrades.
Does your project require ultra-deep exploration solutions? Welcome to contact us to get customized CPT equipment technical solutions!
