Uncategorized | GN Decanter Centrifuge

4 sets GNLW452 Centrifuge for fast barite recovery

GN Solids Control decanter centrifuge is professional for
oil & gas drilling, horizontal directional drilling, coal bed methane
drilling, diamond drilling etc. The centrifuge is liquid / solids 2-phase
separation equipment, the separation point is 2 to 5 microns.

Recently, we have customer from CPP, China petroleum
pipeline bureau company, the largest HDD contractor from China. They just buy 2
sets of
500gpm mud system, each system equipped with 1 sets shaker with 2 ea desander
cones, 1 set shaker with 12ea desilter cones, 2 sets middle speed centrifuge
GNLW452. The middle speed centrifuge standard model is fixed speed centrifuge
with 1800RPM. The customer like customized centrifuge with variable speed
control panel. We company customized the fixed speed centrifuge to variable
speed centrifuge by adding one variable speed control panel with ABB transducer
inside to make the speed changeable. 1 set of GNLW452 centrifuge with treating
capacity 40m3/h, two sets means treating capacity 80 m3/h at same time. In this
case, the barite material in drilling mud can be take out by centrifuge very
fast. Thus, the total working efficiency will be promoted in a high level.

Except of GNLW452 middle speed centrifuge, GN
Solids Control also have other model centrifuge for other application.

1) GNLW363CG or GNLW363CG-VFD is high speed centrifuge,
fixed speed / variable speed two options for customer. This centrifuge is
professional for drilling mud weight reduce for solids control. Or it can be
used for drilling
waste management to remove the very fine solids from drilling waste, thus to
reduce the oil on cuttings (OOC).

2) GNLW553 big bowl big capacity centrifuge. If in some
certain case, the customer don’t want to use desander unit or desilter unit,
the customer may only use shale shaker & centrifuge for fast drilling. This
kinds of combination can also reduce the power consumption in a large degree. Because
when you use desander units or desilter units, big pump with electric motor is
generally needed.

GN other model centrifuge, like GNLW223 baby centrifuge,
GNLW453 big bowl centrifuge is also available.

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Dual Centrifuge mud system for CPP

GN Solids Control have many
production project for CPP from year of 2010. CPP is the largest HDD contractor
from China and engaged in China and overseas market. GN Solids Control compact
mud system and centrifuge is also working in many different jobsite with CPP
teams.

Beginning of this year, we got 4 sets 500gpm mud recycling system for
CPP. Different from former system configurations, this time CPP require 2 sets
variable speed middle speed centrifuge for each system. In this case, they can
recover the barite from used drilling fluids fast. The centrifuge is GNLW452
big bowl middle speed centrifuge with variable speed control panel to adjust
the speed flexible.

Except for 2 sets middle speed centrifuge,
other solids control equipment including:

1) 1 set Mud desanding cleaner GNZJ705-2S, with double deck shale
shaker GNZS705. It is for the first and second stage separation.

2) 1 set Mud desilter cleaner GNZJ705-12N,
with double deck shale shaker GNZS705.
It is for the first and third stage separation.

3) 2 sets mud agitator installed on
centrifuge tank compartment, to avoid drilling mud settle down.

After double checking the whole system, you
can find the HDD mud system with 2 sets shale shaker, 1 set desander assembly ,
1 set desilter assembly, 2 sets centrifuge. The treating capacity is much
bigger and the drilling mud can go to desanding cleaner and desilter cleaner at
same time. The drilling fluids go into this two units via distribution box and
controlled by flange and valves. Generally, the actual treating capacity can
reach to about 800gpm to 1000gpm.

GN Solids Control is famous solids control
equipment mfg from China with rich experience in compact mud system
fabrication. The different mud system capacity including: 500gpm mud system,
800gpm mud system and 1000gpm mud system.

Except for small mud system for HDD, CBM,
TBM etc, GN also produce lots of oil drilling mud system every year for oil
drilling companies. If you need more support, pls contact us freely.

Maintenance highlights of decanter centrifuge

While
operating well drilling, the drilling
fluid centrifuge machinery is one of the central
equipment that is often used, its purpose is mainly used for separating fine
solid debris whose diameter size are 2-7 μm from the drilling fluid. By using the drilling fluid centrifuge to
remove solid debris, it can effectively well lubricate and protected the drill bit;
it also has a very important role of improving drilling bit speed. With the oil
drilling industry ways and the technologies are getting mature; the drilling
fluid centrifuge manufacturing technology has been greatly improved as well.
However, there are some inherent mechanical issues if not solved it will give
the operators many function issues.

We as
manufacturer often have seen operators encounter issues below:

1. Bowl fault.
2. Consumable parts (inlet pipe, shockproof strip) problem.
3. Excessive vibration wile machine is currently working.
4. Outlet blocking by solids wish to remove from fluid.
5. Explosion-proof plug damage.
6. Centrifuge scroll damage.
7. Bearings failure while process of operation.
8. Drilling fluid centrifuge hoses damage.

