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  • Notes on CNQ100 KOSUN Desilter Assembly and Adjustment

     KOSUN Desilter is the third-phase drilling fluids solids control equipment, used to separate solid particles between 15 and 44 μm in diameter. Its cones are made from polyurethane materials and have long lifespan. Desilter has a clamp structure which makes it easy to maintain.It is compact and takes up small footprint. Drilling Desilter, Drilling Desilter Cones. 

    Notes on CNQ100 KOSUN Desilter Assembly and Adjustment

    1. Connect the stock outlet of centrifugal pump and stock inlet of desilter together with 6” rubber hose. The gas holes atop overflow pipe are used to prevent siphonage inside. Some small amount of drilling fluids will leak via them when desilter is working. However, the hole should not be blocked especially artificially, or the machine’s performance will be affected. 

    2. Desilter pipe manifold, whether they are inlet main line or outlet main line, are linked by flange at either end both to allow flow-in and -out of liquid. The joint of overflow main line can rotate at any angle in order to install 8” rubber hose into another compartment of mud tank. Inlet pipe and overflow pipe should form 90° angle when they are installed. 

    3. Screen box fixation devices should be turned on before starting desilter. 

    4. Desander can be adjusted via the adjustment of Centrifugal Pump outlet pressure.

    5. Screens

      Screen lifespan and efficiency will be greatly affected by how well screens are assembled. Try to prevent screen from being artificially damaged. Straighten the screen, or screens will be rapidly worn due to “friction” between screens and supporting strips when shale shaker is working; but they cannot be too tightened, or they will be rapidly damaged or directly torn under over great prestress.When crooked or damaged, supporting strips should be straightened and replaced. 

    6. Slip locking mechanism

       It is aimed at locking screens and tightening winding shaft. Winding shaft can be locked by tightening slip with screw. In order to prevent the mechanism from rusting away, it is better to lubricate it with butter every time when screens are replaced. 

    7. Maintenance of Screens:

      It is forbidden to scratch or slap them with shovel or other iron tools and hard shovel. Apply screens with different mesh based on drilling fluids performances. It is best to use screens with thinner mesh for better efficiency when it is ensured that drilling fluids will run away. 

    Maintenance and Keep-up

    Maintenance regulations must be implemented on screen maintenance, reparation and cleanup. Failed or damaged components should be adjusted, screwed, lubricated, cleaned, replaced when accumulative working time is above 500 hours. When above 4000 hours. Tightening shaft of screen box should be examined and replaced, taper cylinders and spiral case changed and electric motor insulation property examined.

     

  • Assembly and Adjustment Method of LCS250 Desander—Xi’an KOSUN Machinery Manufacturing Co,. Ltd.

     Detailed Introduction of Desander

    Features and Advantages:　

    KOSUN Desander is the second-phase solids control equipment in drilling fluids treatment. It can be used to solid particles between 45 and 74 in diameter.　　

    Desander cones are made from 100% polyurethane and high-chromium iron. It has a lone lifespan. 

    Its clamp-on design makes it easy to maintain.　 

    It is compact and takes up small footprint.　 

    It is flexible to choose 1, 2 or 3 10” or 12” cones based on capacities. 

    It is quick to be assembled and installed for users.

         1.Centrifugal Pump outlet and Desander inlet are connected by 6” pipe. 

         2.Desander pipe manifold, whether they are inlet main line or outlet main line, are linked by flange at either end both to allow flow-in and -out of liquid. The joint of overflow main line can rotate at any angle in order to install 8” rubber hose into another compartment of mud tank. Inlet pipe and overflow pipe should form 90° angle when they are installed. 

    3.Screen box fixation devices should be turned on before 

        4.Desander can be adjusted via the adjustment of Centrifugal Pump outlet pressure. 

    Assembly of Screens 

        1. Screens

    Screen lifespan and efficiency will be greatly affected by how well screens are assembled. Try to prevent screen from being artificially damaged. Straighten the screen, or screens will be rapidly worn due to “friction” between screens and supporting strips when shale shaker is working; but they cannot be too tightened, or they will be rapidly damaged or directly torn under over great prestress.When crooked or damaged, supporting strips should be straightened and replaced. 

        2. Slip locking mechanism 

    It is aimed at locking screens and tightening winding shaft. Winding shaft can be locked by tightening slip with screw. In order to prevent the mechanism from rusting away, it is better to lubricate it with butter every time when screens are replaced. 

    3. Maintenance of Screens:It is forbidden to scratch or slap them with shovel or other iron tools and hard shovel. Apply screens with different mesh based on drilling fluids performances. It is best to use screens with thinner mesh for better efficiency when it is ensured that drilling fluids will run away. 

