KOSUN

分类： Industry Update

KOSUN exclusively manufacture solids control system,drilling mud solids control equipment,Oilfiled Solids Control,oil and gas drilling waste managemen

  • The Houston OTC Oil Exhibition

    From May 1st to 4th, the 4-person sales team led by Mr. Geng Feng, the General Manager of KOSUN, attended OTC Oil Exhibition in Houston, United States. OTC ( Offshore Technology Conference ) is held every year in U.S., through which all the producers and buyers in oil equipment industry exchange views on the latest technology. KOSUN has been attending the exhibition for three years, and made several achievements as follows:

    1. Made worldwide self-promotion. Since the OTC is the world’s largest exhibition in oil drilling equipment, and the exhibitors came from all over the world, the industry learned about KOSUN in this exhibition.

    The Houston OTC Oil Exhibition

    2. Meeting and communicating face-to-face with many end users, we got to know more users and traders of solids control products, and customer resources were accumulated. During the exhibition, a famous American company concentrating on mud back technology came to KOSUN’s stand and expressed huge interest in KOSUN’s production. They promised to come to China and visit our factory, and made agreement with us after the exhibition. On the exhibition, the general manager of the Derrick came to meet Mr. Geng Feng. They solved some problems between two sides after good communication and discussion and laid solid foundation for future cooperation. Advanced technology and equipment offered us valuble opportunity to learn, for example, the leader of shale shaker of Derrick launched its most advanced equipment-Highly Automatic 3 Layers or Multi-layers Shale Shakers. All the experiences of this exhibition were extremely helpful for us to understand the trend of the industry.

  • KOSUN Attends OTC Oil Exhibition in Houston

    From May 1st to 4th, the 4-person sales team led by Mr. Geng Feng, the General Manager of KOSUN, attended OTC Oil Exhibition in Houston, United States. OTC ( Offshore Technology Conference ) is held every year in US, through which all the producers and buyers in oil equipment industry exchange views on the latest technology. KOSUN has been attending the exhibition for three years, and made several achievements as follows:

    1. Made worldwide self-promotion. Since the OTC is the world’s largest exhibition in oil drilling equipment, and the exhibitors came from all over the world, the industry learned about KOSUN in this exhibition.

     

    KOSUN attend the OTC Oil Exhibition in Houston

    2. Met and communicated face to face with many end users. We got to know more users and traders of solid control products, and customer resources was accumulated. During the exhibition, a famous American company concentrating on mud back technology came to KOSUN’s booth and expressed huge interest in KOSUN’s production. They promised to come to China and visit our factory, and made agreement with us after the exhibition. On the exhibition, the general manager of the Derrick came to meet Mr. Geng Feng. They solved some problems between two sides after good communication and discussion and laid solid foundation for future cooperation. Advanced technology and equipment offered us valuble opportunity to learn, for example the leader of shale shaker of Derrick launched its most advanced equipment-Highly Automatic 3 Layers or Multi-layers Shale Shakers. All the experiences of this exhibition were extremely helpful for us to understand the trend of the industry.

    As a professional and leader in China oil drilling mud solids control industry, KOSUN has more than 21-year idustrial experience, we insist on manufacturing high-performance, high quality products. The solids control equipment we can provide include shale shaker, shale shaker screen, desander, desilter, vacuum degasser, centrifugal pump, submersible slurry pump, shear pump, mud agitator, mud gun, drilling fluids mud cleaner, decanter centrifuge, jet mud mixer, mud tank, diesel tank, water tank and complete solids control systems, etc.

  • Solidification’s Advantages and Disadvantages in Waste Management

    READ: You may find solidification is applied worldwide as the last phase waste management choice in the waste management flow chart. However, it is not perfect since this technology is limited in countries not strict with environmental requirements. Therefore, it has not yet won… 

    You may find solidification is applied worldwide as the last phase waste management choice in the waste management flow chart. However, it is not perfect since this technology is limited in countries not strict with environmental requirements. Therefore, it has not yet won wide recognition nowadays when environmental problems are relatively sharp.

    Solidification ( including sealing, concretion, stabilization ) describes the process to reduce the free water in cuttings and potential pollutant emission with the help of additives. It is called a process because solidifying materials are still underdeveloped. In the past, it is usually applied before burial or paving with solidifying materials. I can also be used in production of recyclable materials like bricks or air bricks. Nevertheless, its best outlook is in the production of road base materials ( mud paved under road ).

