solids control equipment | GN Decanter Centrifuge

GNGH Solidification Unit, Final Treatment for Drilling Cuttings

The solidification unit is a newly adopted solutions for final treatment of drilling cuttings from both the OBM and WBM, especially the water based mud. It is original designed for the drilling cuttings discharged from the traditional drilling waste management systems, the high G dryer and decanter centrifuge, or ,the VG dryer and decanter centrifuge in case of oil based mud.

Normally the drilling cuttings from the traditional drilling cuttings waste management systems are not dry enough to be discharged directly. They need to be transported to other places for further treatment. In order to solve this problem, GN has designed and put into use the solidification unit, it could be connected along side the rig, and treat the drilling cuttings directly until they are inactive and could be buried on rig site as re-fill soil per some countries and regions’ rules.

Working procedure of GNGH Solidification Unit:

By using 3 hoppers, 1 big one and 2 smaller ones, the drilling cuttings to be treated and the other one or two additional components could enter the unit and mixed together. Normally the 2 components are respectively absorber and cement. They made the active things in the drilling cuttings to be inactive and make it harmless for the environment.

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Features of GNGH Solidification Unit:

GNGH-15A solidification unit is designed to have 3 VFD’s and it is an automatic operating unit. The 2 hoppers respectively for feeding the absorbers and cement could be used at same time or separately, depending on the operators’ request and the cuttings’ condition. By using the 3 VFD’s, the operator could also adjust the feeding ratio of the 3 to get an ideal result.

Now this solidification unit is used for more than one applications like the mud tank cleaning work and other projects. If you need any more information or have any interest, welcome to visit our website or contact us directly.

GN High Configuration Mud Plant

As the most well-known Chinese solids control brand, GN Solids Control has been working in oil and gas drilling industry for many years. GN clients are from more than 60 regions and countries including the extra hot places like the Middle East and Africa and extra cold places like Russia and Canada. GN’s main products including:

Solids control equipment and mud cleaning systems for oil and gas drilling including the mud plant.
Waste management equipment and systems for oil and gas drilling, including the drilling cuttings waste management system and drilling waste management systems
Mud recycling systems for HDD, TBM, CBM and water well drilling
Shaker screens

Those above mentioned equipment are mainly used for physical separation based on the solids particle size in the liquid. And the equipment are used for separate out the particles. And the barrier between them is not so clear.

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Like the high configuration mud plant, it plays some function for the solids control system. In order to reduce cost, some drilling companies don’t use decanter centrifuge in their solids control system, so when the old mud is transported and collected in a mud plant, the mud plant has to prepare a decanter centrifuge for further treating the mud. GN Solids Control produces the complete mud plant components including mud tanks, mud agitators, mud guns and mud mixing system And GNLW series decanter centrifuges are also GN’s core products. Even in some high configuration mud plants, clients use GN dewatering unit for separate the extra fine particles from the drilling mud.

GN mud plants are welcomed with clients. Some Chinese giant drilling companies are purchasing mud plants from GN, and GN mud plant carrying GN’s Logo are exported to many other countries in Europe, Africa, Australia and other places around the globe.

GN Dewatering Unit and Centrifuge

Among
all the solids control manufacturers in China, GN Solids Control’s decanter
centrifuges are most popular and of larger technology and most advanced
patterns. GN Solids Control carries a wide range of decanter centrifuges which
will cover nearly all the programs needed for oil and gas drilling solids
control systems, drilling
cuttings waste management systems, drilling liquid waste management methods
and for other drillings because diamond drilling and mining or prospecting.
1 . Per bowl length, GN centrifuges could be split up into big bowl centrifuge
and also normal centrifuges.
The most popular serving diameter is 14 “ diameter bowl, this product is
also GN’s best seller centrifuges. For the same bowl size, GN has 5 options for
consumers to choose from per their circumstances, economic configuration and
substantial configuration, VFD controlled and stuck speed controlled. For VFD
controlled, there are simple VFD controlled and positive pressurised control
panel available. Standard model GNLW363.

