Jun 27

As leading separation solution provider and leading manufacturer for decanter centrifuges in China, each year, GN Solids Control makes and sells around 200 sets of decanter centrifuges. Those centrifuges are mostly used in oil and gas industry like the solids control systems, waste management systems, oily sludge separation systems and large TBM projects. But in fact, the decanter centrifuges has even wider applications than the above mentioned ones. For example, in the food industry, beverage industry, edible oil industry and waste water industry. And just recently, some clients are using GN’s decanter centrifuges in power plant and it the performance was proved to be satisfactory.

Video for GN Centrifuges in power plant
Those decanter centrifuges are of big bowl centrifuges with bowl diameter of 18 inch. Same as other GN centrifuges models, this centrifuge model:

  1. use duplex stainless steel as the bowl material, and
  2. for the impeller protection and solids discharge ports, GN uses tungsten carbide tiles and special material ports for protection.
  3. GN also uses genuine SKF bearings for the centrifuges’ stable performance and longer service life.
  4. Details cannot be neglected, during transportation, GN use screws for jacking the bowls from outside, in order to reduce the load onto bearings.
  5. And the speeding up rods are used to enhance the capacity of centrifuge. Also some slots on impeller for the liquid to flow faster.

For the centrifuges with 18 inch diameter bowls, GN has different models available, with different bowl lengths, and the bowl length diameter ratios are respectively 2, 3 and 4. They are designed for different applications. And also the ones bigger and smaller than 18 inch ones, like the 14 inch bowl ones, there are also 3 and 4 as bowl length diameter ratio available, and also 22 inch ones.
The largest decanter centrifuge GN has is up to 30 inch bowls, while the smallest is 9 inch bowls.
For more information, welcome to contact GN directly.

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written by shale shaker

Jun 27

This picture with 2 sets of customized mud cleaners are for a recent project. And after being taken this picture, those 2 sets of mud cleaners will be shipped out to its owner, an offshore drilling contractor. Sure they will serve a perfect work for its owners.
Among the oil and gas drilling projects, we can divide the drilling into land rigs and offshore drillings two kinds. Both of them has higher standard than other drilling works, cause they always request for Explosive Proof standard equipment. And comparing with land rig drilling works, the offshore drillings are of higher standards because of its limited space on the offshore platform. Therefore, the offshore projects always request for higher explosive proof standards (mostly ATEX ZONE 1), more compact foot print and easier and safer lifting pads for the equipment (DNV 2.7 standards).
It is not the first time that GN Solids Control has provided such equipment for offshore projects. Before, GN has provided the shale shakers, decanter centrifuges, vertical cuttings dryers to offshore projects.

This mud cleaner has 3 desander cones and 16 desilter cones. And those cones are playing roles as the 2nd step separation and 3rd step separation, respectively for separating our particles of 40 microns and 20 microns. And there are 2 centrifugal pumps for feeding the desander and desilter cones. There is a underflow shaker of 3 pcs of screens used for drying the discharged solids phase from the desander and desilter cones. The shaker has a total screen area of 2.6m2. For this mud cleaner, and all of other shale shakers and mud cleaners, GN provide high quality composite material shaker screens. And in order to reach the standards for offshore, a special lifting frame is added to the mud cleaner for suitable lifting pads for offshore rigs.h

For more information, welcome to contact GN Solids Control freely.

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written by shale shaker

Jun 10

Just recently, GN Solids Control has delivered to a client in Middle East a batch of decanter centrifuges. It was a repeated order from the same client. And comparing with normal centrifuges, this lot of centrifuges are hydraulic decanter centrifuges, instead of electric driven ones.


Each year, GN Solids Control manufactures around 200 sets of decanter centrifuges, among which 95% are electric driven ones. But still, there are clients who prefer the hydraulic driven ones because of the extreme ambient temperature or the need of more flexible bowl speed and differential speed.
Unless the VFD controlled decanter centrifuges, the hydraulic decanter centrifuges’ feeding pump are not controlled by a VFD panel. Then, is it possible for us to adjust its speed? The answer is Yes. During years of experiences in providing decanter centrifuges, GN Solids Control has accumulated a certain pile of knowledge in centrifuge feeding pumps, especially the screw pumps. By using a manual pulley, the pump speed could be adjusted according to the centrifuge need. Such facilities are also used already with some fixed speed decanter centrifuges or even for some VFD centrifuges as an optional function of the customized pump.
GN High Quality Hydraulic Decanter Centrifuge:
In GN Centrifuge family, this hydraulic driven centrifuge is named under FHD series, which means fully hydraulic driven. Here GN is cooperating with ROTODILL for the hydraulic control panel. And this GNLW363-FHD Centrifuge is designed in a single skid for easier transportation and rig up.
GNLW363 Decanter Centrifuges: GN started the hydraulic centrifuge with the model GNLW363, which is also the best seller model among all GN centrifuges models. It has a 14 inch diameter bowl with a high speed upto 3900RPM when equipped with an electric driven. It is also the most popular model at rig sites.