    Maintenance regulations must be implemented on screen maintenance, reparation and cleanup. Failed or damaged components should be adjusted, screwed, lubricated, cleaned, replaced when accumulative working time is above 500 hours. When above 4000 hours. Tightening shaft of screen box should be examined and replaced, taper cylinders and spiral case changed and electric motor insulation property examined.

     

  • Solutions for the common problems of KOSUN JQB6545 Shearing Pump

     Detailed Introduction of KOSUN Shearing Pump

     

    JQB Shearing Pump is capable of quick concoction of high-performance drilling fluids, leading to reduction of time spent on drilling fluids concoction and increase of drilling economic benefits. It can enhance the bentonite hydration extent. It can save over 30% of bentonite and dilute, shear and hydrate polymer. You are welcome to consult and purchase the drilling fluids shearing pump, drilling mud shearing pump, oil equipment specialized shearing pump.

    Functions:

    JQB Shearing Pump is capable of quick concoction of high-performance drilling fluids, leading to reduction of time spent on drilling fluids concoction and increase of drilling economic benefits. Features and advantages:　　

        1. It can enhance the bentonite hydration extent. 　

        2. It can save over 30% of bentonite and dilute, shear and hydrate polymer. 　

        3. It can provide higher lift and flow to meet the needs of drilling fluids concoction and treatment.  

      Problems

             Causes

              Solutions

    Too much shaft power

    1.Friction between blades and pump shell/blades and bush/sub-blades

    2.Pump is working with a lift lower than designed

    3.Stuffing gland taps too tightly.

    4.Belts slide.

    1.To remove friction by adjusting the gap between propeller and pump shell/propeller and bush/sub-propellers

    2.Make sure pump is working with designed lift by examining if motor is standard and turning down relief valve.

    3.Adjust stuffing gland

    4.Tension belts(see if the two belts are installed right in place).

    Reduced lift and flow

    1.Suction pipe and propeller flow passage are blocked by large particles

    2.Pump rotary speed reduces

    3.Propeller is worn

    4.Leakage is increased by too much gap between propeller and pump shell end

    5.Inlet valve is opened large enough

    1.Remove the blocking particles

    2.Make sure pump is working with designed rotary speed.

    3.Replace the propeller

    4Adjust the gap between propeller and pump shell end

    5.Open the inlet valve large enough

    Overheat bearings

    1.Lubricating oil is put too much or too little

    2.There are impurities in lubricating oil

    3.Bearings are worn

    1.Keep oil surface at the regulated level on dipstick

    2.Change lubricating oil

    3.Replace bearings

    Working  pump generates vibration and unusual noise

    1.Propeller is worn unevenly

    2.Bearings are worn

    3.Connection loosens

    4.Cavitation in pump

    1.Replace propeller

    2.Replace bearings

    3.Tighten loose components

    4.Prevent air from pump by improvement on pumping condition

    Severe shutdown sealing and leakage

    1.Polyurethane oil seal is over worn

    2.Axle sleeve is seriously torn

    3.Stuffing seal is over worn

    4.Packing ring inclines

    5.There are impurities and foreign matters in packing ring

    6.Packing ring bevel is consistent.

    1.Replace polyurethane oil seal

    2.Replace axle sleeve

    3.Change with new packing ring

    4.Reassemble the packing ring

    5.Remove impurities and foreign matters and clean packing ring

    6.Dislocate and reassemble packing ring based on requirements.

  • Contents and Specifications on A Kind of Drilling Fluids Centrifuge

     Drilling fluids centrifuge: KOSUN LW series decanter centrifuge is especially used for separation and filtration of suspension containing solids above or equal to 2μm and of solid concentration between 2 and 40 percent and liquid viscosity below or equal to 0.03 Pa•s, separation of liquids containing small amount of solids; and for separation of amorphous materials that is make teh regeneration of filter cloth hard and suspension that has a greater range of solids concentration. It is applied in such solid-liquid separation fields as oil industry, chemical industry, medicine industry, environmental protection industry, industrial sewage treatment, etc for the purposes of solids dewatering, liquid purification, size classification and so on.  

