drilling mud centrifuge

This week, a batch of solids control equipment was dispatched from GN Solids Control. The equipment will be used in Chinese rig site for a drilling rig mud circulation system.

It is a set of full package solids control mud processing equipment including below equipment:
1) 2 sets of linear motion shale shaker: GNZS703F. It is a 3-panel shale shaker for drilling mud pre-separation.
2) 1 set of desander mud cleaner, model GNZS752F-2S. The desander mud cleaner is equipped with a big under flow shale shaker the same model with first stage solids control shale shaker. It is easy for clients to stock spare parts and replacement screens for both shale shaker and mud cleaner.
3) 1 set of Desilter mud cleaner, model GNZS752F-12N. The desilter mud cleaner is equipped with the same under flow shale shaker with first stage solids control shale shaker and desander mud cleaner.
4) 2 sets of Decanter centrifuge, model GNLW452. It is a economic standard middle speed decanter centrifuge for barite recovery.
5) 2 sets of mud tanks.
6) 1 package of jet mud mixing system.

Besides the mentioned equipment, GN Solids Control is also capable to make drilling mud agitator, mud gun, centrifugal pump which are fully interchangeable with international popular brand, other VFD centrifuges, FHD decanter centrifuge, Vertical cuttings dryer, high G dryer, screw conveyor, and various model replacement shaker screens for different brand shaker models.

GN VFD decanter centrifuge is with advantages for self-protection and smart control.
The LPC program of GN hydraulic centrifuge is with below self-protection functions:
The start/stop of the hydraulic centrifuge and the start /stop of the centrifuge feed pump are logical connected for protection.
1. After start the centrifuge, only after the centrifuge bowl achieve the preset speed and running for some seconds, the feeding pump can be started for feeding mud.
2. When the decanter centrifuge is stopped, feeding pump cannot be started.
3. During the centrifuge running, the centrifuge will not be cut off if directly press the centrifuge stop button. Only by pressing the stop button of the feeding pump and stop the feeding pump, and then the centrifuge can be powered off.

A few weeks ago, GN Solids Control had a shipment for some solids control equipment to a client in Uzbekistan. Soon, the equipment will be used in extreme cold regions of Uzbekistan. The lowest ambient temperature in the area can be below minus 50 degrees Celsius.

This is not the first time that GN Solids Control has sent equipment to the extremely cold regions of the Commonwealth of Independent States (CIS).  4 years ago, in 2014, some package of drilling cuttings drying system was dispatch to Baker Hughes in Russian. The systems were running from 2014 till now. End users are very happy with GN products quality and GN services. Since they have other Chinese brand equipment in other jobsites, after comparison, end users said GN vertical cuttings dryer and decanter centrifuges are the best from China.

The solids control equipment will be used in clients’ drilling rig mud system for mud processing, the shipment is including following processing equipment:
1) Some linear motion shale shakers. It is the first stage solids control equipment in drilling rig mud system.
2)Some Mud cleaners. In rig mud system, mud cleaner is used after shale shaker. The desander can clean the mud to 50 microns, while the desilter separator can separate the drilling fluids to 27 microns.
3)Some Decanter centrifuge. There will be at least 2 sets decanter centrifuges in a complete drilling mud processing system. Firstly, a middle speed decanter centrifuge at 1800 rpm will be used to recovery the barite. After some circulation, there will be too much ultra fine solids inside the drilling mud, a high speed decanter centrifuge can be used to reduce the mud weight.

Furthermore, GN Solids Control is with rich experience to offer processing equipment for high temperature areas in Middle east and Africa, like in UAE, Kuwait, Iraq, Qatar, Yemen, Oman, Saudi, Algeria, Egypt, Ukraine, etc…In these areas, the highest temperature can up to +55 degrees Celsius. GN Solids Control is capable to make solids control and drilling waste management equipment for cold temperature areas to minus 50 degrees Celsius and to high temperature areas up to +55 degrees Celsius.

In past couple years, besides the petroleum industry, GN also tried expanding the business to some other fields. The big bowl decanter centrifuge and dosing system are two of the main equipment that widely used in environmental protection for waste water treatment. The decanter centrifuge is used to remove the solid particles in the waste water, used together with the dosing system; the treated water could be discharged directly with national standard for environmental protection.

