Decanter centrifuge use in solid separation for drilling fluid after desilter, which done by the 4 inch hydrocyclone  The drilling mud at this stage may contain solids between 2 to 5 micron and in some case, it contain the barite, the reusable additive.  Decanter centrifuge ‘s purpose is separate this fine solids and recover the barite to achieve purification of drilling mud so it can be sent it back to rig and use it for drilling many times over.

The basic concept of decanter centrifuge is use G-force rotate the bowl “spinning” to create the weight difference so the solids is separate from the mud.  During the high speed spinning in G-force, the solids move in one direction while the mud moves to opposite direction to achieve the separation and two exits below the decanter centrifuge will be one for exit of solid while the other one is for the mud that is done separation. The centrifuge generate centrifugal force amount to 400g~3000g acceleration, only need a short time accomplish the separation process

Such process is accomplish by feeding the drilling mud after the separation of desilter and feed the mud into the decanter centrifuge. Decanter centrifuge mainly use for recovering the barite and get rid of small solids in the mud for reduce the solids in the drilling mud.  This step to make sure the function of drilling mud back to near as new as possible, which the drilling rig bit need for continues drilling.

Drilling rig need this cleaning step is purposely maintains the cost of the drilling. The maintains of drilling cost is by product.  The main reason is if solids separation is not done properly, the density of small solids will raise and that will seriously affect the drilling bit which will cost raise temperature in the mud and cost damage of the drilling bit and many other types of machinery to over worked and lead to structure damage of the drill rig.

Many facilities are working on processing the contaminated water to make water and the removed solids reusable and safe for disposal. When talking about the contaminated water, the polluted river and lake water as well as the industrial water are always concerned. How to find a good solution to processing the water with a significantly lower cost and high efficiency is the most critical issue that the operator thinking about.

Here the dewatering system would be an ideal choice for this process. This rapid dewatering system is including several modules which separately functions various processing job. The theory of the process is to remove as find solids from the contaminated water as possible, which will need several kinds of separation equipment.

For the first part to remove the coarse debris and sand, the solids control equipment would be an excellent solution. It may require a coarse screen shaker which is used to remove, dry and stockpile bulky debris from the dredge slurry, such as rocks, shells, cans and vegetation. The underflow going through the screen would be pumped to the de-sanding unit for further treatment. The de-sanding unit uses the hydrocyclones to separate the sand by size and weight. Under the cyclones, the linear motion shale shaker is calibrated to handle the coarse sand at any amount and type. The dried and stockpiles sand would be reused and transported. GN Solids Control is a reliable supplier for the coarse shaker and de-sanding unit.

For the ultra fine solids still contented in the dredge slurry, it has to be flocculated by using the correct dose of polymer. Here need a feed tank to keep a reserve of slurry that is continuously mixed by agitators. The slurry would be pumped to the polymer system.

After flocculation, the slurry would be transferred to a screen system to remove the ultra fine solids including the clays, silts and organics. This screen system adapts the fine screen which is always 200 mesh. Genesis Water AquaScreen is a patented solution for instantly dewater flocculated sediments removing which could remove the solid material as small as 0.0007 microns. Lots of contaminants are bound in the resulting flocculated mass and isolated from the return water. The screen system gravity feeds the flocculated material into another patented device which could secondarily realize the isolation and leave the stackable, truckable solids and clear discharged water.

The rapid dewatering system could accomplish the high speed dewatering, scalable and environmentally sustainable job for dredging slurry dewatering processing.

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EMEC, which is short for Egyptian Mud & Chemical Engineering Company, is a well known company with more than 25 years history for providing specialized drilling and production solutions, and has a certain influence on oil and gas companies in Middle East and African companies.

GN Solids Control, as the second to none Oil and Gas solids control and waste management system and equipment company in China, has been working with EMEC for years. The both parties know each other very well. By end of last year, EMEC has launched a big order to GN Solids Control, for a large batch of decanter centrifuges. This celebration, is not only for the partnership between EMEC and GN Solids Control, but also the celebration for delivery of some of decanter centrifuges.

