Desander Desilter

Right now we have one set of oil based drilling waste treatment system in stock in China, which is brand new and produced in 2021.10. If you need one set of drilling waste treatment system and prefer stock items, pls contact with GN solids control. The system including one unit of vertical cuttings dryer, one unit of VFD decanter centrifuge, one set of vertical cuttings dryer flushing pump, one set of decanter centrifuge feeding pump, one set of fluids collection tank and all the equipments will be installed on the tank skid for convenient transportation. The whole system with explosion proof electric control system and control panel.

To control the drilling waste, there are “4R” to be pay attention to, such as Reduce, Reuse, Recycle, Recover. Obviously, Ruduce is to reduce the drilling waste by using better performance solids control equipments, such as shale shaker, desander, desilter ( mud cleaner), the better of the solids control equipments working, the less drilling waste will be generated, so the further treatment, disposal cost will be reduced a lot.
Reuse is to reuse the drilling fluids which are treated by solids control equipments, which will reduce the generated waste and reduce the treatment cost.

Recycle is to use the drilling waste treatment system (oil based) to recycle more useful oil based drilling fluids, and prepare for new drilling fluids. The vertical cuttings dryer can reduce the oil content on the cuttings below to 5% if the drilling cuttings is fresh and come from primary shale shaker. The fluids will flow to fluids catching tank and the decanter centrifuge feeding pump will feed the fluids to decanter centrifuge to separate the fine solids from drilling fluids, the discharged drilling fluids from decanter centrifuge can be recycled and reused to prepare for new drilling fluids.
Recover is the last step, to get the recovered hydrocarbon, it is not suitable to reuse the drilling fluids, it can be collected as fuel oil.

As a mud cleaner manufacturer in China, GN solids control can produce different capacity mud cleaner, desander, desilter with single deck bottom shaker or double deck bottom shaker or without bottom shaker.
Firstly we need to know what is a mud cleaner? A mud cleaner is a combination of hydrocyclones and bottom shale shaker.

The mud cleaner hydrocyclones are made of 100% polyurethane for better abrasion resistance. A hydrocyclone should be feed by a centrifugal pump, without the feeding pump, it self can not work properly. We know that for oil and gas drilling industry solids control system , the mud cleaner normally use 4 inch desilter cone and 10 inch /12 inch desander cone, the desander separation cut point is 45~75 microns, the desilter separation cut point is 15~40 microns. The hydrocyclones working principal is as below:
The centrifugal force generated by the centrifugal pump in the hydrocyclones cause the solids in the drilling mud to be separated from the fluids. As gravity increases, the centrifugal force in the cone accelerates the solids settling.  Hydrocyclones can increase gravity 200 times. The solids are discharged from the lower apex of the cone, and the clean drilling fluid is discharged from the overflow and flows into the corresponding compartment through the fluids discharge pipe of the mud cleaner. The next centrifugal pump will transfer the mud from this compartment to the next l processing.

A hydrocyclone including upper cone, bottom cone, clamps, drop in apex, nozzle, some cones also with elbows. The apex opening size could be optional as per drilling fluids conditions in case of blocking in the hydrocyclones. The solids and fluids mixture rotates very fast and spiral down toward the drop in apex of the hydrocyclones.
If you need a solids control mud cleaner, pls contact with GN solids control.

As a vertical cuttings dryer and decanter centrifuge manufacturer in China, GN solids control also provided lots of vertical cuttings dryer and decanter centrifuges to our international clients this year, most of them are repeat orders from ordered clients in the past years, our clients including mud service company, oilfield service company, drilling company, oil company and waste management company. Based on different requirement, delivery time urgency, manufacturing development in client’s countries, they may select to buy the telescopic skid or collection tank skid from GN solids or made locally by themselves. Also for the VFD control panel, if strongly required by the client, we can accept to make it locally.

