Blue Flower

Decanter centrifuge is an important and relative cost high equipment in solids control and drilling waste management equipment. It has an important role on the total system performance. There are so many companies announced for decanter centrifuge manufacturing, especially in China. But do you know how to choose the right one for your drilling waste management project?

As the first China solids control manufacturer who have warehouse in Houston, GN Solids Control give suggestions as below:
1) Check the parameters: To check if the offered centrifuge can meet your request.
2) Check the company’s project list, to make sure they have experience on your field. If you are searching for a centrifuge for drilling cuttings treatment, companies who make centrifuge for pharmaceuticals industry, food industry or solids control should not be suitable. If possible, to talk with the people who used their equipment or to check their jobsite.
3) To check the centrifuge material: For drilling waste management, centrifuge materials should be the highest ranking. It should be very strong and good performance for anti-abrasive.
Bowl material: Duplex Stainless Steel 2205 by centrifugal casting is the best. Derrick centrifuge and Swaco centrifuge made by it. It is excellent and reliable. SS316L is the second option. While SS304 and SS302 not recommended.
4) Screw protection: best option is interchangeable Tungsten Carbide Tiles. Second option is ceramic tiles if your budget is very tight, or just want a cheaper one. Hard surface welding for screw project is not recommended.
In the first year or half year, there maybe not much difference, but after 1 year, the hard surface welding will be worn out. It is difficult for maintenance, and you have to make balance again after welding repair. But the interchangeable tiles, you only need to remove the broken one and change it with a new one.
5) To check the companies’ facility and capability. Centrifuge manufacturing have a high standard request on manufacturer’s capability. It you intend to order from a company, it is better you pay a visit to their company, to check their workshop, see which material they use, how they make, which kind of processing machine they have. CNC machine and Five-face processing machine, dynamic balance machine is the necessary for centrifuge processing.

6) VFD Control panel: Possitive pressurized VFD panel with self-cooling is necessary. Flameproof cannot cool down and cannot exactly meet the EX standard. 3 VFD for main drive motor, back drive motor and feeding pump also the best. If there is PLC for smart control, perfect.


7) To check the price: The lowest price surely can be considered. If the price is even much lower than the market average, where they get benefits? Surely the quality cannot be good.
8) To check besides decanter centrifuge, what other equipment they can make for drilling waste management, like high G dryer shaker, screw conveyer, dewatering unit... If they can meet all above, and they can offer you complete solution on drilling cuttings treatment.
If there is a company can meet all of them, then you can consider. If you have any other questions on solids control equipment or drilling waste management, welcome you contact GN Solids Control freely.

Water base drilling mud is one of the most popular drilling mud in oil and gas drilling field. Compared with oil base drilling mud and synthetic base drilling mud, water base mud have a lower pollution on environment, it is relatively lower cost, and easier to generate the drilling waste.
Draftly speaking, there mainly 2 kinds of system will be used to water based mud in oil and gas drilling field: mud Solids control system and drilling waste management system.  
 
Solids control equipment for water base drilling mud management system
1) The first stage solids control equipment shale shaker, recommend model GNZS549E
2) The second and third stage solids control equipment mud cleaner. It is a combination of desilter, desander and under flow shale shaker for compact design. Customer can choose different model mud cleaner per drilling capacity request. Sometimes per different jobsite request, customer can even choose separate desilter, desander with or without underflow shale shaker.
3) The fourth stage solids control equipment decanter centrifuge. In this stage, the jobsite normally use lower speed 1800~2200rpm for barite recovery, and/or a high speed centrifuge for fine solids control.

Drilling cuttings treatment system for water based mud
1) High G dryer shale shaker, model GNZS594HGE. It is a four-panel shale shaker with the same replacement shaker screen with Swaco Mongoose shaker.
2) Decanter centrifuge high speed for drilling waste management, with a telescopic skid underneath
3) Screw conveyer to transfer drilling cuttings

   

In some cases, if there are too much fine solids in the fluids phase from drilling waste centrifuge, and it cannot be separated by decanter any more, dewater unit will be used.
Dewatering unit with dewatering centrifuge is a normally used for water base mud drilling cuttings treatment. It is used to supply chemicals to polymerize the fine solids into bigger size that centrifuge can separate.
After solids control separate, drilling waste separate, and/or dewatering treatment, the clean fluids can be transferred to mud tank system for drilling. Or if there is no drilling activity, the fluids can be transferred direct to slurry separation company for waste water treatment.