The owner of GN, Mr Zhou and the Exclusive Manager Mr Amir from EMEC attended the celebration, and also the head quarters of GN, and engineers from EMEC. During the celebration, Mr Amir and Mr Zhou respectively gave their sincere speeches about the future of cooperation. Both parties surely believe that, GN will bring to market more and more high quality equipments and products, and the cooperation relationship between the two companies will be brighter. Mr Amir also appreciated the efforts from GN staff for successfully producing so many high quality decanter centrifuges.

That is exactly fact. His order came just before the Chinese New Year, in order to deliver the order in time, GN staff, especially the producing department, sacrificed their holiday and adding working hours in shifts. It is every GN person’s belief that the customers’ need is the most important.

GN also appreciates EMEC’s support and trust for a private owned company. And we have reason to believe that, the future cooperation between the two esteemed companies will be brighter.

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As GN is manufacturing increasingly more mud tanks each year, more clients from abroad are requesting GN Solids Control Co. to provide his technical solutions for his customers. For any salesperson, to know how to calculate the effective of mud tanks by a fast way is essential. Clients are going to be astounded by an educated purchase.

So today we have prepared to share some methods to calculate the effective amount of GN tank.

The GN tank’s effective volume is dependent upon three factors: the first is the interior effective length, the second one is the interior width, and the third one is to be the height of corrugated board. Therefore the volume equals towards the product of those three factors.

If this involves container type tanks, the effective length is equivalent to the particular entire container. However, for any skid type tank, the effective length ought to be subtracted by 500mm because we have to go ahead and take skid parts into account.

If the centrifugal pump is installed on the skid, the effective length ought to be calculated in by doing this:

1. The centrifugal pump is installed flatly

while a pump is installed flatly, what this means is that it’s align using the length direction from the tank, so a pump with 37kw motor is visible as taking the size of 2.5m, and forces above 45kw ought to be subtracted by 2.8m for other pumps. Besides, if you find two paralleled pumps, the tank length ought to be subtracted by an additional 300mm.

2. The centrifugal pump is installed vertically

But when the pump is installed vertically towards the direction of tank’s length direction, 37kw motor is going to be calculated as 1m and 45kw motor (or over) is going to be treated as 1.3m.

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A hydrocyclone is device that removes large cutting from the whole mud cleaning system. The desander should be located next of the shale shakers and degassers, but before the desilters or mud cleaners. A volume of mud is pumped into the wide top section of the hydrocylone at an angle roughly tangent to its girth. As the fluid flows around and slowly down the inside of the cone shape, solids are separated from the liquid by cycleclone forces. The solids continue around and down until they exit the bottom of the hydrocyclone (with some with small amounts of liquid) and are dispose. The cleaner and light density liquid mud up go through a vortex in the center of the hydrocyclone, exits through piping at the top of the hydrocyclone and is then flow to the mud tanks and the next mud-cleaning device, usually a desilter. Different size desander and desilter cones are functionally same, with the size of the cone determining the size of debris the device removes from the mud system.

During the operation of the drilling, the body of hydrocyclone is desander and desilter.  The size of the bore for desander is 100 mm and more and use filter 44-74 micron and above of the sand.  The size of the bore for desilter is less than 100mm for filter the 15 micron above.  Desander is use mainly on second steps of drilling fluid purification.  Desilter is use mainly on third step of drilling fluid purification.

Hydrocyclone is use for purification of the drilling fluid to ensure the performance in purification.  As part of the purification of the fluid use other machinery like shale shaker with filter screen and decanter centrifuge operate with high centrifugal force, all comes together with result  the removal of solid in drilling fluid within 2 micron.

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Regarding to solids control system equipment, one may firstly realize shale shakers, desander and desilter, the decanter centrifuges and mud cleaner. But nobody could disregard the mud gun that is small equipment not small effect equipment.