    Usually, fly ash and mud are used for cutting solidification. Many solids control products in the market claim good quality, but it still remains unproved whether it has any credibility. The problem for solidification is that there is no technological process or quality control process available. Some believe casing flocculant into cuttings is one kind of solidification. However, not many advantages can be found except reduction of free water with it as a kind of dilution.

    First of all, all the materials applied for solidification should go through leaching test. And the portion cased into cuttings should weigh the same with that in leaching test. However, it is not easy to realize since casing continuation varies. Second, the goal is that solidified materials should resemble raw materials. If brick is needed, then quality bricks should be produced; if paving materials are needed, then the materials should pass road grade test.

    When there is no local solidification and burial standards available, 29B can be referred to since it assumes the materials are solidified and buried. The standard minimized compressive strength required for tested hollow brick is 20P. After the brick is crushed, sampled fragments will be immersed into water to test its oil and salt leashing. It is regulated that oil and chloride sediments quantity be less than 10mg/L and 500mg/L. Other test methods are also available except this. It should be noted that almost all the solidifications will have no economic value when the products meet the standards.

    In a word, solidification should be considered carefully for waste treatment.

     

    Key words:

    KOSUN: Established in 1992 and headquartered in Xi’an, China, Xi’an KOSUN Machinery Co., Ltd. (KOSUN) is among the first group of manufacturers of oil drilling high-frequence shale shakers, is a specialized centrifuge producer, the pioneer in the field of solids control in China, as well as an expert in drilling waste treatment. Its business scope mainly covers China mainland, Commonwealth of Independent States, North Africa and U.S.A..

    Solids control equipment: Its performance and quality play an important role in solids control technology. Drilling solids control system mainly contains such three parts as drilling fluids circulating tank, drilling fluids purification equipment and electric control equipment, among which the drilling fluids purification equipment includes shale shaker, desander, desilter, degasser, centrifuge, centrifugal pump, agitator, mixer, etc. Cuttings recovery and waste fluids treatment equipment can also be coupled for the environmental sensitive areas.

     

  • Application of Biodegradation in Drilling Waste Management

    READ: In drilling waste management, biodegradation has become one of the most favorable solutions among oil drilling companies at home and abroad due to its less expenses and the good environmental benefits it can achieve. However, different drilling environments mean…

    In drilling waste management, biodegradation has become one of the most favorable solutions among oil drilling companies at home and abroad due to its less expenses and the good environmental benefits it can achieve. However, different drilling environments mean applications of biodegradation vary.

    Field Pic of Oil Exploration
    Field Picture of Oil Exploration
     

    Biological drilling waste treatment describes degradation and mineralization of pollutants in drilling waste by bacteria growth, reproduction and internal respiration introduction of degrading bacteria and nutrients with the introduction of degrading bacteria and nutrients. It also takes advantage of biological characteristics in practical operations such as, liquid/solid separation by means of bios and degradation by means of adding microbial flocculant.

    Field Pic of Biodegradation
    Field Picture of Biodegradation
     

    However, the practicality of biodegradation must be taken into consideration based on the local environmental conditions before formally deciding upon this treatment approach. "Indigenous" microorganisms, nutrition factors, humidity, hydraulic detention time, PH value, dissolved oxygen should all be factored into consideration before the implementation of biodegradation.

    “Indigenous” microorganisms are intrinsic microorganisms in drilling waste which do not need introduction and is comparatively economical, but is not effective in treatment. Nutrition factors play an important role in biological growth and metabolism. Therefore, drilling waste treatment needs appropriate addition of nutrition factors. Humidity is vital for biological growth and reproduction, but certainly of no significance for drilling fluids containing large amount of water. However, temperature should be kept under control. Minimized temperature is 15 degrees centigrade and the best is 30 degrees centigrade in drilling fluids treatment. Besides, for field operation of waste management, heating and insulation measures are needed for Winter and Spring and heating and cooling for Summer and Autumn. Hydraulic detention time defines how long treated wastewater stays in bioreactor. Organic pollutants in waste drilling fluids are, to a great extent, synthetic organic macromolecules which has a larger degradation rate than the other organic pollutants in wastewater, so the chosen bacteria should have better sludge loading ability. Above all, PH value and oxygen content of drilling fluids are also important factors and basic conditions for microorganisms to survive in drilling waste.