GN Decanter Centrifuge

Dewatering Centrifuge

By now, GN has already developed he big bowl decanter centrifuge for dewatering process. A very popular model GNLW553 in GN’s production line is the unit with 22 inch bowl diameter. The bowl length is over 3 times of the diameter. This is not the largest model GN can make. In near future, GN’s decanter centrifuge especially used for water treatment will be released. The model series would be 454 and even 554.
GN’s decanter centrifuge is VFD available for main motor, back motor and the feeding pump. All the electric components used come from worldwide famous brand. Operator could set the RPM on the HMI panel and monitor the machine running conditions.

The dosing system is designed containerized with all the components are installed inside the container. GN has both 20 feet and 40 feet model. Clients could choose high configuration that including automatic dosing system and acid/alkali mixing tank or simple polymer mixing tank.
The cured flocculation polymer is fed to the waste water and then the ultra fine solids will be gathered to become large size blocks for easy separation by the centrifuge.

Polymer Dosing System

Dosing System

Features of GN Waste Water Decanter Centrifuge
1. Speed adjustable as per treated waste water condition
2. Humanized HMI operation for easy operation and reducing of manpower
3. Low consumption on polymer and energy comparing with filter press
4. Considerable protection for solids discharge port and scroll for longer lifetime

GN will release more models of decanter centrifuge for environmental protection waste water treatment. Any questions, please feel free to contact GN know.

GN now has over 30 high configuration decanter centrifuge stocked for urgent request and prompt delivery. The decanter centrifuge is normal type equipment used in the drilling fluids recycling system for fine solids separation. As a leading manufacturer of solids control equipment in China, GN always makes the inventory plan for the main equipment that most requested by the clients, like the shakers, decanter centrifuge etc.

What are the basic technical parameters of the decanter centrifuge
1. Size: 14 inch of bowl diameter, 50 inch of bowl length, this length and diameter ration is fine for most of the application
2. Treating Capacity: Max. capacity of 200 GPM with recommended capacity of 132 GPM
3. Speed: Designed Max. speed is up to 3900RPM with recommended normal working speed of 3200 RPM.
4. G Force: 2062 @ working speed 3200 RPM, under this speed, the solids with size larger than 5 microns could be removed out.
5. Gearbox: Torch of 3500 N•M, gear ration 57:1
6. Motor Power: Dual motors as main and auxiliary drive, 37 KW + 11 KW

gn-decanter-centrifuge-inventory

GN Decanter Centrifuge In Stock

What is the configuration the decanter centrifuge in stock
1. Material: Bowl is made of Duplex stainless steel 2205, screw propeller is from SS 316.
2. Bowl Fabrication: Centrifugal Casting technology ensures better material distribution to maximum avoid casting defects.
3. Protection: Screw propeller is protected by the tungsten carbide tiles with uniformly thickness of 4mm, much better than spraying welding 2mm uneven surface. Solid discharge ports are protected by ceramic lining for long life time and less maintenance. Collection box has air spring for easy open and damping close to protect operator.
4. Bear Brand: Genuine SKF bearing for longer and reliable operation
5. Control Panel: Both fixed speed and VFD panels are available as per customers’ requirements. Main electric components are from ABB, Siemens or Schneider.
6. Certificates: CE certificate for main machine, DNV lifting certificate for frame base, ATEX/ IEC Ex certified electric motors and panels are available hazardous area application.

Sufficient inventory is a guarantee for customers’ urgent request and prompt delivery. Now is near the end of the year, and GN is starting the customers profit surrender plan. Call GN no hesitation and you can get a special discount.

Drilling cuttings would be produced when drilling. In order to recover and reuse the drilling fluids, the operator need remove the drilling cutting from the drilling fluids. The well known equipment to remove the cutting from drilling fluids is the solids control equipment. So, what is the cuttings dewatering system? And how it works to remove the cuttings in the drilling fluids?

The drilling fluids with cuttings coming from the well hole is fed to the shale shaker unit via the elevated pipeline, this the method used in oil rig package. For some other drilling project, like the no-dig horizontal directional drilling, the used drilling fluids would be collected into a pit on the ground, and then the fluids would be transferred by a slurry pump to the shale shaker unit.