GN Solids Control has much experience in designing and producing solids control system and equipment. Including the solids control system, I will introduce the essential function of the mud gun in the following paragraph.

What is the mud gun utilized for?

1, mud gun can be used to cooperate with the mud agitator to keep the drilling mud from settling. The mud agitator is installed in middle of the tank, and corresponding mud gun is near that, for caring concerning the tank corners.

2. for delivering drilling mud in one tank to the another. Obviously, the mud gun can’t accomplish this goal simply by itself, also it need assistance in the mud gun pipeline.

What does mud gun pipeline seem like?

A mud gun pipeline is really a 2 inch or 3 inch cubic pipe installed through the top frame of mud tanks. It covers nearly each tank from the system, aside from the shaker tank. Since the drilling mud in shaker tank isn’t active mud, which cannot be used directly in further drilling. However the drilling mud in other tanks, like active tank underneath the centrifuge, most occasions it may be employed for mud pumps. Or mud kept in storage tank.

Since the mud gun itself doesn’t have energy they are driving the mud, the mud gun line actually is associated with the blending pumps. Once the user have to transfer mud via mud gun pipeline, it always shut lower the bond between your mixing hopper and it is centrifugal pumps, then your pumps can be used to suck mud to mud gun line. By closing some tank’s mud gun lines, drilling mud is moved to destination tank via mud guns.

GN Solids Control is professional in solids control systems, if you have any problem about treating the drilling mud, GN will be the best choice.

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It’s more frequently learned about dewatering unit in drilling industry but the majority of the persons working in this industry are not so acquainted with the dewatering unit. In the following paragraphs, I will provide a simple introduction on which is dewatering unit and also the application.

Dewatering unit we are also able to name it as ultra fine solids removing system. It always includes the fine solids separation system and polymer mixing system.

What’s the composition from the dewatering unit?

1. Feeding System

GN’s dewatering system has 2 screw pumps utilized for moving the flocculation and also the slurry towards the decanter centrifuge. The harmful chemicals and also the slurry meet in the feeding pipe from the decanter centrifuge and the flocs also created here. Then your slurry with large size flocs will get in to the centrifuge together there for separation.

2. Automatic polymer mixing system.

GN dewatering unit automatic polymer mixing product is 2 tanks system. It’s outfitted with medical feeding system, water injection system, mixing system and delivery system, electrical control system and gauge system. This APM system has 2 screw conveyors, the first is accustomed to transfer the powder medications towards the hopper around the mixing tank, and yet another screw conveyor is situated underneath the hopper to provide the powder in to the pre-mixing tank.

3. GNLW553-VFD dewatering centrifuge for separation

GN dewatering unit choose GNLW553 various frequency drive model serve as the separation centrifuge. The control panel was created as four various frequency drive for that centrifuge primary motor, back motor and 2 feeding pumps for slurry and medicals. Following the separation from the centrifuge, the big size flocs could be removed out, then your ultra fine solids is separated out.

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The majority of the large capacity drilling project needs one set drilling liquids recycling system. As the drilling mud system is considered high configuration system and economic configuration model. Our prime configuration mud product is continually equipped for that oil drilling rig. This kind mud system consists all of the solids control equipment like shale shaker, desander, desilter, decanter centrifuge and vacuum degasser. For many deep oil wells drilling, the mud system is composed of numerous mud tanks for active mud storage. The economical configuration mud product is always employed for an oil well drilling, workover rig project, piling project and horizontal directional drilling project.

Workover rig mud product is little simpler within the solids control equipment configuration because the mud system sometimes only retain the shale shaker for just one stage solids control. The workover rig there is no need the drilling mud to become treated very clean. Additionally, it includes a mud mixing system that can be utilized to re-compose the drilling mud.

Based on the flow rate from the directional drilling rig, the HDD mud product is frequently split into different model. For example GN’s model 150GPM, 350GPM, 500GPM, 800GPM, 1000GPM and 1500GPM. The HDD contractor would always not utilize the decanter centrifuge in the system because the drilling fluid’s request is not such high around the cleanness. However, many clients has high request, they’ll also place the decanter centrifuge in the mud system.