    At present, the international waste treatment primarily adopts such approaches as land cultivation method, composting method, bioreactor, microbial flocculants method, anaerobic bio-treatment method, aerobic bio-treatment method, natural treatment method ( oxidation pond ).

    Land cultivation method means to thoroughly degrade pollutants contained in drilling waste resorting to re-cultivation. It is very popular in many US and Russia drilling waste treatment sites, but it takes ages and costs a lot and is very easily affected by environment. Compositing method mainly degrades organisms by diluting drilling waste and then adding nutrients and sawdusts to attract microorganisms, which however truly is time-consuming. Bioreactor is both costly and energy-consuming since diluted and blended drilling waste and nutrient solution are put into certain tuner for adjustment of the survival factors for microorganism in order to achieve biodegradation. Microbial flocculants method makes good use of the principles of organic flocculants to solidify drilling fluids and degrade during the process. Apart from these, some drilling companies also apply anaerobic bio-treatment method, aerobic bio-treatment method, natural treatment method ( oxidation pond ) to improve on biodegradation and get good achievements.

     

    Key words:

    KOSUN: Established in 1992 and headquartered in Xi’an China, Xi’an KOSUN Machinery Co., Ltd. ( KOSUN ) is among the first group of manufacturers of oil drilling high-frequence shale shakers, is a specialized centrifuge producer, the pioneer in the field of solids control in China, as well as an expert in drilling waste treatment. Its business scope mainly covers China mainland, Commonwealth of Independent States, North Africa and U.S.A..

    Solids control equipment: Its performance and quality play an important role in solids control technology. Drilling solids control system mainly contains such three parts as drilling fluids circulating tank, drilling fluids purification equipment and electric control equipment, among which the drilling fluids purification equipment includes shale shaker, desander, desilter, degasser, centrifuge, centrifugal pump, agitator, mixer, etc. Cuttings recovery and waste fluids treatment equipment can also be coupled for the environmental sensitive areas.

     

  • Industrial Solids Waste Treatment Should Step up

    READ: Industrial civilization facilitated the rapid development of scientific technology and economy and improved people’s living standards. On the other hand, it has also been swallowing global natural resources in a stunning speed and discharging huge amount of insoluble waste, disturbing…

    Industrial civilization facilitated the rapid development of scientific technology and economy and improved people’s living standards. On the other hand, it has also been swallowing global natural resources in a stunning speed and discharging huge amount of insoluble waste, which disturbed the nature’s ecological balance and resulted in ever worse environmental crisis, exposing human survival and development to threat.

    Industrial solid waste describes the solid, semi-solid and liquid waste apart from high concentration wastewater produced in industrial production such as BF slag, steel slag, red mud, nonferrous metallic slag, fly ash, coal cinder, pyrite cinder, waste gypsum, salt sludge, etc. Along with the industrial development, industrial waste has mounted on a daily basis. Metallurgy and thermal power generation are among the largest waste-discharging industries. It is fairly difficult to manage the waste due to its huge amount, large varieties and complex composition. However, the waste can cause severe environmental pollution since it pollutes water resources, affects plant growth and endangers human fitness. Valid statistics show the total industrial waste emission in West China rose to 531.43 million t in 2007 from 243.09 million t in 2002, up average 17.4% annually. The discharging has really been intensified. Besides, since 2003 the annual emission in West China has accounted for 52% of the whole nation; though its recovery rate increased to 50.3% in 2007 from 40.3% in 2002, it still remains a lower level. It is easy to tell that the harm by China’s domestic solid waste to environment is already quite serious.

    The whole society need commit to industrial solid waste management. First of all, the governments should make continuous efforts to improve on laws and regulations to which all aspects of environmental protection can refer. Legal actions can limit some enterprises’ industrial waste emission and make them improve themselves by strengthened financial investment in waste treatment to reduce the nation’s industrial waste emission. At the same time, the country also need strengthen its investment in scientific research to facilitate the improvement of scientific and technological level and raise the level of industrial waste processing. Next, enterprises should constantly update its industrial structure and pull all energy into circulation economy development. In this way, the problems like high consumption of resources, large emission of pollutants and low level of utilization can be resolved. In the face of increasingly worse environment, we all should promote more on environmental knowledge and strengthen human environmental awareness. There is only one earth which we ought to take good care of but stain all the time since she brings us pretty rivers and mountains and clear streams. We should all do our bits to protect her.

