decanter centrifuge | GN Decanter Centrifuge

Water based mud drilling waste management system for CNPC & Sinopec

Since the new regulations for China oilfield
environment is issued, GN solids control has
provided over 25 sets of drilling waste management system for their water based
drilling fluids.

The main features of GN drilling cuttings treatment
system including:

1 Modular design: vertical
cuttings dryer, high G dryer, decanter centrifuge are all set on top of the
telescopic skid as a separate module, each module can be used separately when
the actual situation is required by the rigsite, and they can be used together
for best performance.

2 Less cost, good effect, the cuttings discharged from
the vertical cuttings dryer is dry as powder, which can be disposal directly or
used for construction industry without damage of the environment. Before using
GN drilling waste management equipments, the drilling company use the truck to
ship the drilling cuttings from the mud pit to a waste management factory, the
liquid waste spray out and they get a lot of complains from the farmers.

3 To recycle/reuse the clean fluids and less the
drilling cost. The working principal of GN drilling cuttings treatment system
is mechanical separation, without any chemicals additives. The clean fluids
discharged from
decanter centrifuge can be used for preparing the drilling fluids. Unlike
other supplier’s proposal, we do not add chemicals during the process, it will
not damage the configuration of the original drilling fluids, it can save a lot
of cost for the drilling fluids and less the waste treatment cost.

4 The high-G dryer is used to less the fine solids
content of the drilling fluids before feeding to the decanter centrifuge, the
unique design can make the centrifuge working longer time with less wear on the
screw impeller.

5 The drilling
waste management system for water based drilling fluids can be also used
for your oil based cuttings treatment, you do not have buy another unit , this
modular waste management system can be used for both of your applications.

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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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Modular Drilling Cuttings Waste Management Equipment for China TOP Oil Company

Since recent
months, China as many other countries as established more strict laws for
forbidden the drilling cuttings from the Oil and Gas drilling projects to be
discharged directly to the outside or anywhere else. They call them zero
discharge solutions, such solutions should be used for treating the drilling
cuttings in order to protect the environment.

Just like this
jobsite of CNPC, it is located among the farmlands and not far away from the
town. But they have found a rich oil reserve in this long time existing
farmland. Energy resources have to be explored, meanwhile, the farmlands must
to be well protected. Therefore an effective way to treat the drilling cuttings
is an urgent and very necessary solution.

They, like many
other clients of GN Solids Control chose GN waste management
systems as option and GN equipments are proved to have good
performance. Just in last year, GN Solids Control has sold around 20 sets of drilling
cuttings waste management systems to both domestic companies in China and also
abroad, clients including Baker Hudges, Shell and other world famous companies.
Most of them purchased standard GNDC series drilling cuttings waste management
systems including vertical cuttings dryer, high speed decanter centrifuge,
screw conveyors and screw pumps.

Some other
companies chose instead independent equipments per their special need and
applications, like GNLW363CG Decanter Centrifuge, they are using it as
centrifuge for treating the oily sludge on a telescopic skid, or for a
dewatering centrifuge used together with a dewatering unit, like for NIDC and KOC.

This year, for
providing most of clients’ special requests, GN Solids Control has designed
some modules for waste management. When they are used singly, they play roles
as dependent equipment for their original functions, and when they are used and
laid together, they could easily form a complete system. And during
transportation, they can easily to transport in containers.

Like in some
cases, normally you use vertical cuttings dryer and centrifuge is enough. But when
you need a high G shaker in between the above mentioned 2, you don’t have to
change to another system, just add some pipelines into it and locate a shaker
module at a suitable position.

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.

6 Sets of GN Decanter Centrifuge and 40 Sets Mud Agitator Delivered to South America Market

GN leads the way in solids control
technology with it new designed decanter centrifuge in
China. As the firstly API certified manufacturer of solids control equipment and
system in China, GN has always been keeping its leading position in
international market by it advanced technology. Early in this year, GN has
improved its decanter centrifuge to make it more suitable to treat drilling
waste which contains relatively larger solids content. So GN made a series
specific design to reduce abrasion on the screw conveyor and avoid solids accumulating
inner the bowl cover. The new designed decanter centrifuge has been proven to
have stable operation and more satisfying performance, thus becoming popular in
the international market, especially in the Middle East and Africa, Latin
America. Recently GN delivered 6 sets of decanter centrifuge and 40 sets
agitators to South America. The new designed centrifuge also can be used as the
final stage solids control equipment in a complete set of solids control system for
oil and gas drilling. The mud agitator is used to rotate the mud to
keep it homogenous.

Now GN is manufacturing one set of solids
removal unit for a South America customer. It will be used the clean the
diamond drilling fluids for recycling usage. Besides solids control systems for
oil and gas drilling, GN also designs and supplies desander unit for bore piling and TBM; mud systems for HDD
drilling, CBM drilling, water well drilling, geothermal drilling. The main
treating equipment is shale shaker and desander, desilter, or mud cleaner with
the combination of desander cyclones and desilter cyclones. The shaker is used
to separate coarse solids, and then the desander to separate solids over 40 micrions,
and the desilter to remove solids over 25 microns.