The piling product is the easiest desanding unit there are just one tank and one set high capacity desander. GN solids control can supply the piling system of D50 and D100 according to the treating capacity. Always the piling product is no mud mixing system, the solids are taken away by the vibration screen, and also the liquids get lower towards the tank and also the pumped to the rig.

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GN unique the auger V shape tank is perfect for collecting a lot of drilling cutting and rapidly delivery the cutting towards the both cutting drying equipment along with other application.GN V-shape tank removes the risk of an environment spill on the working site. V-tank auger stable convey all of the solids

Features & benefits

1. Process rates are 20~60 tons each hour (Ton/Hour) with explosion standard motor

2. Reduce the equipment footprint and customized can be obtained

3. Auger is used with abrasive material for extended operation minimizing maintenance

4. Save the money and reduce the track hoe and back hoe usage. Maximum reduce the project expenditure

5. Buffer bar is mounted between tank and auger. It effectively cuts down on the harm to gravity of solids for that screw conveyor. Additionally, it assure the auger correctly condition

6. The V tank is like standard frac tank, lowering the rig-up time and easy operation.

Cooperation with GN Vertical Cutting Dryer

GN vertical cutting dryer plays an essential role in recovery of drilling cuttings, GN V-shape tank is capable of doing collecting the drying cutting from shale shaker and subsequently transfer cutting to vertical cutting dryer for more process. Capacity of GN vertical cutting dryer is 30~50 Ton each hour. V tank auger will fit the demand.

What’s Vertical Cutting Dryer?

GN vertical cutting dryer can be used for drying oil based mud, water based mud and artificial based mud. While using centrifugal pressure and stainless screen maximum separate the solids and recovery the drilling liquids. You will find three types of screen to split up different solids including 0.25, 0.35 and 0.5mm opening size.

GN is focusing on the solids control and drilling waste management industry for several years. We’re devoted to supplying the Zero discharge solution, small footprint and economic the perception of any project. Make a connection with GN representative either recovery of drilling cutting problems or drilling cutting delivery issues.

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GN’s engineer just finished the commissioning in West Africa for 4 models GNLW363 centrifuge. Aside from the centrifuge, this customer also purchased the screw feeding pump and screw conveyor from GN Solids Control.

All the majority of the nation’s inside the territory of West Africa or close to the Gulf of Guinea has wealthy oil reserves. It’s proven the oil reserves at gulf of Guinea store more than 80 billion BBL, which makes up about 10% from the world’s total reserves. In past many years, a sizable percent from the world’s oil production increase goes to Africa.

GN solids control has built connection with many oil industry clients from the West Africa nations. A few of the clients already placed to GN even repeated orders.

Programs of GN Decanter Centrifuge

GN’s decanter centrifuge can be utilized for various programs, from primary solids control system barite recovery to ultra-fine solids separation to drilling waste cuttings management, then to dewatering unit system. Barite recover always require a centrifuge with Revolutions per minute 1600 to 2000, GN includes a type of GNLW452 is particularly for solids control barite recovery. A few of the drilling companies would also equip one unit high-speed centrifuge following the GNLW452 for ultra-fine solids control separation.

GN can supply centrifuge with fixed speed control panel and VFD control panel. Much like this West Africa customer, they bought GNLW363G-VFD for their waste cuttings management. GN’s VFD control panel for centrifuge might be designed as 3 various wavelengths for primary and back drive on centrifuge, and also the third VFD is perfect for the feeding pump. Using the VFD control panel, GN’s biggest type of centrifuge GNLW553 would be utilized for dewatering centrifuge for waster base drilling liquids colloidal size contaminants separation. By utilizing VFD panel, the consumer could adjust the feeding rate and Revolutions per minute based on specified slurry material and dealing conditions. Evaluating using the fixed speed model, the VFD model includes a more wide application.

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