Contaminated Site Remediation Rig Research And Education Drill Platform

The Technical Precision Tool for High-Quality Core

The ultimate measure of a core drill’s value is the quality of the sample it produces. Fractured, disturbed, or incomplete core can render a drill hole nearly useless, no matter how deep it penetrates. The GD-400L Fully Hydraulic Core Drilling Rig is engineered as a technical precision tool, designed from the ground up to deliver intact, representative core samples that geologists can trust for resource estimation, geotechnical design, and scientific analysis. When data quality is non-negotiable, the GD-400L is the instrument of choice.

The foundation of sample quality is precise, vibration-free rotation. The GD-400L’s hydraulic plunger motor delivers torque with exceptional smoothness, free from the pulsations and torsional vibrations that plague mechanical drives. The stepless speed range from 0 to 1300 RPM allows the driller to select the exact rotational speed required for each formation, minimizing core breakage and preserving delicate structures. This precision ensures that even fragile, fractured, or unconsolidated zones are recovered intact.

Feed control is equally critical. The 12-ton hydraulic feed system provides smooth, proportional force application, allowing the driller to maintain optimal weight on bit at all times. The ground-contact integrated tower eliminates flex and deflection, ensuring that the feed force is applied exactly along the borehole axis. This combination of steady feed and rigid guidance prevents bit wander, reduces borehole deviation, and ensures that each core run cuts a clean, straight path. The result is core that accurately represents the true geology, without distortion or mixing.

The GD-400L’s hydraulic system is designed for fine control. All functions—rotation, feed, hoisting, and clamping—are operated through proportional hydraulic valves that respond instantly and predictably to lever movement. The driller can “feel” the formation through the controls, making micro-adjustments in real time to optimize core recovery. This tactile feedback is essential for navigating difficult ground and maximizing sample quality.

Sample handling from the moment it is cut is designed to minimize disturbance. The V-shaped self-weight gripper holds the drill string securely during rod breaks, preventing any shock or vibration that could damage the freshly cut core. The smooth hoisting action of the 10KN auxiliary winch ensures that the core barrel is retrieved steadily, without jerks that could cause the sample to slide or fracture. Once at surface, the core is extracted with care, ready for logging and sampling.

The rig’s versatility in drilling angles—from 0 to 90 degrees—allows geologists to target structures at their optimal orientation. Whether drilling vertical holes for resource definition, angled holes to intersect dipping veins, or horizontal holes for geotechnical characterization, the GD-400L provides the precise angular control needed to recover representative samples. This flexibility ensures that the geological story is captured in full.

Data recording is supported by optional instrumentation. The control panel can accommodate digital depth counters, penetration rate indicators, and pressure recorders, allowing operators to document drilling parameters alongside the core. This data provides valuable context for interpreting the core and can be integrated into geological models.

For exploration managers, geologists, and engineers who understand that a drill hole is only as good as the core it produces, the GD-400L is the technical precision tool that delivers. It combines smooth, controllable power with rigid stability and careful sample handling, ensuring that every meter of core is a true reflection of the subsurface. When your decisions depend on data quality, the GD-400L is the rig you can trust.

GD-400L Precision Core Recovery Specifications