    1.Methods and Tips of Storage

    The storage environment of drilling centrifuge requires the comparatively humid space do not account for 90% of all, the normal storage temperature range from -25° to 55°, good ventilation and no corrosive gases and no electric leakage. The internal components of electric control tank need further adjustment to prevent potentials of wetting loss and power leakage should the drilling centrifuge be stored for a longer period, 

    2.Application Environment of Drilling Centrifuge

    Storage temperature: -20°—50°

    Humidity: not above 95% with good ventilation to keep it dry

    Electric defense grade: IP54

    3.Components of Drilling Fluids Centrifuge

    KOSUN LW Decanter Centrifuge is driven by two electric motors of which the master one drives rotary drum and differential cover via belt and the auxiliary one drives spiral propeller after its speed being made different. In this way, the rotary drum and propeller both rotate in the same direction with certain speed difference. The working diameter of drum is either 450 mm or 600 mm. Decanter Centrifuge mainly comprises rotary drum, spiral propeller, differential gear, differential cover, motor base and so on.

    1: Rotary system is mainly consisted of explosion-proof electric motor, hydraulic coupling, differential gear, etc. 

    2: Over-current protection system is primarily used to offer the equipment overload protection when the current is over powerful.

    3: The equipment primarily contains such vital components as feeder, classifier, machine base, speed reducer, elevated nacelle and so on.

    4: Feeder pipelines assembly includes feeding pipelines and clean water pipelines, 

    5: Electric controlling system is consisted of electric control tank, limit switch and power cables.

    You are very welcome to visit KOSUN official website: please refer to www.xianKOSUN.com for more. Xi’an KOSUN Machinery Manufacturing Co,. Ltd, the pioneer in the field of solids control in China as well as an integrated service supplier of global drilling fluid solids control and waste treatment, is able to its customers with 25 products which fall into four categories,including oil&gas drilling solids control equipment, centrifugal products, drilling waste treatment equipment and drilling safety equipment.

       

     

  • Instructions for the Key Component on Mud Agitator–Speed Reducer

      Instructions for the Key Component on Mud Agitator–Speed Reducer

    First off, it is necessary to make a brief introduction of agitator’s working principles: KOSUN WNJ series mud agitator is the equipment mainly used in tank-shaped solids control system to mix and agitate drilling mud. It can prevent solids from depositing in circulating system and keep drilling mud stable and well blended. You are very welcome to inquire about and purchase the mud agitator, oil drilling agitator, drilling mud agitator.

    This time, we will continue to talk about maintenance and notes of speed reducer on mud agitator.s 　

    They primarily fall into four points:

    1.Speed reducer should be installed firmly on a stable and horizontal foundation or base in order to pump the oil out from oil scupper and to ventilate cold air. Unstable foundation will lead to shaking and noise as well as unnecessary wear of bearing and wheel gear. It is better to install protective gear when something sticks out from drive connector or when it adopts gear drive or sprocket drive. And the protective device should be cemented if output shaft bears larger radial load.

    2.The devices installed as the specification requires allows workers to approach oil scale, breather plug and oil venting plug. After the installation, you should thoroughly check one by one if they are put in the right place, if the fastening pieces press stably, and if the device can rotate flexibly. Speed reducer is lubricated by spilled oil from oil sump. Before operation, you need to unscrew the air vent and place a breather plug instead, then unscrew the oil level line plug to check the height of oil level line. Afterwards, pour lubricating oil in till the it spills out and screw the plug again for a trial running without load for at least a couple of hours. It should be operating stably without impact, shaking, noise or oil spill, otherwise it need reparation at once. Some time later, the oil level line should be checked again to eliminate the possibility of oil spill from casing. The brand of lubricating oil can be changed under over-high or -low temperature. 

    3.Drive axis should be centered with deviation not above the offset rate of coupling during the installation of speed reducer. Well-centered drive will extend service life and achieve ideal drive efficiency.　

    4.Do not hammer the drive on output shaft but install it with assembling fixture and female thread at the end of shaft. Screw the drive into shaft to prevent damage on the internal parts of speed reducer. Steel fixed coupling is better avoided since it will generate unnecessary excess load, premature damage on bearing and even fracture of output shaft.         

    Then, we will come to the illustration for its general technology. Its features and advantages primarily contain: 1. helical-bevel gearbox, 2. outdoor explosion-proof electric motor, 3. capability of 20ppg drilling mud, 4. available power between 2.2 and 25KW, 5. compact design, less noise, stable operation and ease of maintenance. 

     

  • China Development Leads Firms Abroad

    On October 15th, the 114th Canton Fair which is also known as China Import and Export Fair was opened in China Import and Export Fair Complex located in Guangzhou, Guangdong, China. Having attracted 24,517 enterprises worldwide, it has set up a total of 59,539 stands for this autumn session, eight more than the spring session.

