desander | GN Decanter Centrifuge

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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GN Centrifugal Pump to Deliver Drilling Fluids

GN solids control distinguishes
itself from other China’s manufacturers by its cost-effective product with
competitive price to USA/EUEOPE brand but with fine and stable performance.
Beside supplying solids control equipments such as shale shaker, desander, desilter, mud cleaner, and decanter centrifuge, GN solids
control also supplies centrifugal pumps to deliver drilling fluid.

With stable performance and long service
life, GN SB series centrifugal pump is designed to deliver abrasive, viscous,
corrosive media, especially drilling fluids and industrial slurry. The pump can
handle large volume flow up to 320m3/h, withstand high temperature, and
remarkably save energy, but is easy to maintain. Currently, GN centrifugal
pumps are operating widely both on onland and offshore drilling rigs around the
world. Taking drilling fluids’ condition into consideration, we are committed
to offer the best solution to our customers.

The housing of GN centrifugal pump is thicker,
heavier and solider because of the special strength when compared with
conventional pumps, thus enjoying a more durable and longer service life.

The annular flow channel inside the housing
will eliminate turbulence and cavitation, also reduce radial load on the
bearing. The housing gasket is recessed to prevent fluids from leaving the
impeller. In oil and gas field, centrifugal pumps are mainly used as feeding
pumps to desander, desilter or mud cleaner, mud mixing pump, and supercharging
pump to mud pump. Regarding to the first application, the liquids discharged
from shale shaker will be delivered to the desander, desilter or mud cleaner by
the centrifugal pump, always horizontally installed on the skid of mud tanks.
To the second, the chemical will be added when the centrifugal pump discharges
the fluids out, usually fixed below the mud mixing hopper, also on the skid of
tank. For the third, the centrifugal pump will be used as supercharging pump
for mud pumps.

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The 5 steps purify drilling mud

Drilling mud purifications
is the basic to insure the function of drilling bit works properly and safely
for both oil rig equipments and many operators working around the clock in the
drilling field. Needless to say, it is a
very costly operation if one or many steps of drilling operation go wrong, It
will leads operation cost of drilling rig go double in very short amount of
time that leads to increases of operation cost and late leads to increase the
production cost of oil.

The first level of purification

The mud feed in the shale shaker. The allocation drilling fluid
enter into the bottom of the drilling well under the foundation of the drilling pump
and carry drilling debris return the ground,
through the feeding enter into the shale shaker, the larger solid debris in drilling fluid are filtered through shale
shaker screen.

The second level of purification

When drilling fluid have debris and also contain gas, The use of vacuum degasser remove the gas which in the
drilling fluid and can recover the density of drilling fluid, calm the drilling fluid viscosity.

The third level
of purification

The drilling fluid is disposed by two level purification enter into the desander. Through the desander feed into the liquid pump, the harmful sold phase which the diameter
is above 40-60um is separated in desander.

The fourth level of purification

The drilling fluid is disposed by the three level purification enter into the desilter
through the desilter feed into the liquid pump, the harmful sold phase which the diameter is above
15-40um is separated in desilter

The fifth level of purification

The drilling is disposed by the four level purification enter into the decanter centrifuge through the centrifugal feed liquid pump, the
small harmful sold phase particles are separated in decanter centrifuge

GN Presentation

Hebei GN Solids Control Limited Company is a China & USA based
manufacturer of complete line solids control equipment; waste management equipment and shaker screens. Though
established in 2007, GN solids control has been growing fast and stably:

1. GN solids control
occupies the largest portion in the international market among all China’s manufactures;

2. Already exported
to over 60 countries, 70% turnover comes from export;

3. Firstly set up USA based branch with warehouse
among all China’s solids control manufacturers

4. Partners in
Australia, the Middle East, and the Latin America have been developed.

5. A GN brand
achieved with the target to medium-high end customers;

Mainly, GN product line includes:

Solids control equipment-shale shaker, vacuum degasser, desander,
desilter, mud cleaner, and decanter centrifuge, also mixing device such as mud
hopper, agitator and mud gun;

Auxiliary pumps, safety device-mud gas separator and flare
igniter.

Waste management equipment- high G shaker, vertical cutting dryer, decanter
centrifuges;

Shaker screens with a specialized facility to produce, also replaceable screens for all famous brand shale shakers.
Mainly applied in Mining and industrial field, oil and gas drilling; HDD or CBM
drilling;

Always, people may not trust blank words on the high quality, so
GN powerful facility will say; GN professional certificates will say.

GN owns a 65000 square meters manufacturing facility in a
well-developed industrial area, near to Beijing, 40km to Beijing International
Airport. After the presentation, we’ll show your around all workshops one by
one: firstly warehouse, workshop 1 for raw material processing; workshop 2
assembly, workshop 3 for centrifuge and vertical cutting dryer where CNC
machines are used to control quality and increase productivity, workshop 4 for
painting with ball blasting machine and auto powder coating line.

Wide yard to place big project such as solids control system and
over 30 sets decanter centrifuges.

GN America Branch with warehouse;

Also specialized factory in Asia largest wire and mesh city to
produce screens for GN shaker, also for famous brand shakers such as Derrick,
MI-Swaco.

New factory especially for centrifuges is close to be finished,
ready for operation one or two month later.

GN is the first API certified solids control manufacture in China,
also certified by ISO 9001:2008, DNV CE. Russia TR&TC, HSE for safe
production; also ATEX IECEX for electric control panels.

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Big Bowl Decanter Centrifuge Used for HDD Mud Recycling System

In a common and normal and most cases’ HDD mud recycling unit or systems, there
are separation equipment like shale shaker and desander cones, and a jet mud
mixer for mixing new material into it. But seldom centrifuges used for an HDD
mud system.

In a recent order of GN, China CPP ordered 8 sets of highest
standard 500GPM mud recycling system combined by 2 tanks. One tank is for shale shaker and desanders, the other is
for 2 sets of centrifuges. But the centrifuge tank and the application of the 2
centrifuges are for option, not only mean that this design is for option, but
also that on jobsite work, the operators could choose to use the centrifuges or
not, in order to get different standard fine mud.

These centrifuges are big bowl centrifuges of 18 inch
diameter bowl, which was economic configuration model in GN’s centrifuge family and was designed at a
middle speed of 1800RPM and used mostly in solids control systems for oil
and gas drilling for barite recovery. In this design of the HDD system, it
is used for separate out the particles larger than 2 microns and was customized
to have a VFD control panel to enable the speed to be in range of 0 to 1800
RPM.

In the standard high configuration designs of GNMS-200G,
GNMS500G and GNMS-1000G systems, there are separation equipments like shale
shaker, desander, desilter and mixing devices like jet mud mixer. But if you
think the centrifuge is necessary per your jobsite, we could recommend the most
suitable centrifuge for you. We have 9 inch, 14 inch, 18 inch and 22 inch bowl
diameter centrifuge for option. And for the most popular model GNLW363 14 inch
bowl decanter centrifuge, GN has both fixed speed and VFD control panels
available. For other size decanter centrifuges, some are designed for fixed
speed while some are VFD controlled, but they all have another optional choice.

For more question or may you have inquiry, contact us
freely.

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