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"If you have a bore that you
haven't been able to drill, chances are the INCREDIBIT® will drill it."
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Railhead's INCREDIBIT® drill head is named for
its ability to bore and steer through tough, rocky conditions.
Its patented technology allows contractors to accomplish
bores in ground that can not be drilled with conventional
bits.
And, it allows smaller machines to drill through some
conditions that would otherwise require a mud motor. It
is truly a multipurpose bit that steers through soft conditions
as well as rock and cobble.
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How the Incredibit® works
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The INCREDIBIT® bores in an entirely different
manner than any other bit. Rather than using simple abrasion,
the INCREDIBIT® fractures rock in a random elliptical
pattern. It "dances" in the hole, allowing the
INCREDIBIT® to be productive in all kinds of soils
and formations.
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Because of the "dancing"
effect, the INCREDIBIT® bores a larger hole than conventional
bits. In most conditions, a 2 ¾" bit will
cut approximately a 4" hole, a 3" bit will cut
approximately a 5" hole, a 3 ½" bit will
cut approximately a 6" hole, and a 4 1/8" bit
will cut approximately an 8" hole.
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DRILLING
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The
drilling technique used with the INCREDIBIT¨ is similar
to a flat bill bit in softer formations, however, when drilling
in harder formations it is important to not force the bit, but
let it drill at it's own pace.
Apply steady pressure. We recommend starting with 500 pounds
of forward thrust and increase pressure as needed based on the
conditions of the bore site. Rotational torque may also start
at 500 pounds. Simply allow the bit to work while maintaining
enough pressure to accomplish the job.
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STEERING
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Steering in soft
formations is similar to steering with a flat bill - turn and
push. Steering in harder formations requires more technique.
The best method to use is to push into the rock and cut over
to create a relief, pull back, rotate, and do it again.
If you wanted to go to 12 o'clock - you would push in at 10
and rotate over to 2 while applying heavy force. Repeat this
action as many times as necessary to carve in about one foot,
then check your pitch. Continue until the desired pitch has
been reached. This is the only time we recommend increased pressure.
Use only enough force to score the rock and create a relief.
Drilling in different formations requires varying your drilling
techniques. The most common problem you will encounter is layered
formations.
It is difficult to steer when the layers are running at the
same or at a close angle to the pitch you are trying to achieve.
Generally there is a spot somewhere in the layer that you can
catch and turn. Where that is - is anybody's guess.
The key is to be patient and continue to cut and rake until
you find it. Sometimes you can pull back, find another angle
of attack, then come back up with more pitch to get enough angle.
Most holes are saved because of the operator and his familiarity
with the machine and the bit.
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DESIGN
FEATURES
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US patents 5,931,240 5,934,391 6,209,660. Canadian patent
2,221,068 |
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The INCREDIBIT®
comes in two configurations for different rock hardness formations: |
Standard |
1. The Standard INCREDIBIT®
for boring soft to medium hardness rock formations. |
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Agressive |
2. The Aggressive INCREDIBIT®
for easier boring in harder rock. |
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Replacable
Teeth |
Rock teeth play
an important role in getting the most productivity out of your
INCREDIBIT®.
As the teeth come in contact with rock, the combination of torque
and pressure create cracks in the rock and force small pieces
of rock to break away. Generally speaking, sharp pointed teeth
are more effective in softer conditions and rounded teeth are
more effective in harder conditions.
The chart shows which teeth are the most effective for general
drilling and hard drilling conditions. However, these recommendations
may not work in all situations. |
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Interference
Keyway
The INCREDIBIT® is fitted with an "interference keyway"
that relieves the side stress on the bolts that secure the bit
to the sonde housing.
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Repairable
Any tool used to bore in adverse ground conditions will sustain
wear. The good news is, within reason, the INCREDIBIT® can
be rebuilt. |
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Got a BIG rig?
Now you can get an Incredibit® made especially for
the BIG machines.
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Big rigs 50,000 lbs.+ can have
the amazing Incredibit® too!
It can cut a 10" to 12" hole and is available
with a 5" sonde housing.
The incredibit drill head is named for it's incredible ability
to bore and steer through almost anything: hard blue shale,
sandstone, limestone, concrete, anything in it's path.
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