Tag Archives: Decanter Centrifuge

10 Sets Fully Hydraulic Drive Centrifuge for Drilling Mud  to North Africa 

GN Solids Control, the sister company of GN Separation, is one of the leading brands in oil and gas solids control industry. Just as the separation solutions GN Separation provided to clients, decanter centrifuge is also one of the core products GN Solids Control offer to the clients. Decanter centrifuge is a kind of efficient equipment for solids and liquid separation purpose, and each year, GN manufacture and sell around 200 sets of decanter centrifuges. Just recently, GN has delivered 10 sets of fully hydraulic decanter centrifuges to a client in North Africa.

2023.10.26 FHD Decanter Centrifuge 2

GN has a wide range of decanter centrifuges, the bowl diameter sizes are from 9 inch to 30 inch, in order to achieve different capacities. And for each bowl diameter, GN has bowl length-diameter ratios of 3 and 4 for option, in order to meet the different applications. Considering the different control types, there are electric driven models and hydraulic drive centrifuges. Among the electric driven ones, there are fixed speed models and VFD models for option. This time, the client from North Africa chose the fully hydraulic drive centrifuges, 10 sets in one purchase.

Comparing with electric driven centrifuges, the hydraulic drive centrifuges are more fluent in operating and are more suitable for extreme conditions such like the high temperature ambient in Middle East and Africa. GN Solids Control is one of a few centrifuge manufacturers who can make the fully hydraulic control panels. Normally, GN makes the hydraulic control panels for the 14 inch bowl decanter centrifuges and 18 inch big bowls. GN Brand is quite popular among the centrifuge end users in oil and gas industry, waste water industry, and mining.

You can find GN products in more than 90 countries in the world. And if you plan to buy from GN, you can contact GN branch companies in USA, in Australia, and in Russia. Also you are welcome to contact GN partners in lots of other countries. Welcome to contact GN for the nearest contact or you can also talk to GN Headquarter directly.

GN Headquarter is located in Hebei Province China, with 3 factories. The newest one is also the largest one, with 80000 square meters’ area and advanced facilities as blanking machines, automatic welding and large sandblasting and painting.
For more information, welcome to contact GN directly.

Several Packages of Vertical Cuttings Dryer System for Overseas Client

Oil field equipment and systems are always one of the core products of GN Solids Control, which still occupies more than one third of GN Group’s products each year. For oil and gas industry, each year, GN makes and sells 250+ sets of shale shakers, 150+ sets of decanter centrifuges, and 50+ sets of vertical cuttings dryers. Recently, GN Solids Control just delivered 2 sets of waste management systems to Russia and 1 set of such systems for South America.

1. Vertical Cuttings Dryer. Comparing with shale shakers and decanter centrifuges, the vertical cuttings dryers are not so commonly known equipment, but in fact, in drilling cuttings waste management systems, they are quite practical, especially in case of oil based mud. GN’s first set of vertical cuttings dryer was designed and made into reality in year 2014, and it was soon recognized by clients and became popular all over the world. GNCD series vertical cuttings dryer can reduce the oil on cuttings to 0.5%.

Decanter Centrifuge 2023.08.14

2. Decanter Centrifuge. After the vertical cuttings dryer, there will be a decanter centrifuge to treat the fluids discharged from the vertical cuttings dryer, because there are still some fine particles in the drilling fluids at this stage. A high speed decanter centrifuge is efficient to remove the particles from 2 to 5 microns thoroughly. After the decanter centrifuge, the drilling fluids would be clean enough to be returned to the drilling procedure.

The combination of vertical cuttings dryer plus high speed decanter centrifuge is a must in many countries in the world considering the environment protection purpose. The recent projects GN manufactured are respectively made for Russia and South America. In fact, GN Solids Control has exported the equipment and spare parts to more than 90 countries in the world during the past 15 years. For the oil and gas solids control and waste management, GN can provide a turn-key solution from the consulting to manufacturing. Many world leading drilling companies and oil service companies are clients of GN.

GN Solids Control System for oil drilling to India Company

Solids Control equipment and system are always the core products for GN Solids Control. As is clearly shown, the Solids Control is the main parts in GN’s company name. Each year, GN designs and sells tens of complete solids control systems to lots of oversea countries. Sometimes, GN makes the equipment sets for a whole solids control system for clients to build up their own mud tank systems in their own facilities. This system is a complete drilling fluids solids control system for a client from India. It is a repeated order from GN old customer.