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written by shale shaker

May 31

For most drilling companies, their main work is drilling only and all related drilling mud treatment works are done by other oilfield service companies, like the drilling cutting waste treatment, and drilling fluid treatment. And main equipment for the drilling cuttings separation includes vertical cuttings dryer and decanter centrifuges.
GN Solids Control are professional in such equipment providing and many international oilfield service companies are GN’s clients. For example, for the oil based mud cuttings, clients always use GN Vertical Cuttings Dryers and Decanter Centrifuges:

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  1. GNCD930D vertical cuttings dryer: this is especially designed for the oil based mud cuttings. The working principle is like the drying procedure of a washing machine. By high speed rotating, the cuttings are stopped by the screen basked and then fall down to below, while the mud are splashed out of screen basket. After separation, the oils on cutting will be reduced to below 0.5%. GNCD series cuttings dryers are also equipped with a flushing system with a flushing pump, which could help the machine from being blocked and enhance the efficiency.
  2. GNLW363-VFD decanter centrifuge. It is used to further separate the drilling fluids discharged from the vertical cuttings dryer, cause although the cutting waste from the vertical cuttings dryer are already dry, talking about the liquid discharged from vertical cuttings dryer, there are still some fine particles inside, only to be separated by decanter centrifuge. GNLW363 is the most popular model, and there are bigger models available too, like 18 inch, 22 inch and even 30 inch.
  3. During operation, the vertical cuttings dryer and decanter centrifuge should be positioned on a skid at certain height for the liquid to fall down with gravity. For this purpose, GN Solids Control designed the telescopic skids, and each skid has 3 optional heights for different conditions.
  4. Transferring equipment like the screw conveyors, kinds of pumps like the slurry pump, vacuum pump and etc.
    For a complete proposal, welcome to contact GN Solids Control directly.
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written by shale shaker

May 25

Shale shaker, mud cleaner and the decanter centrifuge are the three steps of separation in a solids control system. But in fact, they are not only suitable for solids control, they are also suitable for other industries like the waste management, and the environmental protection projects..
In traditional mind, the shale shakers are mostly used for solids control systems of drilling rigs, and they take the most responsibility to separate out the cuttings from the valuable drilling mud. And a mud cleaner is used for further treatment of the drilling cutting which are too small for the shale shaker. And a decanter centrifuge is for separate out the particles from 2 to 5 mirons.

Recently, GN Solids Control just finished the fabrication of such a system for environment protection project, including following eqiupment

  1. Shale Shaker: GNZS594-HB. This is the largest one layer shaker among GN shaker models, which has 4 pcs of shaker screens each with size 1165x585mm, total screen area is 2.74 m2. And all shaker screens are designed per API RP13C. Based on different screen mesh, the shale shaker can remove all particles larger than 100 microns.
  2. Mud Cleaner: GNZJ594-2S12N. This equipment is combined by 3 parts, the underflow shaker, desander cones, desilter cones, which can remove the particles above 20 microns. Desander cone and desilter cone each need a centrifugal pump for feeding.
  3. Decanter Centrifuge: GNLW553-VFD, this is a big bowl centrifuge among GN centrifuge models, it has a bowl made of Duplex Stainless Steel SS2304, which can bear a high G force generated by high speed rotating.
    All above three equipment are physical separation solutions, and all of above, and more, could be found among GN Solids Control’s product range. If you are not sure how to get your separation work done, welcome to contact GN for solution.
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written by shale shaker

May 16

For oil and gas drilling fluid separation projects, the decanter centrifuges are becoming more and more popular and necessary in the separations of solids control, drilling cuttings separation and drilling fluids waste management, and also, in oily sludge separation fields. Even in traditional solids control projects, the decanting centrifuges are being more and more common than before.
GN Solids Control is leading manufacturer for decanter centrifuges, with a professional workshop for decanter centrifuges. This workshop was equipped with five face producing machine for making the rotating parts, while the high speed and middle speed dynamic balancing machines for testing the balancing of the rotating parts. Here on the balancing machine, the centrifuge bowl will be tested, the centrifuge impeller will be tested and they will be tested again after being assembled.


GNLW series decanter centrifuges are made from 9 inch diameter bowl to 30 inch diameter bowl and there are fixed speed ones and VFD controlled various speeds. The most popular size is the 14 inch model GNLW363C-VFD high speed decanter centrifuge, with a highest speed up to 3900RPM. Just recently, GN has delivered a batch of this model to Russia.
This model centrifuge’s bowl is made of Duplex Stainless Steel SS2304, with enough strength for the high speed and heavy mud. The impeller is equipped with tungsten carbide tiles for protection and also the ports for solids discharge are of tungsten carbide, too. Bearings are original SKF’s for longer service life.
Vertical cuttings dryers are also popular equipment in Russia, which is widely used in OBM drilling cuttings separation. It is used for further treatment of drilling cuttings from the solids control shakers. It can reduce the oil on cuttings to 0.5%.
For more information, welcome to contact GN Solids Control directly or come to GN factory for a visit.

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written by shale shaker