We as
manufacturer suggest below if such issues operators encounter:

Operators
must understand that regular maintenance on the centrifuge such as regular
cleaning the inlet and outlet by filling water or diesel depends what kind of
fluid it needs process. It is also
crucial that add grease to the bearing parts to ensure proper lubrication.

Operators
needs regularly inspect often- damaged parts on the drilling fluid centrifuge,
such like hoses. In order to ensure the process in the use of these parts in
normal way this influences the production. Finally, electronic parts of the
centrifuge are working the best by running certain period of time frame (like
none-stop for hours). It needs, reduce the rapid turn on and off of the
centrifuge. If properly operate the centrifuge like mention above, then
operators will find out centrifuge failure rate will be greatly reduced during process
the drilling fluid.

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Why Choose GN’s 4 Panel Shale Shaker for Solids Control

Shale shaker is a type of very common
drilling mud solids control in all kinds of drilling projects. As a leading
manufacturer of solids control equipment, GN could provide the shale
shaker and other mud recycling equipment for oil gas
drilling, horizontal directional drilling, water well drilling, tunneling and
piling projects.

The capacities of GN’s shale shaker are
200GPM, 500GPM and 600GPM under the mud condition of density 1.2g per cubic
centimeter, viscosity 45s measured by Marsh funnel viscosimeter and screen of
API 40.

GN Solids Control has a 4-panel screens
shale shaker which is the largest model in GN’s shale shaker product line. This
model could be used at the oil rig site for primary solids control. At the
consideration of easy operation and maintenance as well as the widely accepted
treating capacity, GN made the model of GNZS594E-HB shale shaker to fully
meet the market request.

So, what are the advantages of this model?
Or we say what the features are?

1. Simple structure design of the shaker
deck, the operator could observe the work performance easily. The added extra
horizontal square steel strips at both sides of the deck make the deck much stronger.

2. The 2 vibrators located vertically with
the beam makes there is a longer connecting face which could distribute the G
force uniformly to the whole shaker deck.

3. Hidden design of the lead screw beneath
the shaker deck makes it available to adjust the shaker deck angle while the
shaker is running. The operator only need a ratchet wrench to adjust the deck
angle from one side of the lead screw, the other side would be adjusted at the
same time.

4. To ensure the better sealing
performance, the screen frame was installed a type embedded rubber sealing.
This rubber sealing will not be taken off with the exception of manually
disassembling.

5. Wedge blocks are used to fasten the
screen panels is also a popular method. This makes the exchanging of the screen
easier.

6. Sometimes the shale shaker could be used
as a under shaker of the mud cleaner unit. All GN’s shale shaker will have the
pre cut installation holes to install the cyclone frame. Which means GN’s
cyclone frame for mud cleaner is removable. All cyclone frame, no matter what
capacity, the installation location would be the same.

7. By changing hopper feeder, GN’s 4-panel
shale shaker could be used as a drying shaker for waste cutting management. The
G force is up to 8.

No hesitate to contact GN Solids Control
for a quote of GNZS594, especially the client from the America, as this model
is on a promotion status.

How Does the Cyclone Work as a Solids Control Equipment

The persons who are in the drilling
industry may might not unfamiliar to the cyclone unit. The cyclone units always
get into to our view as a de-sander, de-silter or even mud cleaner equipment. These items belons to the solids
control equipment which is used to recycling the drilling mud to reduce the
drilling cost, and for some environmental friendly purpose.

As per the diameter of the cyclone straight
body part, the cyclone units are divided into 2 types. The units with a
diameter larger no less than 6 inch would be call as de-sander cyclone, while
others smaller than 6 inch would be defined as de-silter unit. The cyclone unit
is working by using the centrifuge force to separate the solid phase and liquid
phase.

Generally, the cyclone unit has 3 ports,
one is used for fluids fed in, and the rest 2 are separately used for liquid
overflow and solids discharging. The cyclone body was divided into straight
part and cone part. The fluids was pumped into the cyclone under the pressure
of 0.25-0.4 Mpa along with a tangent direction of the cyclone inner wall.
Rotating inside a cyclone at a very high speed, the solids and liquids would be
layered toward the cyclone wall with solids close to the wall and liquid in the
center.

So, how can the cyclone separate the solids
and liquids? At the bottom of the cyclone, there is a discharged port which is
a small hole. The high speed rotating layered solids would get down to the
discharge part and get out as a umbrella shape, high speed rotating makes the
centre of the discharge port a vacuum where the air can get into the cyclone.
Under the pressure of air, the liquid would overflow out from the outlet at the
top of the cyclone. Normally, the bottom discharged solids would have about
20-30 degree angle, much less or more would be treated as abnormal working
condition.

GN Solids Control always adopts the 10 inch
cyclone to be the de-sander cyclone which could
separate the solids with size large 45-70 microns. The 4 inch cyclone is used
as the de-silter to remove the solids larger than 15 microns. This cut point is
a very vague data. By compositing different size cyclone and under shaker unit,
GN
solids control could provide the de-sanding and de-silting unit for various kinds of drilling projects.

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