Core Drill Rig

1200m Core Rock Drilling Rig

1000m Mining Core Drilling Rig Machine

800m Powerful Automatic Power Core Drill Machine

600m Global Sales Hydraulic Core Drill Rig

400m high-efficiency and energy-saving crawler-type core drilling rig

FAQ for Core well Drilling rig

What Is a Core well Drill?

The core drill rig is a specialized drilling equipment used in the fields of geological exploration, mineral resource prospecting and engineering geological survey. Its core function is to obtain complete and representative cylindrical core samples by accurately drilling into the stratum, which can provide direct and reliable physical evidence for lithological analysis, mineral resource reserve assessment, engineering geological condition evaluation, etc., and is an indispensable core exploration tool in the fields of geological research and resource development.

What are the advantages of Core well drills？

High core sampling quality: It can accurately obtain complete cylindrical core samples, fully preserve key information such as stratum bedding structure and mineral distribution, provide direct and reliable physical evidence for geological analysis, and avoid exploration data deviation.
Strong scenario adaptability: It can handle complex formations such as hard rock layers and fracture zones, meet diversified drilling needs from shallow to deep holes, be widely used in multiple fields including mineral exploration, engineering geological survey and hydrological exploration, and adapt to complex operation environments like field mountains and mining areas.
Flexible operation and high construction efficiency: Most models are designed to be portable or mobile, featuring small size and light weight for convenient transportation and installation, which is suitable for decentralized field exploration operations. It can also be flexibly matched with air compressors and mud pumps to adjust drilling processes according to different formations.
High data accuracy: It can complete both drilling and core sampling simultaneously in one operation without repeated work. The obtained core data can directly guide mineral reserve assessment and infrastructure foundation evaluation, reduce the probability of subsequent exploration rework, and effectively cut overall project costs in the long run.

How to match the drilling diameter and depth parameters to the construction requirements of geological exploration coring / engineering investigation sampling?

For geological exploration coring, select diameter based on purpose: φ50-100mm for routine surveys, φ100-150mm for mechanical tests, and φ75-100mm double-layer core barrels for fragile formations; depth should penetrate key stratum interfaces, reach ore bodies (including roof and floor) or target aquifers/geothermal reservoirs, and extend to the bottom of aquicludes.
For engineering investigation sampling, choose diameter according to stratum and project: φ30-50mm for shallow unconsolidated layers, φ50-100mm for deep rock-soil layers, and φ100-150mm for core bearing strata of major projects; depth should cover the project impact range, e.g., drill 3-5m below the bearing stratum for foundation investigation, and reach the subgrade impact depth for road projects.
Before matching, clarify the requirements of the investigation assignment and stratum conditions, follow industry standards; for complex formations, reduce diameter and control depth in sections to improve coring success rate.

Which type, portable or crawler-type core drilling rig, is more suitable for mountainous field exploration / plain construction site investigation work?

Mountainous field exploration: Prioritize portable core drilling rigs—compact, lightweight (man-portable), easy to deploy in rugged, inaccessible terrain. Crawler-type rigs are hard to transport due to steep slopes/narrow paths, only suitable for a few open flat areas.
Plain construction site investigation: Prioritize crawler-type core drilling rigs—stable chassis, high drilling power, efficient for deep coring and continuous multi-point operation. Portable rigs, with limited depth and efficiency, are only for supplementary small-scale exploration.

How to adjust operations when excessive borehole deviation and core fragmentation occur during coring?

For excessive borehole deviation: Stop to check and re-level/reinforce the rig; reduce drilling speed to 60%-80% of original, limit single footage to ≤0.5m to avoid forced drilling; use guide drilling tools or heavy drill collars for correction if deviation is large, backfill and re-drill if necessary.
For core fragmentation: Slow down drilling, adopt "slow drilling and careful coring" to reduce core disturbance; optimize mud viscosity to enhance wall protection and cuttings carrying; replace with suitable coring tools (e.g., double-layer core barrel, diamond bit); shorten coring intervals in fractured zones.
General note: Strengthen deviation monitoring and core observation during drilling, stop immediately to adjust if abnormal to avoid deviation accumulation and further core damage.

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