decanter centrifuge

The particular solids control system might
remove the large solid contaminants in the drilling mud to minimize the solids
content to ensure that to protect the transferring send that used to transfer
the particular mud back the machine for reusing. GN just simply finished one
set mud solids control system along with VFD
decanter centrifuge
intended for mining project in Southeast Asia.

This system is a two stages separation design product; the equipment
configuration is as beneath:
1 . Shale
unit GNZS594E-HB used for coarse strong particle separation. This
shale shaker unit could also be utilized as a high G pressure drying shaker
with variable G force up to eight. 4-panel screen makes a more substantial area
for drying often the drilling mud.
2 . VFD design decanter centrifuge system used for fine solids separating. The
first one unit centrifuge operates at a middle speed to eliminate most of the
solids to reduce often the gravity. The following second device VFD control
centrifuge might run at a high speed to get rid of the ultra fine solid waste
to make the drilling mud clean.
3. Screw pump prepared to transfer the dirt to the centrifuge. Horizontally set
up at the flank of the reservoir, it helps to tank leading more space for
operation mobility.
4. Mud cleaner reservoir used as sand pitfall and active mud hard drive.
This system is to remove the sound particles in the drilling soil to make the
drilling fluids using again. After the solids being taken off, the fluids could
be piped back for reuse as well as the pump would be also guarded as there are
less solids dust.
Mud solids control strategy is
very common product and alternative that GN provides. For this reason, GN could
provide parting system used for oil going, no dig drilling task and some other
industrial sturdy and liquid phase separating. For more information, welcome
send you email or call devoid of any hesitate.

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As first API certified solids control
manufacturer in China, GN Solids Control has provided to more than 60 countries
and regions with its cost effective products, covering all related main
equipment of solids control and waste
line for oil and gas drilling

The main principle of the
solids control systems
is physical separation, using the physical
characters of different media, the solids control equipment separate as much
solids from the liquid. Right now, in other industries besides the oil and gas
drilling, such functional equipments are also chosen by the end users, to make
their work more efficient and easier

Physical Functions of solids control

Since the most important solids control
equipments are respectively shale
and decanter centrifuge, we talk about only these 2. Now in many oil
and gas drilling jobsite, the end users choose to use more shakers and
centrifuges instead of former hydrocyclones.

1. shale shaker. Shale shaker is the most
efficient equipment in solids control process, because it uses less energy
while separates the most solids out of the liquid by using the different size
of the solids and by means of different size mesh on the shaker and a couple of
vibration motors. The disadvantage is that the shaker could not separate very
fine particles, and its separation work is a bit draft. GN has 3 nos screen
shale shaker and 4 nos screen shale shaker for option with model GNZS703E and

2. decanter
is a high speed rotation machine, mostly horizontal. It has a
high speed rotating bowl and inside bowl there is an impeller. During the
rotating, the centrifugal forces on different material are not same, that
causes the liquid phase continuously flows out of the bowl while the solids
particles are slashed on the bowl inside wall and pushed out of the centrifuge solids
discharge ports. The decanter centrifuge a gentle and precise, more costly than
shale shaker, not only the cost of itself, but also the consumption of electric
power. But it is ideal solution for separating out the fine and extra fine
particles. GN centrifuge family covers all common sizes of decanter centrifuges
from 9 inch bowl diameter to 22 inch bowl diameter, among those centrifuges,
GNLW363 with 14 inch bowl is the most popular model

For more information, welcome to contact us
freely or visit our website.

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As is known to all and recognized by more
and more people, a waste management system is more and more important for an
oil and gas drilling jobsite. In some countries, there are strict laws that
without a drilling waste management system,
the drilling rig is not allowed to start.

Nowadays, the most popular waste management
system is combined by a vertical cuttings dryer and a high speed decanter
centrifuge. The vertical cuttings dryer is working like a washing machine’s
drying process, and the liquid phase discharged by the vertical cuttings dryer
falls into a tank under the cuttings dryer, and then transferred to the
centrifuge for further treating.

GN Solids Control is very professional in
manufacturing such waste management systems. Just in year 2014, GN has produced
tens of similar systems with one of GNCD930C/CVFD vertical cuttings dryer
and a GNLW363CG/CG-VFD decanter centrifuge.
Such systems are working well at jobsites of many countries and places,
including Shell’s and Baker Huges’jobsites.