2023.06.15 Decanter Centrifuge

This drilling fluids solids control system contains following equipment:

1. Double deck shale shaker GNSZ706J. Shale shaker always shows up in the first stage to remove the largest share of drilling cuttings. Comparing with a single deck shale shaker, a double deck shale shaker can increase the treating capacity by 30%. The drilling mud falls onto the upper deck of shaker with comparably coarse screens for the 1st separation, then onto the lower deck with finer screens for the 2nd separation.

2. Vacuum degasser GNZCQ270. A degasser is used to remove the gas bubbles from the drilling mud. It can help to protect the pumps after the vacuum degasser. GN Vacuum degasser has a special design which doesn’t need an additional feeding pump. It is always located after the shale shaker and before the desander and it can also plays the role as a large mud agitator.

3. Desander GNWSJ-2S. This is a desanding unit without underflow shaker. It is fed by a centrifugal pump and is used to remove particles larger than 40 microns.

4. Desilter GNZS752-12N. Desilter cyclones are used to remove particles larger than 20 microns, and it is also fed by a centrifugal pump. This one is equipped with an underflow shale shaker with 2 pieces of screens.

5. Drilling fluids decanter centrifuge GNLW363D. Decanter centrifuge is used to remove the fine particles from the drilling liquid, ranging from 2 to 5 microns.

6. Mud tank system including centrifugal pumps and mixing hopper.

Based on your own standards and requests, GN team can give customized solutions.

A batch of GN Mini Decanter Centrifuges to be delivered to European Customer

Decanter centrifuges are widely used in various drilling industries for the separation of solids and liquid, including the oil and gas drilling, geothermal drilling, diamond drilling and pipe jacking. Based on different requested drilling capacities, there are different sizes of centrifuges for option. This time, for this European customer, GN provided a decanter centrifuge of 9 inch diameter bowl, which is the smallest model among GN Centrifuges.

2023.02.24 Mini decanter centrifuge

1. GNLW223 Decanter centrifuge. It is also called a baby centrifuge among all GN centrifuge models. The length diameter ratio is 3, which is a typical value for drilling mud separation works. The largest RPM it can reach is 4500RPM, and it can efficiently remove all the particles from 2 to 5 microns.

2. Applications of GNLW223 decanter centrifuge. GNLW 223 decanter centrifuge is small but popular. It is widely used among GN clients in diamond drilling projects, geothermal well’s drilling, HDD projects and animal waste treatment. It is a compact model especially in North America and Europe.

3. Special design for this batch of GNLW223 decanter centrifuges. When the centrifuge is put into use, it should be put on a certain height in order to discharge the liquid and solids. That’s why there is always a skid, sometimes telescopic, under the decanter centrifuge. For this batch of decanter centrifuges, GN designed a small tank below the centrifuge, together with half height as the standing frame. The small tank could be a catch tank for holding the discharge liquid. While transportation the solids discharge chute can be folded between the tank and centrifuge. The tank is open top for easy observation and to clean. Near to the bottom, there is a port as drain port.

For more information, welcome to contact GN Separation directly.

How to Choose a Suitable Solution for a Drilling Waste Management System

According to the environment protection laws and regulations in many countries, the drilling waste management system is mandatory for a drilling rig’s solids control system. A complete drilling waste management system includes 2 systems, one is to treat the drilling cuttings discharged by the solids control shale shakers, which is used for reduce the cuttings for a safe discharge, and also for recovery of the drilling fluids. The other is drilling fluids waste management, which is used to remove the extra particles in the drilling fluids after a long time recycling in a solids control system.

2022.08.15 Solids Control Centrifuge

1. Drilling cuttings waste management system. In a word, this system’s first mission is to minimize the cuttings to be discharged. Based on different mud type, the first separation equipment is different.

1.1. For oil based mud, which is used in most of drilling fields, a vertical cuttings dryer is more efficient. A vertical cuttings dryer is a high speed rotating machine which uses the centrifugal force to splash the liquid to through a mesh while the same mesh is used to block the cuttings. GNCD930 series vertical cuttings dryers can reduce the oil on cutting to below 5%.

1.2. For water based mud, a high G drying shaker is a better choice. It is similar as a shale shaker. And the main differences from a solids control shale shaker are: a high G shaker has a larger G force and the feeding of a high G shale shaker is like a hopper.

