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Core Drilling

Understanding the process of Core Drilling

Core Drilling / Core Cutting / Core Sampling

Core Drilling

Core drilling is a rotary drilling process in which rock, cement, asphalt, granite or other extremely hard material, is cut with an annular or round drill bit, to extract a core or cylindrical sample of the drilled material.

Core drilling is also used to create holes or channels for infrastructure such as ducts for plumbing, phone lines, sprinkler systems and electrical wiring.

It is the most effective method of testing concrete as it allows for an undisturbed or intact example of the material. It is sometimes referred to as diamond core drilling because of the diamond drill bits used.

Core drilling is done with a core drill which is a drill specifically designed to remove a cylinder shaped piece of material. A core drill has a hollow shaft in which the material embeds as a cylinder for removal after drilling. This leaves a piece of drilled material that can be used for laboratory testing, or discarded where only the hole or duct is needed.

Metal core drills are called annular cutters and concrete core drills are usually called diamond core drills. They are water cooled.  Solvocore provides core drilling LINK: https://solvocore.co.za/core-drilling-needs/ services anywhere in Africa.

Our Core drilling services include:  

Diamond Drilling
Diamond drilling is a version of core drilling which uses a drill with a diamond drill bit.
It is used in projects which require precision drilling where hole measurement is important. In addition to drilling, Solvocore does concrete cutting with diamond wire such as in repairing dam walls.

Concrete Drilling
Concrete drilling is part of the concrete cutting process and includes sawing, drilling and removing concrete.

Core Cutting
Core cutting is also known as concrete coring and it refers to the process of cutting cylinders of concrete from a structure.

Core Sampling
Core sampling is core drilling used to extract samples of the core of the material or to create drilled holes for construction purposes.  Core drilled material samples are extracted for use in testing laboratories. Laboratories need to confirm that the construction material is of the required quality, strength and durability to make it reliable for its intended use. Material sample testing is used in mining, construction and road building.

Solvocore can extract core samples, and create cylindrical holes, of 12 – 600 mm in diameter to any length, and provide solutions to technical problems associated with core drilling. Core drilling is mostly done with diamond or carbide drill bits.

Stitch drilling
Solvocore does stitch drilling. Stitch drilling is a technique of drilling a series of overlapping holes to create a larger opening in the same way that stitches are interlinked in sewing.

Stitch drilling is used when the diameter of a drill is insufficient to create the hole size needed. It is often used in the diamond mining industry where larger holes than 1,5 metres are required.

This technique of drilling also allows for the boring of odd-shaped or non-standard holes. It can be used to bore a square shaped hole if needed.

Stitch drilling is used for crane base removals, lift shaft openings and other industrial applications where conventional saw cutting is not adequate.

How deep can Solvocore drill?
Solvocore can drill to virtually any depth required, and up to 600mm in diameter. Where larger holes are required, we use stitching.

Will a core drill go through metal?
Yes, core drills with their diamond drill bits can cut through reinforced steel. We often cut through reinforced steel with our drills when we repair dam walls or bridges.

The advantages of diamond core drilling include:
•  Faster operation and lower labour cost
•  Precision cutting without the need of repairs after the fact
•  Little dust and less debris on the work site
•  Keeping the structure intact due to low vibration levels
•  Lower noise level on site

Core drilling is the best method for testing concrete. We usually look for scaling (peeling), leaching (dissolving components) or pattern (map) cracking to determine whether core drilling is needed for inspection purposes.

Solvocore provides the complete range of core drilling services including:  
-Angle core drilling
-Vertical core drilling
-Horizontal core drilling
-Inverted (upside down) core drilling

Solvocore boasts experienced, well-trained, core drilling engineers and operators who are able to provide the highest quality, reliable, core drilling service anywhere on the continent, regardless of the difficulty or size of the drilling project.

Post Author: janaj

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