     

    Key words:

    KOSUN: Established in 1992 and headquartered in Xi’an China, Xi’an KOSUN Machinery Co., Ltd. ( KOSUN ) is among the first group of manufacturers of oil drilling high-frequence shale shakers, is a specialized centrifuge producer, the pioneer in the field of solids control in China, as well as an expert in drilling waste treatment. Its business scope mainly covers China mainland, Commonwealth of Independent States, North Africa and U.S.A..

    Solids control equipment: Its performance and quality play an important role in solids control technology. Drilling solids control system mainly contains such three parts as drilling fluids circulating tank, drilling fluids purification equipment and electric control equipment, among which the drilling fluids purification equipment includes shale shaker, desander, desilter, degasser, centrifuge, centrifugal pump, agitator, mixer, etc. Cuttings recovery and waste fluids treatment equipment can also be coupled for the environmental sensitive areas.

     

  • Techniques on Drilling Sewage Treatment

    For offshore drillings, one of the biggest drilling waste is sewage which grows out of drilling fluids, rain, water used to wash bits and cooling water. Usually, the under-treated sewage weighs 30 times the well-bore volume. Therefore, sewage minimization is a very vital part in the whole waste treatment.

    However, as the easiest waste resource to be reduced, water can be reduced in such ways as below:

    One-way cooling system can save water and seal it inside the system while eliminating cooling water, braking water and sealing water to achieve water recycling. It is proved that it is not pricey to recycle the water and is able to save a large amount of liquids.

    The reason that rain can be recycled is the correlation between drilling fluids and water. Rain is applicable in washing drilling equipment. The water used to wash drilling equipment can flow into water tank just like rain and should be recycled till it cannot function any more. It will be surprising to see how many times they can be reused.

    The dirtiest water ( such as, deserted drilling fluids ) can be applied to wash the panel. Desander and filter can produce massive deserted drilling fluids( usually there is one portion of solid phase in 2 or 3 portions of fluid phase ). They can be used to wash drilling mud tank. And shale shaker and decanter centrifuge also need washing water. Water used to clean panel do not need purifying since it is not necessary to wash away solid phase and liquid phase with clean water. It will be very difficult to separate them during treatment procedure.

    It is necessary to produce sewage. It is quite expensive to treat sewage, so vacuum device is preferable to washing water here. A gun-shaped controller with tube is a good idea. The tube falls and automatically closes the connection to disconnect the controller. Drilling operators prefer high-pressure, small-volume washer due to the less labor intensity, better washing effects and reduced sewage volume. Generally speaking, both the vacuum device and washer are put into use when treatment is not costly. However, the gun-shaped controller will offset the cost.

    Different approaches can be conducted to separate and treat waste, for instance, water-based waste and oil-based waste can not blend until being managed together. During the operation, fluid from drilling mud pits should be reinjected so as to flow into spare drilling mud pits.

     

    Key words:

    KOSUN: Established in 1992 and headquartered in Xi’an China, Xi’an KOSUN Machinery Co., Ltd. ( KOSUN ) is among the first group of manufacturers of oil drilling high-frequence shale shakers, is a specialized centrifuge producer, the pioneer in the field of solids control in China, as well as an expert in drilling waste treatment. Its business scope mainly covers China mainland, Commonwealth of Independent States, North Africa and U.S.A..

    Solids control equipment: Its performance and quality play an important role in solids control technology. Drilling solids control system mainly contains such three parts as drilling fluids circulating tank, drilling fluids purification equipment and electric control equipment, among which the drilling fluids purification equipment includes shale shaker, desander, desilter, degasser, centrifuge, centrifugal pump, agitator, mixer, etc. Cuttings recovery and waste fluids treatment equipment can also be coupled for the environmental sensitive areas.

     

  • How to Achieve Zero Disposal of Drilling Waste?

    The first dozen years of 21st century saw rapid development in China and the whole world. Mechanical industry’s leading development has been driving up the demand for oil that led to thousands of oil projects, whose pollution also created tons of trouble to Earth’s environment. Here provoked a problem that needs a careful think of all oil explorers when environmental protection is being ever touchy nowadays,“ What should be done to make oil drilling more environment-friendly?”

