Railhead's INCREDIBIT® Drill Head

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.

How the Incredibit® works

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.

                        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.

                       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.

The INCREDIBIT® comes in two configurations for different rock hardness formations:

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.

DRILLERS SERVICE, INC.                       HICKORY, NC USA                        800-334-2308,  EXT. 230