Vertical cuttings dryer and decanter centrifuge is the core equipment for the drilling waste management system to treat oil based drilling cuttings from primary shale shaker. We also provide screw conveyor to pick up the drilling waste from primary shale shaker of solids control system, and transfer the drilling waste from solids control system to vertical cuttings dryer feed port. We suggest not to stock the drilling waste for long time then to treat the drilling cuttings by vertical cuttings dryer, it will be more difficult to treat it well and get client’s required oil content result, compared with the fresh drilling cuttings, the long storage drilling cuttings is more sticky and with higher viscosity, more moisture during the contact with rain water.

The vertical cuttings dryer main components including feeding hopper, main motor, screen basket, control panel, lubrication system, rotor with flights, bell jar, solids discharge port, liquid discharge port, power unit, gearbox, we recommend the user to prepare for a flushing pump which need to be used frequently according to the drilling waste condition.
If you need vertical cuttings dryer and decanter centrifuge, pls contact with GN solids control.

This week one batch of centrifugal pump and mud agitators are ready for shipment for client’s liquid mud plant project. This is the repeat order from the same client, they always use our centrifugal pump and mud agitators for their liquid mud plant. Based on the mud storage capacity and mud tank quantities, the required centrifugal pump and mud agitators will be different.

GN centrifugal pump all spare parts are 100% interchangeable with most international brand pump, which can be used to replace the spare parts for the old pump. The pump casing and wide open vane impeller are all make of hard ductile iron alloy, which is better abrasion resistance material and with longer working life. The pump casing and impeller are one of the most wearable parts for the pump, to use the proper material to build these parts is very important. All the bearings are from world famous brand bearing, such as FAG for reliable operation. The centrifugal pump skid is made by casting for less vibration and reliable operation, so that the centrifugal pump working life can be extended. The traditional welding centrifugal pump skid cost less, but GN solids control will always provide the best performance manufacturing equipments.
The mud agitator with bevel helical type gear box, different with the previous worm wheel type gearbox , the bevel helical gearbox with the advantages as below:
1.    Compact design, with less space requirement
2.    Higher efficiency up to 95%

3.    With the same electric motor, the helical type gearbox mud agitator with higher efficiency for agitating the mud, especially for the mud with higher density by weight, it won’t became too hot to stop working or overloading, the agitating performance is better.
If you need centrifugal pump and mud agitator for your liquid mud plant, pls contact with GN solids control.

As a manufacturer of decanter centrifuge and oil sludge treatment system, GN solids control can also produce three phase decanter centrifuge and three phase disc centrifuge, which can be used for oil sludge separation unit.
3 phase decanter centrifuge is a solids liquid liquid separation machine, in the complete oil sludge treatment process, one unit of 3 phase decanter centrifuge can replace the design of decanter centrifuge + 3 phase disc centrifuge. Both of the design can separate solids, water and oil, to get the dry solids for disposal or landfill, pure water can be sent to waste water treatment facility and recovered oil can be sold.

How to select the design with 3 phase decanter centrifuge or 3 phase disc centrifuge?
1)    When the user required treatment result is not high, they can accept more oil in the solids. The recovered oil is not so clean and more oil in the water, they can select the 3 phase decanter centrifuge. But if the recovered oil required with BS&W below 2% ~3%, then they should use 1 unit of decanter centrifuge plus 1 unit of 3 phase disc centrifuge. The benefit of 3 phase decanter centrifuge is that the easy maintenance and operation compared with disc centrifuge.
2)    When the budget is limit, one unit of 3 phase decanter centrifuge is with competitive price than one unit of decanter centrifuge and one unit of 3 phase disc centrifuge.

3)    Less power consumption, for 5m3/h oil sludge treatment system, the power consumption of 3 phase decanter centrifuge is 27.5KW, the power consumption of one unit of decanter centrifuge and one unit of 3 phase disc centrifuge is 66.5KW.
Both of the 3 phase decanter centrifuge and 3 phase disc centrifuge need to work with proper chemicals to archive better separation result.

As a manufacturer of solids control system and drilling waste management system manufacturer in China, GN solids control can also design and produce liquid mud plant, recently one set of 35000bbl liquid mud plant are shipping to port for our client– drilling fluids service company.

The technical configuration is as below:
Part 1: mud mixing system: 2 units of mud mixing tank with dust free hopper and mixing pump, mud agitator, mud gun, transfer pump, pipelines, electric control system, handrails, walkway.

