Groundbreaking Achievement: China's First Kilometer-Level Horizontal Core Drill

June 03,2026

Recently, China's first set of kilometer-level horizontal directional coring drilling equipment, independently developed by CRCHI, has passed the authoritative certification of the National Construction and Urban Machinery Quality Supervision and Inspection Center, with core indicators reaching the international leading level, marking the successful debut of China's first set of kilometer-level horizontal directional coring drilling equipment.

Directional Coring Drill Rig

Directional Coring Drilling Equipment Inspection Qualified

This equipment system integrates core equipment such as directional coring drill rigs, directional coring drill bits, directional screw drill bits, and high-precision gyroscopic surveying systems, precisely focusing on the "bottleneck" technology of deep earth exploration, overcoming the industry's challenges of "slow drilling, incomplete coring, and inaccurate measurement" in complex strata, providing a solid guarantee for major national underground construction projects.

Composition of Directional Coring Drilling Equipment System

Drill Rig Strong and Efficient, Multi-Functional

Addressing the "slow drilling" issue, CRCHI has developed a kilometer-level directional coring drill rig. The entire machine is equipped with a self-developed wide-speed, high-torque power head (maximum torque 15000N·m, highest speed 800rpm), supporting stepless adjustment of speed, thrust force, and pump volume, precisely adapting to complex strata. The drill rig can match screw drill bits to achieve directional drilling, and can also match wireline coring drill bits to achieve rapid coring. For strata that do not require coring, screw drill bits can be replaced to quickly pass through, significantly shortening the construction period, truly achieving "point and shoot, see rock and know structure". By integrating various sensors, folding cranes, and mechanical hands for upper and lower rods, it has achieved automatic storage of drilling parameters, full mechanization of drill rod loading and unloading, and automated drilling, improving efficiency while greatly reducing safety risks and labor intensity.

Drill Bit Innovation Breaks Through, Directional Coring Proven

Addressing the "incomplete coring" issue, CRCHI has successfully broken through the core technology of directional coring drill bits, solving the industry's problem of "cannot core while directional, cannot directional while coring". In extreme conditions such as hard rock, broken zones, and alternating water inflow in a certain tunnel, the drill bit performed brilliantly, achieving simultaneous directional drilling and continuous coring, with a maximum drilling speed of 3.3m/h, breaking the technical monopoly, and providing the most direct and real rock core evidence for building a "transparent geology".

Directional Coring Drill Bit Field Verification

High Precision and Resistance to Interference, Strong Magnetic Environment Guidance

Addressing the "inaccurate measurement" issue, CRCHI has developed a high-precision gyroscopic surveying system. This system effectively overcomes the strong magnetic interference caused by dense rebar and equipment inside the tunnel, with an azimuth accuracy of ±0.5°, reaching the top level in the country. The product supports dual-mode operation: real-time data transmission in the downhole mode for immediate correction; the storage mode records the trajectory completely, generating an accurate "electronic file", double insurance to ensure the equipment says goodbye to "blind exploration".

Technology Empowers All Domains, Multi-Scenario Application Protection

This technology can be extended to various complex scenarios. In geological exploration, accurate geological information is obtained through long-distance directional drilling and continuous coring. In tunnel advanced forecasting, "drill while digging" is achieved by arranging side passages to keep the drill hole ahead of the tunnel face. In TBM construction, drilling is precisely controlled in the target area, solving the pain point of "inaccurate drilling" in traditional TBM advanced drilling. In addition, relying on strong disaster pre-processing capabilities, the equipment can achieve water drainage, rock burst pressure relief, and grouting support in broken zones, providing comprehensive protection for tunnel construction safety.

Directional Drilling Application Scenarios

The systematic breakthrough of CRCHI's directional coring drilling equipment has filled the domestic gap in precise detection of deep and long tunnels, and has strongly promoted the transformation of China's tunnel construction towards safety, efficiency