    First off, we need to ask ourselves “how should we achieve zero pollution in oil drilling?”

    At the beginning of last century, drilling fluids concocted by chemical compounds were largely applied while drilling boreholes for improvement of its safety and efficiency. Drilling fluids have been especially useful in carrying out drill cuttings, providing hydrostatic pressure to prevent formation fluids from entering into the well bore, cleaning the bottom of wells, preventing oil and gas from flowing up the wells, keeping the drill bit cool and clean during drilling, etc, which has made it the “blood” of drilling equipment. However, just like every coin has two sides, it will turn into poisonous “blood” when it is discharged onto soil with cuttings since it may contain soluble inorganic salt, heavy metal, organic hydrocarbon ( oil substances ), etc, which could easily be made harmful via rain immersion and river brush to the surrounding soil, water source, farmland and air.

    It is expected that our tentative efforts would make drilling waste management perfect, but the facts did not turn out so. Pollution resulted from oil drilling is still swallowing our healthy environment bit by bit and the problem is still vexing our nerves. Nevertheless, we cannot do without it because the drilling fluids have already been the “blood” in the industrial era.

    Xi’ an KOSUN Machinery Co., Ltd. who has been specialized in oil drilling machines began seeking for solutions on site in order to truly green oil drilling. Waste disposal was the biggest problem for oil drilling contamination. We need to minimize it and even better, zero it, then we can achieve greening of oil drilling.

    Via 20-year grueling efforts from 1990s to early 21st century, KOSUN has developed oil drilling solids control system and waste management equipment and has set up an integrated waste management solution system by combination of domestic and foreign treatment experience learnt on site.

    This solution would deal with disposal at the source by means of solids control equipment, dewatering purification equipment and waste management equipment.

    The first part—solids control equipment, comprising shale shaker, vacuum degasser, desander, desilter, decanter centrifuge, is directly connected to mud pumps. The drilling mud drawn out from well will go through the four phases of solids control system. Afterwards, it will be used again and the disposal is minimized at the same time.

    The next part after solids control is dewatering and water treatment, via which water may be effectively recycled. If they are applied in water-scarce area, large amount of water would be saved and waste disposal reduced.

    Then, screw pump or screw conveyor may transport dewatered waste to Hi-G Dryer and Vertical Centrifuge, waiting to have solids and liquid separated again. Hi-G Dryer’s high spinning speed and effective treatment will produce very dry dregs, recover partial drilling fluids and recycle resources.

    In the end, the dregs will be further treated by means of solidification, cutting injection, biodegradation, thermal desorption according to the actual situation on the site of drilling and the composition of dregs.

    Drilling waste disposal will be reduced to almost zero after going through the system, effectively satisfying the demands for zero disposal and the state environmental protection regulations, solving the vexing problems in oil drilling, and truly fulfilling the wish of “green drilling” in oil industry.

     

  • NOV Announces Deal of 7 Drillship Equipment Packages

    National Oilwell Varco, Inc. ( NYSE: NOV ) announced today that it has signed contracts to supply drilling equipment packages for seven drillships to Estaleiro Atlantico Sul ( "EAS" ), including drilling riser and pressure control equipment. The value, over the term of the deliveries, is approximately $1.5 billion.

    Pete Miller, Chairman, President and CEO of National Oilwell Varco, stated, "We are pleased to have been selected as the drilling equipment supplier for this prominent project, and excited to work with one of Brazilian premier shipyard companies, EAS. Brazil’s extraordinary deepwater discoveries of the past several years have transformed it into one of the most significant offshore markets we serve, and one we expect to continue to grow. We are investing heavily in Brazil to manufacture more of the products and technologies National Oilwell Varco provides to our oil & gas customers, and to service the rapidly growing installation base of NOV drilling equipment in the region.

    NOV Announces Signing of 7 Drillship Equipment Packages

     

    "Congratulations to our Rig Technology Team on securing the largest single order in our company’s 150-year history!"

    National Oilwell Varco is a worldwide leader in the design, production and sale of equipment and components used in oil & gas drilling and production operations, the provision of oilfield services, and the supply of chain integration services to the upstream oil & gas industry.