2. The second step for separation, for both the OBM cuttings and WBM cuttings is always a high speed decanter centrifuge, which is used to remove the finer solids particles in the liquid after the first equipment’s work. Unless a solids control centrifuge, this centrifuge for drilling waste management is always equipped by a VFD control panel, which is more flexible for variable mud condition.

Next time we will talk about the drilling waste management system.

Drilling Mud Solids Control Centrifuges for Africa Clients

Africa is a wide and beautiful land with rich resources including the gold mines and black gold mines, the crude oil. During exploration of the crude oil, the environment protection should be fully taken into consideration, for example, in the drilling mud, there are drilling cuttings to be removed and chemicals to be safely discharged. In this case, an efficient solution for solids control system is quite important. In all countries, the solids control system and drilling waste management system are legally requested.

GN Solids Control, as a professional manufacturer for decanter centrifuges and solution provider for solids control and waste management systems has been cooperating with many companies in Africa. This time, just in last week, GN Solids Control has provided to a client in Africa with a drilling mud solids control centrifuge.

What functions could a decanter centrifuge to serve in a solids control or waste management system for oil and gas drilling?

Solids Control Centrifuge

1. Decanter centrifuge are always located as the 4th stage for solids control, after the desilter cones. Before the centrifuge, there are shale shakers, desander cones and desilter cones, each has a smaller cutting point than last stage. A middle speed decanter centrifuge is always used for recover the expensive barite in the drilling mud.

2. If there is a 5th stage for separation as in many high configuration solids control systems, it should be a high speed centrifuge, too. This centrifuge is used to separate out the cuttings from 2 to 5 microns in the drilling mud.

3. As in many countries in Africa, where there is a drilling rig, along with the solids control system, there should be a drilling cuttings waste management system containing s vertical cuttings dryer and a decanter centrifuge. The vertical cuttings dryer is used to remove the oil on cuttings and the high speed centrifuge is used to remove the small particles in the recovered mud from vertical cuttings dryer.

Those above mentioned equipment are all within GN’s product range. Welcome to consult from GN Sales Team.

Two Sets HDD Mud Cleaning System for SINOPEC

HDD is a quite common way for pipeline works in cities or for pipelines across the rivers or so. This word is short for horizontal directional drilling. Just as other drilling, the drilling mud is to be used for HDD and the drilling mud should be well treated and prepared for reuse. A complete mud cleaning system for HDD always includes following steps for separation:

2022.08.04 HDD Mud Cleaner
1. Shale shaker. In many mud cleaning systems or so called solids control systems, the shale shaker is always the first step for separation. It is used to remove most of particles and also the largest particles. In those 2 systems GN recently made for SINOPEC, the shale shakers are GNZS703F. This shaker model is quite popular in HDD projects and also used for oil and gas solids control systems. It has a screen area of 2.63 square meters provided by 3 pieces of shaker screens each sized 1250*700mm.
2. Mud cleaner. In fact, in an HDD mud cleaning system, there are always desander cones and desilter cones. Desander cones are of 10 inch diameter, which is used for removal of particles larger than 40 microns. And the desilter cones are of 4 inch diameter for removal of particles larger than 20 microns. A mud cleaner is a combination of desander cones and desilter cones, with a shared underflow shaker for drying.
3. A mud mixing hopper is a must for a HDD mud cleaning system, which is used for adding the loss components into the recycled drilling mud in order to prepare the drilling mud for the future drilling. A mud mixing hopper has a hopper and a centrifugal pump, the hopper can be located together with pump by the mud tank, or on tank top with the centrifugal pump on tank bottom.
4. A decanter centrifuge, which is not a must but quite efficient in high configuration systems. A middle speed centrifuge like GNLW452D is used to remove particles from 5 to 7 microns. And a high speed centrifuge is used to remove particles from 2 to 5 microns.
Welcome to consult GN for more information.

Equipment Used for Feeding and Discharging for Decanter Centrifuges

Decanter centrifuges are quite important and efficient equipment used for separation of liquid and solids only second to the shale shakers. By the high G force generated by the high speed rotating of centrifuge bowl, the liquid will be splashed and the solids phase is to be pushed out. For achieving a satisfactory separating result, we have to make sure there are suitable equipment for feeding the decanter centrifuge and some other facilities for discharge.
Decanter centrifuges request for stable feeding, so some pulse pumps are not suitable for feeding the centrifuges. The pump shall provide stable feeding capacities. And it would be better if the feeing volume can be adjusted as per the centrifuge speed.

