Underground Construction - January 2019 - 32

Hunting Introduces

Mud Motor for Mid-Range
HDD Rigs

H
F I
RST
L O O K

Jeff Griffin | Senior Editor

Hunting Energy Services has introduced a
4-inch mud motor for use with mid-range
horizontal directional drilling (HDD)
equipment.
"We have developed a mud motor that
can be use with directional drills ranging
from 24,000 to 40,000 pounds of pullback," said Klane Kirby, general manager
of Hunting's trenchless division. "The 400
M-Series mud motor allows drillers using
smaller rigs to drill rock when necessary."
Kirby said a key feature of the new mud
motor is the location of the downhole
sonde within 26 inches of the bit, making
it easier to know the bit's position. Conventional motors, he added, position the
sound 13 to 15 feet away from the bit.
"The challenge was to find an electronics company to work with us to design a
small sonde with excellent depth capabilities," Kirby said. "Underground Magnetics
is manufacturing a small-diameter sonde
exclusively for Hunting that can reach
depths to 90 feet."
The new mud motor and tracing equipment is available now from Hunting distributors for sale and rental.
"At this time," said Kirby, "the motor
can only be used with Underground Magnetics systems due to the small diameter
sonde. We do provide a package price for
everything and we do send the electronics
at no extra charge on a rental. This motor
can also be used with wireline systems."
The Hunting mud motor accepts bits
ranging from 4 7/8 to 5 7/8 inches.

On the job
The overall length is 13 feet; the bit with
a two-degree bend is 52 inches. Flow
range is 35 to 150 gpm with speed range
from 78 to 225 rpm. Operating differential pressure is 530 psi and the torque at
operating differential pressure is 720-foot
pounds.
Kirby said the motor uses about two
to three times more fluid than conventional dirt housings. Therefore, a small

JANUARY 2019 | UConOnline.com

reclaimer may be needed depending upon
distance to a water source.
Mechanical, dual-pipe drive systems are
available for rock drilling with the same
size equipment that the new Hunting motor is designed for.
"Hunting's approach." Kirby said, "is to
offer the owner of a small conventional
dirt machines an option to drill rock on
occasions when encountering it - another tool in their tool box, so to speak. This
approach is much more economical than
the dual-pipe systems ordered on a drill
which can increase the overall cost of the
drill 20 to 25 percent. Our mud motor enables the small drill owner the capability
to drill sections of rock and still maintain
a small footprint in residential areas with
limited space."
A good example of the Hunting motor's use was a bore in McDavid, Fla., said
Kirby.
"Our customer had attempted a 325foot creek crossing five different times
with a dirt housing on his Toro machine,"
he continued. "Each time. they hit a layer
of rock between 10 and 15 feet deep. This
layer would not let them go up or down,
depending on which side of the creek they
were on . We took the Hunting motor and
made the bore the first time. Our deepest
depth was around 24 feet with a length of
bore between 325 and 350 feet. The bore
was completed in less than two days."
Hunting Energy Services is a leading
provider of HDD drill pipe and downhole
tool products that include saver subs,
drive chucks, starter rods, transition subs
and quick connecters.
Underground Magnetics manufactures HDD tracking equipment, including
transmitters, receivers and displays.
FOR MORE INFORMATION:
Hunting Energy Services Inc., Trenchless,
337-367-9296, huntingplc.com/trenchless
Underground Magnetics,
(913) 626-7654, undergroundmagnetics.com

http://www.hunting-intl.com/trenchless http://www.undergroundmagnetics.com http://www.UConOnline.com

Underground Construction - January 2019

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