    Statements made in this press release that are forward-looking in nature are intended to be "forward-looking statements" within the meaning of Section 21E of the Securities Exchange Act of 1934 and may involve risks and uncertainties. These statements may differ materially from actual future events or results. Readers are referred to documents filed by National Oilwell Varco with the Securities and Exchange Commission, including the Annual Report on Form 10-K, which identify significant risk factors which can cause actual results to differ from those contained in the forward-looking statements.

     

    SOURCE: NOV

     

  • Shake Shaker for Drilling Mud System—Important Drilling Solids Control Equipment

    Shake shaker is the important drilling solids control equipment, used as first stage solids control equipment. There are some tips of using it in the operation processes.

    1. Shale Shaker Deck Angle Adjustment

    The shale shaker deck angle ranges between -1 ~ +3° and its rated angle is 0~ +5°. There is lifter, pipe, lifter pipe, scale indicator, scale, connection plate, etc. When we make adjustment, if the wheel rotates in a clockwise direction, then shaker deck angle will be larger; if the wheel rotates in an anti-clockwise direction, shaker deck angle will be smaller.

    Shale shaker output angle adjustment can be operated under running and off. When the shaker finishes delivering it, the shaker deck is 0°. When user operates shaker, according to drilling mud property and flow rate on job site, and adopts same screen, the angle is higher, the treating performance will be better while treating capacity will be higher. When drilling fluids is leaking on shaker deck, increased deck angle can let fluids flow away.

    Shake shaker for drilling mud system is a important drilling solids control equipment

    2. Shale Shaker Screen Replacement

    To make shale shaker screen installation and uninstall easier, the fast installation structure was designed. The structure is a special type using tension wedge to fix screen. Refer to fig IV. The structure is composed of shelve strip and wedge. The first screen installation, we should inspect the screen dimension, such as 1250±2mm, the tolerance can’t go beyond that. After fixing rubber strip, put screen and shelve strip from shaker back (drilling fluids input), and push wedge evenly on two sides by using hammer to push or tension wedges so that two sides are made identical. Tension each screen subsequently.

    Replace the shaker screen during operation, when screens are broken or need to be replaced, please refer to fig IV. Get wedge out, then bring out screen, check if rubber strips are sufficient; then put new screen on shaker deck and tension it steadily. Then replacement is finished.

    About KOSUN

    KOSUN is a professional drilling fluid solids control equipment manufacturer in China, which was established in 1992. KOSUN can supply shale shaker, vacuum degasser, drilling fluid mud cleaner, desilter, desander, decanter centrifuge, centrifugal pump, screw pump,mud tank, jet mud mixer, diesel tank, shear pump, mud agitator, mud gun, water tank, etc. KOSUN has spread its products over oilfield drilling companies, engineering service companies and machinery plants affiliated to CNPC, Sinopec and CNOOC in China market. KOSUN’s solids control equipment have been exported to the following regions: All-Russia Region, including Russia, Kazakhstan, Uzbekistan, Azerbaijan, Ukraine, Turkmenistan, Kyrgyzstan,Tajikistan, etc.; East Asia and South Asia, including Pakistan, India, Indonesia, Thailand, Burma, Malaysia, etc.; the Middle East and North Africa, including the United Arab Emirates, Kuwait, Egypt, Algeria, Libya, Sudan, etc.; America, including the United States, Canada, Mexico, Brazil, Columbia, Venezuela, etc.; Australia; Germany in Europe.

  • KOSUN Drilling Decanter Centrifuge Applied in Oilfield

    Decanter centrifuge is really one of the most useful machines, because it has found wide application in many industries. The commonest industries include oil well drilling, biological wastewater treatment, food processing, chemical slurry and other fields. It is used to extract particles from liquids.

     

    KOSUN drilling decanter centrifuge applied in oilfield application

    Now, let’s have a look at the function of oilfield decanter centrifuge. In oil & gas industry, decanting centrifuge is the core part separating cuttings from drilling fluids. It is vital to the process of drilling projects. So, in order to improve the project efficiency, the companies should adopt excellent drilling decanter centrifuge.

    KOSUN is a professional solids control equipment manufacturer producing highly efficient drilling mud shale shaker, drilling fluids mud cleaner and drilling decanter centrifuge as well as necessary components of oilfield solids control equipment. KOSUN DC Series Decanting Centrifuge is excellent in making a separate suspended cuttings above 2μm in diameter. Besides, the decanting centrifuge is able to operate stably with the whirling speed ranging from 0 to 3900 and generate centrifugal force of 3000G.