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How to Select a Diamond Core Drilling Rig – Expert Guide

2025-07-04

Choosing the right diamond core drilling rig depends on several factors, including the type of drilling project, geological conditions, depth requirements, and budget. Here’s a step-by-step guide to help you select the best rig for your needs

>> Determine the Drilling Purpose
1. Exploration drilling (mineral, geotechnical, oil/gas)
2. Construction drilling (concrete, reinforced structures)
3. Water well drilling
4. Scientific/research drilling (deep core sampling)

5. Grade control(GC) drilling rig(RC drilling rig)
>> Consider Drilling Depth & Diameter
1. Depth:
(1) Shallow holes (0–100m): Light-duty rigs

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(2) Medium-depth (100–500m): Mid-sized rigs
(3) Deep drilling (500m+): Heavy-duty rigs with high torque

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2. Core Diameter:
(1) Small (BQ/NQ sizes: 47–63mm)
(2) Large (HQ/PQ sizes: 85–122mm)
>> Power Source & Mobility
1. Electric: Best for indoor construction (low noise, no fumes)
2. Hydraulic: High torque, suitable for tough rock formations
3. Diesel: Portable, ideal for remote locations
4. Track-mounted vs. Truck-mounted: Choose based on terrain
>> Rock Hardness & Formation Type
1. Soft to medium rock (limestone, sandstone): Standard diamond bits
2. Hard rock (granite, basalt): High-quality impregnated diamond bits
3. Fractured/abrasive formations: Use surface-set diamond bits

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>> Rig Features to Look For
1. Rotation speed (RPM): Adjustable for different formations
2. Torque capacity: Higher torque for deeper/harder drilling
3. Auto-feed system: Ensures consistent drilling pressure
4. Core recovery system: Important for geological sampling

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5. Stability & rig weight: Heavy rigs reduce vibration in deep drilling
>> Final Recommendation
1. For mining/exploration: Choose a hydraulic or diesel-powered rig with high torque.
2. Construction/core sampling: A compact electric rig.
3. Deep scientific drilling: A heavy-duty drilling rig with auto-feed.

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Would you like recommendations based on a specific project type?

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