GN Solids Control is one of the most professional manufacturer for mud solids control system and drilling waste treatment system for drilling filed. GN offers complete solution for oil and gas drilling, horizontal directional drilling (HDD), coal bed methane (CBM) drilling, piling, micro tunneling, water well drilling and other underground construction activities.
Recently, GN Solids Control company made a complete mud cleaning system for Coal Bed Methane (CBM) drilling for East Asia market. The CBM rig mud system consists of double deck shale shaker, mud cleaner with only desander cone, dewatering unit with decanter centrifuge for dewater unit. The total system can control the solids content effectively, normally, after GN CBM mud system, the solids separation can be reduced to 5μm ~ 15μm. The GN CBM mud system can also mix qualified drilling mud for the CBM drilling rig. The system can increase the drilling speed and prolong lifetime of the mud pump and drilling rigs. Combined with GN drilling waste management, GN CBM drilling mud system can generate minimum drilling waste to reduce the effect to environment.


Equipment list and the treatment process of the CBM drilling mud system
1) Double deck shale shaker model GNZS705E
The first shaker deck use steel screen with size 1mm to separate coarse particles over 1mm. The solids discharge and transferred by screw conveyer. Clean fluids falls down to the bottom deck and further separated by fine screens of the bottom deck and then fall into mud tank.
2) Mud cleaner GNZJ703E-3S. The mud cleaner with a big shake GNZS703E, and with only desander cone, without desilter cone. After separated by the desander cone, clean fluids enter into mud tank and mud tank.
3) 40ft containerized Dewatering unit with 3 compartment for continue flocculate. The whole flocculate system mounted into a 40ft fabricated container, complete with a decanter centrifuge big bowl GNLW553VFD and a feeding pump for the centrifuge.
For more information of GN CBM drilling mud system or GN dewatering unit or any other equipment, contact us freely.

Decanter centrifuge is widely used for different field and applications. GN Solids Control (GN Solids America) is a worldwide manufacturer for mud solids control equipment and drilling waste management equipment. Decanter centrifuge is the most powerful and advantaged products of GN Solids Control.

drilling Waste decanter centrifuge
Below are some applications of GN brand decanter centrifuge:
1) Diamond drilling and coal bed drilling
2) For waste water treatment
3) For low gravity solids separation and high gravity solids separation in drilling rig site, like barite recovery and fine solids separation
4) Drilling waste management system
5)  Water/Oily Waste Treatment  

Recently, a customer request decanter centrifuge system for water / oily waste treatment. After face to face talk with customer for their request , and per his jobsite condition, GN engineering team recommend 2 centrifuge packages for the customer:
1) Decanter centrifuge for Water/Oily Waste Treatment
It is composed of big bowl centrifuge and feeding pump
1.1) Centrifuge model GNLW453VFD. It is a big bowl centrifuge for big volume capacity. The centrifuge is with bowl size 18’’  
1.2) Feed pump for the Big bowl centrifuge GNG60A-150
 centrifuge for water oily treatment
2) Centrifuge for Water/Oily Waste Treatment lower capacity for mobility
Vary from the big volume Water/Oily Waste Treatment system, GN made a combined centrifuge packages, It is components of a 14’’ normal size decanter centrifuge, centrifuge feeding pump and a portable frame to combine all the items.
1) 14’’ centrifuge model is GNLW363BG-VFD, it is GN high standard for international market.
2) Feeding pump for the centrifuge is GNG30A-075, the pump is from German brand company: Netzsch.
3) A Skid mounted frame, centrifuge, VFD control panel and feed pump all mounted on the skid. It is fast for the customer to lift the whole package on trailer skid for fast movement.
This package with a small capacity then 18’’ centrifuge and the centrifuge is also small size. The whole package can be put into container for international vessel shipment.

Beside the Centrifuge packages for Water/Oily Waste Treatment, GN can make other customized package and system for different applications, like HDD system, CBM system, mud solids control system. If you have any question, welcome you contact GN group freely.