Although all such systems are for further
separating the drilling cuttings discharged by solids control system in former
phase and they are nearly same, but since each jobsite is different, the
feeding method differs a bit. Per the layout of jobsite and the material
conditions, there are mainly 3 kinds of feeding methods:

1.      Using
a hose pump for transporting the material into the vertical cuttings dryer. A
hose pump itself is small in size. It has some self suction function, but not
so common as following two methods.

2.      Using
a screw conveyor (auger) and a screw pump for feeding the
vertical cuttings dryer.

3.      Using
two screw conveyors for feeding, one is horizontal and the other is a slope

In both above mentioned methods, the first
screw conveyor could have a hopper for collecting drilling cuttings.

No matter which method is chosen for a
certain jobsite, it depends on the jobsites’ space and requested layout, and
also affected by material condition as the density and viscosity. May you have
requests for this, welcome to contact us freely and our engineer will make out
for you the most suitable solution.


After a long holiday, which is the longestholiday in China, GN is back to work with full energy. Spring festival is mostimportant festival for every Chinese. After spring festival, according toChinese calendar, the new year starts. GN Solids Control is having a great start full of new orders.

Just before the holiday, GN has dispatched
20 sets of centrifuges to loading port, these centrifuges will arrive to
different countries in Middle East and Africa. In order to finish this order in
time, GN Producing department has been working around clock for at least 50

Among all the equipments used for oil and gas solids control and waste
, Decanter Centrifuge could better show a manufacturer’s
capability for producing. Each year, GN produce around 150 sets centrifuges,
and 70% of those are exported.

What Centrifuges does GN produce?

1.      High speed Decanter Centrifuge GNLW363C
series decanter centrifuge
. This is 14 inch bowl decanter centrifuge,
and very popular size and design. For the same model, GN has highest
configuration and economic configuration available. The highest configuration
is suitable for waste management use and also regarded perfect as dewatering
centrifuge. The economic configuration is suitable for separating the fine
particles for solids control system. For each configuration, there are fixed
speed and VFD controlled available.

2.    Middle
Speed Decanter Centrifuge GNLW452, with a 18 inch diameter bowl. In some cases,
it is regarded as big bowl centrifuge. it is perfect in practice for recovery
the barite in solids control system. It has only one motor, and a middle speed
of 1800RPM.

3.      Big
Bowl Decanter Centrifuge GNLW553VFD Centrifuge, with 22 inch diameter bowl, and
71 inch long. It is a bigger sized GNLW363C decanter centrifuge.

4.      Baby
Centrifuge, GNLW223, the bowl diameter is only 9 inch, it is commonly used for
diamond drilling or some mining projects.

Among those above mentioned decanter
centrifuges, GNLW363CG-VFD is the best seller. And it is always used for
drilling waste management systems together with other equipments for further
treating the drilling cuttings from a solids control system. For WBM systems,
they always use high-G dryer shaker, and for OBM
and SBM, they always use vertical cuttings dryer. Both
mentioned extra equipments are available by GN Solids Control. 

May you need more information, pls contact
us freely.

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The tank design is very important to keepsure all design reaches requirement and convenient for operators. The mud tank need consider its usable muddepending on drilling conditions and need consider its active circulation todrilling hole. The mud tank capacity will be affect by drilling depth also .Usable
mud is defined as the mud volume which can be pumped before suction is
lost. For example, a typical 20,000 f t
well will normally require a minimum active system tank volume of 1000 bbl.


The active surface system will be divided
into two parts, solids removal and addition suction. All solids removal
equipment and degassing equipment in the solids removal part the addition suction
part is designed to make fresh mud to the circulating system and provide
sufficient residence time for proper mixing to occur before being delivered to downhole. A slug tank is usually available to pump
small “pills “such as LCM or barite slugs for tripping. Each part must be
further divided into enough compartments to efficiently carry out its designed
function and circulation application.

The quantity of compartments required will depend
on the amount and type of solids removal equipment like shale shaker, desander, desilter, decanter
centrifuge and vacuum degasses system size and circulation mud flow each
compartment must have enough surface area to allow entrained air to break out
of the drilling mud. A rule of thumb for
the minimum surface area is calculated by: Area (squarest) = Maximum
Circulating Rate (GPM)/40To maximize solids suspension and usable volume, round
type tank with conical bottom is the best option for a tank, square or
rectangular shape with V bottom is the second option for mud tank, Square or
rectangular shape with a flat bottom is the last option but easier for
manufacture. The ideal tank depth is same with the tank width or diameter of
the tank. This design provides good pump suction head and is best for complete

GN builds many different type of tank with
different design; please contact us for more designs.

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