Part 2: mud processing system, including 1 unit of GNZS594F linear motion shale shaker, 1 unit of GNLW452D middle speed decanter centrifuge, 1 unit of GNLW363C high speed decanter centrifuge, with decanter centrifuge feeding pump, mud agitator, mud gun, transfer pump with soft starter, pipelines, electric control system, handrails, walkway. The decanter centrifuge is made of anti-corrosion and wear-resistant material, the centrifuge bowl is made of duplex stainless steel 2205, the screw is made of stainless steel 316L, the screw is protected by tungsten carbide tiles, the solids distribution port and fluids distribution port is protected by tungsten carbide alloy. The bearing is SKF brand bearing for longer working life.

Part 3: storage system: including 70 units of 500bbl (80m3) vertical storage tank, total capacity is 35000bbl, with transfer pump and soft starter, pipelines, guardrails, walkway, stairs. The user will connect the pipelines with their existing pipeline from dock
Part 4: Dry Bulk Silos: for dry powder storage, such as Bulk Barite/Cement pressurized silos
Part 5: air supply system, including air compressor and its accessories.
Part 6: if required the system can be connected with drilling waste treatment system, such as vertical cuttings dryer, dewatering centrifuge, high G drying shaker, screw conveyor, etc.
We can design customized liquid mud plant as per client’s requirement, pls contact with GN solids control for more information.

Below is the photo of one set of drilling cuttings treatment system working at rig site for international oilfield service company, the customer is satisfied with the treatment result. It is used to treat the oil based drilling cuttings from primary shaker, we suggest the user to collect the drilling cuttings from desander, desilter and decanter centrifuge separately and send to oil sludge separation system in the factory to get pure water, recovered oil and solids for disposal. If not meet the disposal standard, it can be sent to Thermal desorption unit for further treatment.

The pre-condition to use the vertical cuttings dryer including that the drilling cuttings should be oil based drilling waste, and only from primary shaker; the drilling cuttings should not be accumulated for too long, the long it is collected, the hard to separate the oil from solids, which will influence the treatment result. The drilling cuttings should not be polluted by rain water and other water, which will increase the water content, the discharged solids will with more moisture.

The high G drying shaker with the function to reduce the solids content, to get the better treatment result, we suggest client to use big screen opening of the screen basket, but by this way, some of the fine solids will be remained in the fluids, if the solids content is too high, the decanter centrifuge will be blocked and it is wear very fast, so we add a high G drying shaker  between them, no need extra feeding pump, just through flow by gravity, it will increase the separation efficiency of the whole drilling cuttings treatment system.
The decanter centrifuge is the last step treatment to separate the fine solids from the mud, the fluids can be reused to prepare for new drilling fluids and reused by the drilling rig.

Recently one batch of linear motion shale shaker, mud cleaner, decanter centrifuge are ready for shipment to oilfield service company. They are used to treat the used drilling fluids and recycle them to prepare for new drilling fluids, the new drilling fluids will be reused for drilling rig. As one of the solids control equipments and system manufacturer in China, GN solids control can produce complete line solids control equipments, including linear motion shale shaker, elliptical motion shale shaker, mud cleaner, desander, desilter, vacuum degasser, decanter centrifuge, mud agitator, centrifugal pump, mud gas separator, vertical cuttings dryer, mixing hopper, shaker screens, screw pump, screw conveyor, etc.

The single layer shaker screen with 4pcs panel shaker screens with 2.73m2 screen area, the equipped shaker screen is composite material frame shaker screen for longer working life and better separation performance. The mud cleaner with same model bottom shaker, the client can stock the wear parts convenient, the desander cone and desilter cone are installed with 1500gpm treating capacity. The cone is made of 100% polyurethane for better abrasion resistance. We can provide mud cleaner feeding pump – centrifugal pump, complete with pump head, explosion proof motor, pump skid, pump control panel, coupler with cover, etc.