    These years have witnessed increasingly rapid economic development in China and much cemented relationship with its neighboring countries as well as the top economies. Many companies flocked into this over 960-square-kilometer land for more economic potentials while more and more domestic firms eyed overseas for a larger market.

    Xi’an KOSUN Machinery Co., Ltd., also called KOSUN for short, is a drilling solids control company established at the early phase of reform and opening-up. In 1992, Mr Geng Zhouhou, encouraged by Deng Xiaoping’s speech made during his inspection tour in South China, founded KOSUN which grew out of Xi’an Changqing Drilling Equipment Factory and Xi’an KOSUN Oil Drilling Equipment Co., Ltd.

     

    Field picture of KOSUN Jingwei Solids Control Equipment Factory
    Field picture of KOSUN Jingwei Solids Control Equipment Factory
     

    Mr Geng Zhonghou and his successor Mr Geng Feng had consecutively committed themselves to forming a strategic business, management and promotion pattern. After 21-year effort, KOSUN is now the pioneer in the field of solids control in China as well as an integrated service supplier of global drilling fluids solids control and waste treatment.

    Recently, the company board made a significant decision of forming a specialized project group for business expansion in EEA and American market when they saw more and more possibilities brought by the success with API application and CE-marking application. Both the International Commerce Department and Electronic Business Department are deployed into the project group which is about to march into the international markets in the midst of this October.

     

    Mr Geng Feng(left),KOSUN General Manager is shaking hands with SCOMI president(right)
    Mr Geng Feng(left), KOSUN General Manager is shaking hands with SCOMI president ( right )
     

    This year, the successive convening of G20 summit, APEC and ASEAN multilateral talks greatly associated all the countries together in terms of economic development. It is believed that bilateral and multilateral ties enhanced thereof will definitely bring more opportunities to companies worldwide as well as global economic prosperity.

     

  • China Begins to Seriously Fight Pollution

    Chinese people have witnessed a dozen of smoggy days after stepping into a new year. Chinese government finally began to take serious measures to fight against the “pollution monster”.

    In the recent years, China has been claiming more recognition and reputation as an emerging economy, whose wing-footed development truly stunned its neighbors and some century-old world dominants. However, its speed is too fast to allow itself a stop to  sometimes have a look at how the landscape has transformed alongside.

    From who-knows-what time, the air we inhale and exhale has started to contain more elements which we call dust or sand in its molecular structure. People has felt it more and more difficult to breath with such. Besides, the rivers turned foul and filthy too without much possibility to see to its bottom as before, leading to an everyday occurrence of horrible sight of dead fish bodies floating along with the dirty foams on the river surface. What is more, the installed tags in gated communities no longer produce any crystal-clean water but some yellowish mixture of liquid and sand.

    Discovery of “Cancer Villages” even deepened people’s fear.

    Therefore, Chinese government decided to set up a network to monitor air pollution nationwide in 17 provinces. Some experts even had suspicions that kitchen cooking should also be blamed for the emission of PM2.5 into air and called for Beijing citizens to improve on that.

    In September, Beijing unveiled a five-year air pollution control plan in which the city decided to fine any violator of the rule above 1 million yuan.

    The industrial factories and some oil companies are also doing their bits. Take a solids control manufacturing company in Xi’an as an example. Xi’an KOSUN Machinery Co., Ltd. was established by Mr. Geng Zhonghou after Premier Deng Xiaoping made the speech in his South China tour. It has launched a new set of environmental solutions by integration of experience accumulated in oil industry, several phases of grueling development and consistent research in advanced technologies.

    This solution is able to reduce the waste at its source by using solids control equipment to purify mud and separate solids at the source; dewatering the discharged waste to minimize its water content, conduct water treatment and recycling; utilizing Hi-G shale shaker and vertical cuttings dryer for further dewatering and solid-liquid separation to minimize the waste discharge; and applying solidification, biodegradation, thermal desorption and cuttings reinjection to the discharged waste for a reasonable and effective treatment on the drilling waste.

     

  • 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.

    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.

    However, the practicality of biodegradation must be taken in to 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 got good achievements.

     

    Key words:

    KOSUN: Established in 1992 and headquartered in Xi’an, China, Xi’an KOSUN Machinery Manufacturing 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 there 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.

     

  • 按时

    KOSUN was founded by Mr. Geng Zhonghou in Xi’an China in 1992, it was the earliest oil and gas drilling solids control equipment manufacturer in China. Up to now, KOSUN has been a well-known centrifuge manufacturing enterprise, solids control industry leader and drilling waste management expert in China.
     