Screw Conveyor is called Auger Conveyor, in oilfield drilling waste management, it is widely used for drilling cuttings transfer to feed to the drilling cuttings dryer.

Normally, totally 3 screw conveyor are needed for the drilling cuttings dryer system.
Two screw conveyors will be deployed between the mud cleaner and shale shaker and the vertical cuttings dryer unit to transport drilled cutting discharged from the rig shakers and the mud cleaner to the drilling cuttings dryer. The length of the first screw conveyor depends on the mud tank solids control equipment layout, normally 25 meters is required for the 3 shale shaker and 1 mud cleaner drilling cuttings discharge.

Drilling Cuttings Screw Conveyor

The third screw conveyor is required to remove the processed dry  cutting from  Vertical cuttings dryer  to the drilling  cuttings  skips.  The Screw conveyor under the shale shaker and mud cleaner is  about  25m length  will  be  placed  on  top  of  the walkway in front of the shakers and mud cleaner with enough extension to allow for an emergency skip to be placed before the second screw conveyor. This Screw conveyor will  be used both during WBM drilling phase and OBM drilling phase. Two discharge holes with a sliding plate will be made on the screw conveyor to allow for cuttings discharge into the coral during
WBM phase and to be closed during OBM phase. A third discharge hole will be towards the end of the auger extension to discharge into a drilling cuttings skip in case of emergency repair or maintenance on the Vertical Cuttings Dryer.

The next Scew conveyor (2) about 10 mtr length will be at an angle (90Deg) from the first screw conveyor, facing the coral direction. This screw conveyor will be inclined vertically to about 10-15 deg off its swivel base line, to be able to discharge drilling cuttings at the top/feed end of the drilling cuttings dryer.

The third (3) conveyor about 6 mtr length will be installed beneath the Drilling Cuttings Cryer chute and inclined outwards to fill the double skip arrangement.

GNLW553VFD is a High Throughput decanter centrifuge for drilling field. It ultizes big bowl and high speed for big volume. GN offers Variable speed centrifuge including feed pump unit, complete with all required starter boxes, hoses, cable, transformer, power pack and control panel for worldwide market.

GNLW553-VFD centrifuge utilize positive pressurized control cabinet for explosion-proof. And the VFD panel equipped with PLC system for smart and automatic control. Besides vivid control on centrifuge performance parameters, another big advantage of GN High Throughput decanter centrifuge is smart control.

decanter centrifuge high throghput

We take maintenance for example. Bearing is a main and most important part in high speed rotating equipment like centrifuge, and it is cost high. Good and regular Lubrication is necessary for a reliable performance and longer lifetime of bearing. Different bearing, the lubrication duration is much different, from 48 hours from 1000hours. People have to make many records to insure regular maintenance. And normally, it is that, they remember to lubricating when there is abnormal performance. It is not good. With the PLC smart system, works no need to make the record. The PLC system will reminder you for necessary maintenance at due time.

Decanter Centrifuge – High Throughput Specification

Model GNLW553VFD
Bowl Diameter 550mm(22inch)
Bowl Length 1800mm(71inch)
Max. Capacity 484GPM(110M3/h)
Effective Capacity 400GPM(90m3/h)
Max Bowl Speed 3000PRM
Typical Bowl Speed 0~2600RPM
Max G-Force 2719
Typical G-Force 0~2080
Separation point 2~5μm
Differential Speed 1~50 rpm
Main Drive Motor 90KW(120HP)
Back Drive Motor 37KW(50HP)
Recommend Pump 22KW(30HP)
Explosion Standard ExdIIBt4 / IEC Ex/ ATEX
Electric Control Panel Pressurized PLC Stainless Steel
Weight 5840KG
Dimension 4360x1978x1442

Applications of GNLW553VFD High Throughput decanter centrifuge

1) Oil and gas drilling mud solids control system

Normally, 14 inch centrifuge used in solids control system. As a trend, more and more drilling company they prefer to no use desander, desilter mud cleaner. They only used shale shaker as 1 stage separation. That request a high standard on decanter centrifuge performance.

2) GNLW553 Decanter Centrifuge is a big bowl big volume centrifuge for fast drilling or the high volume mud like Tunneling.

3) Drilling waste management or waste water treatment for High Throughput

4) Soil decontamination for High Throughput