2022.05.11 GNLW454ET Decanter Centrifuge 1

Normally, based on rich experience as a decanter centrifuge manufacturer, GN Solids Control normally suggest those two pumps for centrifuge feeding as below:

1. Screw pump, which is a kind of Mono pump. Inside the screw pump there are one stator and one rotor and the comparative move between them provides stable feeding volume for the centrifuge. GN VFD centrifuges’ control panels can include a control panel for the centrifuge feeding pump.

2. Submersible slurry pump is also used for centrifuge feeding purpose, mostly for constant speed centrifuges, especially when the centrifuge is located on a tank and when the tank’s space is limited.

GN has both pump types available for matching different centrifuge models.

For centrifuge discharge, normally the liquid phase after separation will flow directly to its containers with a level difference. That’s why the centrifuge is requested to be mounted on a certain height, for example, on a tank or on a skid. The solids phase discharged by the centrifuge can flow directly via a chute or be carried out by a screw conveyor below the centrifuge.

For more information, please contact renee@gnsolidscontrol.com.

Mini Solids Vacuum Pump and Mini Decanter Centrifuge for International Customer

When you talk about something mini, what do you think? For example, a mini iphone 13, what image do you think? Yes, of course, a mini something means the same function with a more compact structure, a portable one or at least more flexible one. Have you ever considered a mini solids vacuum pump or a mini decanter centrifuge? In fact, just days ago, GN has supplied to an international customer such equipment, both in mini sizes, a vacuum pump and a decanter centrifuge.

2022.04.01 Mini Solids Pump

1. Solids vacuum pump. A solids vacuum pump is a quite powerful pump which is used for transferring medium with large particles. It is widely used in many different applications and places because of those features: first, it allows material with quite large particles with only limit as the pump’s pipeline diameter. Second, it can transfer to a quite large distance, for example, a small pump can transfer water to 500 meters away horizontally, and a large pump of 40cbm per hour, can even transfer water to 1000 meters away. Thirdly, it is suitable for different Explosive Proof conditions cause it is not driven by electricity.

A mini vacuum pump is equipped by wheels and a handle, which is flexible to be used for tank bottom cleaning by insert its inlet pipe into the tank.

2. Decanter centrifuge. Decanter centrifuges are quite efficient machines used for separating the solids particles from liquid thoroughly. The cutting point is determined by the bowl rotating speed. A middle speed decanter centrifuge can separate particles from 5 to 7 microns while a high speed one can remove particles from 2 to five microns. The decanter centrifuges’ capacity depends on the centrifuge size, especially the bowl diameter. The larger diameter it has, the larger capacity it can handle. A mini decanter centrifuge in GN equipment range is a 9 inch diameter one, and GN has all popular models available, such as 14 inch, 18 inch, 22 inch and even 30 inch.

This client who purchased both mini vacuum pump and mini centrifuge is planning to use those equipment for tank cleaning, respectively for pumping out and treating of the sludge.

Liquid Mud Plant Provided by GN Solids Control

Liquid mud plant is also called LMP, which is used for preparing, storage and treatment of the drilling mud. In a complete liquid mud plant, there should be 3 mainly drilling mud tanks for different purpose:


1. Mixing Tank.

Mixing tanks are always cuboid shaped mud tanks equipped by mud mixing hoppers. Those hoppers are always Venturi hoppers linked to centrifugal pumps. When pump is sucking mud from one compartment to another, and when mud is passing the Venturi hopper, there will be a sucking force to suck in the chemicals from the hopper.
Mixing tanks have mud agitators and mud guns, too, for stirring up the mud in order to prevent settling down. Meanwhile, there are also pumps for transferring the prepared mud from mixing tank to others.

2. Treating tanks.

When used mud is delivered to the liquid mud plant, the dirty mud shall be treated by separation equipment in order to remove the particles and to be returned to the storage tanks. The separation equipment are mainly shale shakers and decanter centrifuges, and when there are extra fine particles, there should be chemical dosing for flocculating.

3. Storage tanks.

Storage tanks are not complicated in pipelines and always using single guardrails. There are no divided compartments inside a storage tank and the most commonly used equipment are mud agitators and mud guns. Both mud agitators and mud guns are used continuously for stirring the drilling mud from being settled down to the tank bottom. Clean mud will be safely storage in those tanks.

GN Solids Control has 2 kinds of storage tanks available, the cuboid shaped ones and the cylinderic ones, each type has its own advantages.

If you have such project or tender, welcome to contact GN team for consultancy or quotation.