Diamond Core Drilling Methods
Diamond core drilling is
a low noise, dust free and non-percussive drilling method used to make smooth
holes. Diamond core drilling techniques are required when you need a precise
circular penetration. Using diamond core drilling
techniques you can make holes of any size and depth. This can be used for
construction installation applications, water system applications, earthwork
quality inspection applications, electrical system applications, gas supply
system applications, heating system applications, railway installation
application, bridge installation application, plumbing application,
telecommunication line installation application, concrete sample analysis,
anchoring bolts, and mining application.
Rotary and Wireline are
the main types of diamond core drilling techniques. Rotary drilling method
utilized for borehole drilling contractors and coring in rocks. Wireline is one type used
for mineral exploration and it aims at not making a hole but to retrieve a core
sample.
The different methods of
diamond core drilling are Electric, Hydraulic and Pneumatic available for wet
or dry drilling applications. The Electric method is used to drill perfect
holes in tile, natural stones like granite, and gravestones, concrete,
countertops, plumbing and other masonry applications. This type of drilling is
also suitable for drilling holes in walls, floors, ceilings and all concrete
anchoring systems. It can be used to perform drilling operation quickly and
efficiently. The Hydraulic method implements both mechanical and electronic
protection means, and is the easy to move, economical, durable, safe and
reliable diamond core drilling method. The Hydraulic method is excellent option
for making large diameter holes. Pneumatic method is suitable for drilling
holes in walls, floors, ceilings, refractory brick and concrete anchoring
systems.
The drilling method uses
a diamond core drill bit fixed to the end of drill rod in the drilling machine
or equipment. The diamond bit is rotated gently and at the same time it is
lubricated with water to prevent overheating. With the drilling which uses
diamond core drill bits, the primary importance is given in providing enough
water lubrication on the cutting edge of the diamond bit. Reduced drill speeds,
low drill pressure and copious use of water lubrication increase the durability
of the drill bit. This is categorized based on the different lubrication
techniques used. The various methods of drilling are Hose or Water Drip, Clay
Dam, Pan Drilling and Spray Bottle diamond core drilling.
Hose or Water Drip
method: This method of drilling uses a small hose to run water into the bore
hole and onto the hole surface. Clay Dam Diamond core drilling method: This
method involves building a dam around the drill hole with the help of modeling
clay. This method allows water to flow into the diamond bit and provides good
interior lubrication. Pan Drilling diamond drilling method: This method
involves using pan or plastic tub filled with water such that it covers the
surface of the material being drilled. Spray Bottle diamond drilling method:
This method of diamond drilling method involves constantly spraying water into
the bore hole using a spray bottle.
In all the above
methods, it is very important to use the pumping technique in order to allow
lubrication to reach the tip of the drill bit. A periodic pumping action is
essential to extensively improve the lubrication at the drill tip. The pumping
technique ensures that water reaches the drill tip area and completely
lubricates the drill tip.
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