And there is baby centrifuge with one motor, only 9 inches diameter bowl, which
is considerably better for mining industry, along with model GNLW223.
Big pan centrifuges cover the types of bowl diameter larger than 17 inch. GN
has 20 inch bowl and twenty two inch bowl sizes intended for options. For 18
” bowl, there are GNLW452 using middle speed and GNLW453 with higher
speed, while the duration diameters are different.
Normally often the bowl diameter determines the particular treating capacities.
2 . for every speed, there are different RMPs available.
For the baby centrifuge, the RPM is 4500. GNLW363 with largest RPM of 3900,
while 20 inch ones, the RPM is 1800 for GNLW452, 2800 for GNLW453 along with
2500 for GNLW553.

For buying a suitable decanter
centrifuge regarding dewatering among GN centrifuges, 3 points should be
considered:
one high speed and larger bowl diameter/ length ratio, for example , GNLW452
has speed of 1800RPM and 2 as span diameter ratio, it is more desirable for
solids control rather than dewatering.
2 . better content, for more anti-wear, GN substantial configuration
centrifuges are much better.
3. VFD control
panel is preferred for prospects to choose suitable speed each condition.
In most cases, GNLW363CG-VFD is actually chosen as dewatering centrifuge for GN
clients.

Positive pressurized VFD control panel for variable speed decanter centrifuge

As one the lead decanter centrifuge
manufacturers in the world, GN solids
control( with branch office GN solids America in Houston) provide both high
speed decanter centrifuge and variable speed decanter
centrifuge with VFD control panel, VFD decanter centrifuge the most popular
model during our clients from over 60 countries in the world.

We provide 4 types VFD control panel of
decanter centrifuge based on different clients requirements:

1 positive pressurized VFD control panel for
explosion proof Exd II BT4 with PLC control

2 positive pressurized VFD control
panel with IEC certificate with PLC control

3 positive pressurized VFD control panel with
ATEX certificate with PLC control

4 flame proof/ explosion proof control panel

The positive pressurized VFD control panel is
specially designed for the working site with high temperature, moist air, heavy
rain, strong sunshine area with good performance. To ensure the long operation
life, we also suggest to use a sun/rain proof cover on top of the centrifuge
unit, as GN
drilling waste management project in Sichuan, China, Where is a lot of rain
and very moisture air.

With air cooler inside the control cabinet, we
have a temperature sensor installed and setting according the environmental
temperature and client’s requirement, once the inside temperature reached the
setting value, the cooler unit will start to work and feed to the inside
cabinet cold air and let the warm air out, the constantly circulation make the
inside cabinet to remain the respectively cool and will not be too hot during
long term working in the hot weather.

PLC control VFD control panel change the
frequency smartly, the last flame proof/ explosion proof control panel can not
work in hot weather, the electric components will be too hot to stop working or
be burned when it becomes hot. And the frequency inverter is working through
very traditional way. Such products are only supplied to the cold area or when
cheapest price is required by the client.

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Sources and Sizes of Drill Mud Solids

There are 2 main sources of drill solids
particles are the chemical additives and formal drilling cuttings, the drilling
cuttings are containments that degrade the performance of drilling mud. The
drilling particles will be ground into smaller and smaller and become more and
more difficult to remove from drilling mud if the drilling cuttings that not removed as per guide. Most of the
formal drill solids will be able to be removed by mechanical ways by drill
solids separate equipment and small drill particle will be very difficult to
remove and will have a great effect on drilling mud properties than the very
larger drill solids particles . The solids particle size in drilling mud
incorporated into drill mud will be range from 1 to 250 microns.

The clay, colloidal and bentonizte will be
size between 1 to 5 microns, silt, barites and fine cement dust will be 6 to 44
microns, fine sand will be between 44 to 74 microns, API sand will be 105 to
149 microns, coarse sand can be 500 – 1000 microns, coarse that larger than
2000 microns, there will be colloidal that bellow 2 microns.

Drilling solids particles are the main contaminant
in the drilling mud, so the control of the importance of the good solids
control including increased the penetration rate and reduce mud cost, reduce
water requirement, reduce mixing problem, reduce differential striking, etc.
The drilling solids removal is important to keep drilling mud recycling and re-use.
The
main equipment for drill solids removal are shale shaker , desander, desilter, decanter centrifuge and there will be other
machine assistant to meet separation application including mud tank, centrifugal pump, valve and pipeline.