    KOSUN is always insisting on winning the market by product upgrading and technical innovations, keenly grasps the customers’ demands and enjoys a high reputation in the industry for its stable product quality, personalized product customized services and perfect global after-sales services.
     

    KOSUN is capable of providing customers with such three series as oil & gas drilling solids control equipment, centrifuges and drilling waste treatment equipment, including 25 categories of products, which are extensively used in oil & gas drilling and workover, coalbed methane drilling, shale gas drilling, water well, geothermal well drilling, trenchless horizontal directional crossing projects, mine gravel staged treatment, tailings treatment, rive dredging works, industrial wastewater treatment, environmentally friendly sewage treatment, waste oil recovery, purification treatment, etc.
     

    Nowadays, KOSUN possesses three factories: two factories in Xi’an China, one specializing in producing solids control equipment and centrifuges, the other manufacturing all kinds of drilling fluid tanks, water tanks, oil tanks and pressure containers, and the third factory producing various drilling fluid tanks, oil tanks, water tanks and camps in Aktobe Kazakhstan.
     

    The corporate vision of KOSUN is to integrate global resources, set foot in China market, provide all-around and one-stop oil drilling fluid solids control products and waste treatment products, solutions as well as services with responsible and sustainably innovative spirit, maximize the values of staff, customers and shareholders, and take the satisfaction of customer as the eternal pursuit.
     

    KOSUN is approved by CE.

    CE

     

    KOSUN gets membership of IADC for 5 consecutive years.

        2013 IADC2012 IADC   
     2011 IADC2010 IADC   
     2009 IADC

     

    KOSUN passes assessment by API.

    2013 ISO    

     

    2013 TS    2013 COR

    KOSUN has been approved by ISO Qaulity Management Certification System since 1997


    KOSUN Got Trade Mark Registration Certificates

     

    KOSUN gets consecutive award of various national potents by its strong technological design and innovative capability
     

    KOSUN Got Quality Management System Certificates
     
     

    KOSUN got Explosion-proof Electrical Appliance Production License

     

     

    KOSUN was awarded High-tech Enterprise Certificate

     

  • Realization of "GREEN" Dream?

    On August 29th, CNN published a coverage about the famous Car City—Houston, Texas, US, which read, “Houston may be a city built on the profits of oil and gas, but it has a green dream.”

    The dream is to create a city that is "more liveable, walkable and bikeable," according Laura Spanjian, the director of sustainability for Houston since 2010, when current Mayor Annise Parker was elected.

    For many years, Houston has been known as a hub producing large quantities of oil and gas. However, intensive drilling activities brought not only huge financial benefits, but also worrying environmental problems.

    As far as we all know, petroleum products help us do many things. We use them to fuel our airplanes, cars, and trucks, to heat our homes, and to make products like medicines and plastics. Though the life is made much easier, finding, producing, moving and using them can cause problems for our environment like air and water pollution. Many types of wastes are also generated by activities like drilling, production and accidental releases. All of these hazard human health and wildlife.

    Therefore, laws and regulations have been enforced by governments to help reduce the hazards and new technologies developed to help improve.

    Xi’ an KOSUN Machinery Co., Ltd. ( KOSUN ), as the pioneer in the field of solids control in China as well as an integrated service supplier of global drilling fluid solids control and waste treatment, has always diverted energy and investment into the research and development of latest environmental solutions fit for oil drilling and exploration.

     

    Field Pic of KOSUN solids control system
    Field Picture of KOSUN Solids Control System
     

    After countless experiments and grueling struggle, KOSUN has invented a series of waste management solutions and relative solids control equipment.

    Take one as an example. KOSUN Mud/Gas Separator is an especially ideal equipment to be used when accidental release, kick or blowout is encountered. It is primarily used to separate the free gas from the drilling fluids, which may include toxic gases such as hydrogen sulfide. In this way, not only the safety of drilling is ensured, but more possible air pollution is prevented as well.

    Besides, the series of waste management solutions launched by KOSUN is different from the conventional approaches in many ways. It was born by the integration of domestic and foreign waste management experience and methods as well as the consideration of drilling waste production process. The solution upholds the waste reduction at its source. It will purify the drilling fluids and take away the solids at the source by application of solids control system. Then dewatering of discharged waste, water treatment, water recycling and purifications will work altogether to minimize water content in waste and recycle the water. Afterwards, Hi-G Dryer and Vertical Centrifuge will continue with dewatering and solid-liquid separation to minimize waste disposal. At last, the discharged waste will be reasonably and effectively treated by means of solidification, biodegradation, thermal desorption and cuttings re-injection. Thus, the goal of zero disposal is achieved and the dream of “green cities” realized.