Drilling equipment are a machines
which are used to bore holes by utilizing drill bits which will vary according
to work application. Drilling of holes can be done very easily, effectively and
at low cost on any drilling operations. All present day metal cutting drilling
machineries originated from bow drills used by Egyptians in the year of 1200
B.C. There are a number of drilling equipment which are currently being used in
the market to sink a borehole into the ground. Every drilling equipment is
different from each other in terms of how far or how wide the bore will be, if the
operation requires samples during the drill and of course whether it the
application will be a big or small operation.
In mining engineering there are two basic
types of drills, drills which produce rock chips, and drills which produce core
samples. Below are some common methods;
Auger drilling applies a bit with a helical
screw blade which is driven into the ground and through the borehole the blades
of the screw will have the earth lifted up.
Percussion rotary air blast drilling
(RAB) most commonly applied on mineral explorations that utilizes a hammer in
the form of a driven reciprocating piston to force the drill bit into the rock.
Hollow rods are used that encloses an inner tube that shoots out the earth that
is excavated from the bore into a water well. Although this method has been
superseded by other recent drilling techniques is remains to be widely used
because of practicality in terms of bore diameter, deep bedrocks and easy
access of rural water well supply. Contrary to reverse circulating drill, the
earth cuttings reach the surface in a continuous steady flow making the samples
less likely damaged for study.
However, in terms of sample study the
best method will be diamond core drilling. With this method as the name
implies, drilling utilizes a diamond scattered bit where the diamonds are set throughout
a soft metallic matrix. Like any other drilling principle, the bit is mounted
on drill stem and onto a rotary drill. Although the matrix wear the diamond bit
slow, water is pumped into the pipe to reduce heat and friction. This also
allow water to washout the rock cuttings while the drill produces a core which
in return is split longitudinally and studied.
In the mining industry, drill bits
play an important role as much as the drilling equipment employed. A good drilling
equipment that is manned with an expert operator will ensure the lifespan of
its bit ergo better project results. With the current advancements and
development many outmode machineries that in use, however it would take time
and catching up. Yet by far current drilling equipment in the market are good
for value that does its job as expected with a number of companies that boast competitive
and durable products. In the end all that matters is time frame of the job at
hand and what one company needs are what is out in the current market has.
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