The GNLW454ET-VFD decanter centrifuge is a high ratio 18 inch bowl decanter centrifuge with VFD control panel. The bowl diameter is 18 inch, the bowl length is 74.5 inch, the designed capacity is 400gpm, the typical treating capacity is 300gpm, The max bowl speed is 3500rpm, typical bowl speed is 0~3200rpm. Max G force is 3084G, typical G force is 0~ 2578G. The screw is protected by tungsten carbide tiles, the fluids distribution port and solids discharged port is protected by tungsten carbide alloy. Normally we use screw pump as decanter centrifuge to adjust the flow rate easily.

GN solids control design and produce 240m3/h, 360m3/h, 500m3/h TBM Slurry Separation Plant, which is suitable for big TBM project. The features of GNTBM slurry separation plant:

1.    Compact design, module design, integrated design, small footprint, easy transportation
2.    Customized design, can change our design as per client’s requirement
3.    5 phase separation, the discharged solids is much drier, and the fluids is more clean
By assembly different modules, we can provide more different treating capacity system.
Basic model:

GNTBM-240 ( 240m3/h)
GNTBM-360 ( 360m3/h)
GNTBM-500 ( 500m3/h)
Assembled model:
GNTBM-800 ( 800m3/h)
GNTBM-1000 ( 1000m3/h)
GNTBM-1500 ( 2000m3/h)
GNTBM-2000 ( 800m3/h)
GNTBM-2500 ( 2500m3/h)
GNTBM-3000 ( 3000m3/h)
Recently one set of 360m3/h TBM slurry separation plant are ready for shipment to pipe jacking engineering company. The technical configuration is as below:
1.    Coarse solids separation shaker : GNZKR-1230, 1 set
2    Double deck mud cleaner :GNZY705E-Y3S16N, 1 set
the bottom shale shaker is a double deck shale shaker, with 3 ea of 10 inch desander cone and 16ea of 4 inch desilter cone , the total treating capacity is 360m3/h. the screen area is 4m3. The vibration strength is max 7.5G ( adjustable)
3 Desander feeding pump is GNSB8X6-14/12J, desilter feeding pump is GNSB8X6-14/12J.
4.    The system frame is 6058 x 2438x2891mm, with fluids catching tank, during transportation, the coarse solids separation shaker will be disassembled.
The 5 phase separation process including:

Pre-treatment : coarse solids separation, to separate the big solids, stones, sand
Desander cone separation, the separation cut point is 45 microns
Desilter cone separation: the separation cut point is 20 microns
Mixing: the collected fluids will be used to prepare for new fluids to be reused.
Decanter centrifuge: the separation cut point is 2~5 microns
If you need a customized solution for TBM slurry separation plant, pls contact with GN solids control.

3 phase disc centrifuge and 3 phase decanter centrifuge is 2 equipments normally used for oily water separation, both of them have their advantages and disadvantages.
The comparison is as below:
Both of the 3 phase disc centrifuge and 3 phase centrifuge are for light liquid, heavy liquid, and solids separation, just one is vertical centrifuge, the other one is horizontal centrifuge.
The working principal is different:

3 phase Disc centrifuge: the oily water is feed into the disc centrifuge, under the centrifugal force, the material pass through the disc bundle separation intervals, the light liquid and heavy liquid are discharged by the lower centrifugal pump and the upper centrifugal pump respectively, the solids is discharged regularly.
3 phase decanter centrifuge: when the oil sludge is feed to the centrifuge inlet pipe and enter into high speed bowl, the material rotates synchronously with the bowl.The centrifugal force became less from outside to inside. The solids are pushed by the screw conveyor, the water is discharged from the nozzle in the upper, the oil is discharged from the bottom nozzle .

The disc centrifuge can be applied for materials with fine solids and with less solids content, so the material to be feed to disc centrifuge is very strict limited, the solids content should be less than 3% and the particle size is no more than 1mm, so normally we will use a decanter centrifuge before the disc centrifuge, to reduce the solids content and separate the big solids from the oily water/ oil sludge. So the cost of the proposal with a decanter centrifuge and a disc centrifuge will be definitely higher than 3 phase decanter centrifuge, but the treatment result will be always better, it can meet the requirement for oil recovery, solids disposal safely and water to be sent to waste water treatment.