cutting-flocculation-polymer-dosing-system

Mud Dewatering

Shale shaker unit is the first stage for removing the coarse size cuttings in the drilling fluids. And then the de-sander and de-silter cyclone could remove out the cuttings with size down to around 20 microns. The used drilling fluids treated by the de-silter cyclone are already clean enough to be reused. However, the cuttings with size less than 20 microns would build up to make a heavy mud which is not suitable for normal drilling application.
The dewatering system is especially equipped to remove the ultra fine solids that even cannot be separated by the decanter centrifuge unit. A decanter centrifuge like GN’s 22 inch model GNLW553 can remove the cutting with size down to 5 microns. For the even finer cuttings, we need a flocculation process to gather the ultra fine solids so that the decanter centrifuge could remove out. The polymer mixing system is a critical part of the dewatering system, GN’s polymer mixing system is designed with powder hose conveyer, automatic dosing system, mixing tank and diaphragm pump for transferring the polymer to the drilling fluids. For better flocculation process, always one acid tank and one alkali tank is equip to make the suitable PH value.
Sometimes, the drilling fluids are mixture of water and oil, GN is also able to provide the oil water separator system for recovering the water and oil.
GN now has already have the design of the complete system for drilling cutting dewatering system, for more
information, please feel free to contact with us.

GN Solids Control is the 1st one manufacturer in China who ever sent the drilling cuttings solidification unit to client’s jobsite. It was predictable that many comments regarding the performance of GN solidification unit would come back. More important is how to response to these comments.
GN is always keeping developing new products, which is the reason of the first unit drilling cutting solidification unit coming from GN. Some of the comments on GN solidification unit are positive, while some are very good suggestions for GN to perfect the design. The unit sent to site was designed whole assembly installed on one skid, which makes the unit too long to move and locate the unit easily. The new design divides the machine into 2 parts; one is for solidification agent storage, the other part is for mixing. These 2 parts could be located more freely according to the site space. Comparing with old model, the new one has larger tank for agent storage, on top of the tank, hand rails are installed. The agent bag pallet could be put on top of the tank, which greatly increases the working efficiency. Though 2 parts, the whole system still could be put into one 40ft container for oversea transportation.

GN-drill-cutting-Solidification-unit

Cuttings Solidification Unit

The drilling cutting discharged out of the shale shaker and decanter centrifuge could be fed into the solidification unit for treatment. However, there is a misunderstanding on the performance of the solidification unit: No matter how wet the cutting is, so long it is fed into the solidification unit; the dry material will come out. This is not correct. The much wet the cutting is, the more solidification agent will be used. Hence, the operator should make the cutting as dry as possible before feeding into the solidification unit.
GN’s solidification unit was proved greatly saved the man power on site as it can working continuously, the speed could also be adjusted as per the working condition. Solidification unit is one of the final solutions for water base drilling cuttings. Easy operation and maintenance are its advantages.

Diamond core drilling is a type of drilling used to get the stratum samples so that the geological experts could analyze what under the ground, and if there is mineral reserve, how deep need to be drilled for exploitation. Diamond core drilling always uses tube type drill bit for getting a cylinder earth sample. The drill hole is not too big to use plenty drilling mud. However, on consideration of environmental protection, the recycling of the
drilling mud is firmly requested, which is also a method of cost saving.

gn-solids-removal-unit (1)

GN Solids Removal Unit for Diamond Drilling

The drilling mud recycling system of the diamond core drilling can also be called as solids removal unit. As the drilling site of diamond core drilling is always space limited. The solids removal unit needs to be as compact as better. GN has 2 equipments that are made especially for diamond core drilling: Mini shaker and Mini centrifuge unit.
GN Mini shaker is 2-panel screen design with vibration G force up to 7.1 that is used to remove the coarse solids in the drilling fluids. Heat treatment on whole shake deck greatly strengthens the deck to ensure a better performance on drying the solids.
GN Mini centrifuge is 2-phase type for solids and liquid separation, 9 inch bowl diameter, with speed up to 3800RPM, the centrifuge could effectively remove the solids with size of 2 microns in the mud. Stainless steel material of the bowl guarantees the good working for all kinds of chemical liquid. The protection of tungsten carbide tiles on screw and ceramic casing at solids discharge port significantly extends the life time of the centrifuge.

gn-solids-removal-unit (2)

GN 9 Inch Centrifuge

The mini shaker and mini centrifuge could be ordered separately as well as included in GN’s solids removal unit. By fixing the shaker and centrifuge unit on a tank, GN could provide clients a very compact mini mud recycling system-SRU. GN SRU can also do the job for re-configuration the drilling mud. GN also has modular type solids removal unit which is transportable by helicopter to remote area.
GN solids removal unit could greatly decrease the solids content in drilling mud so that to make the drill bit down hole perform well. It could greatly reduce the consumption for water and drilling mud, which is a large saving and benefit for environment. GN now has brochure especially for solids removal unit, any interests, please feel free to contact with GN.

To be a professional manufacturer for solids control equipment, GN has nearly 10 years experience on decanter centrifuge research and fabrication. With these years development, GN decanter centrifuge have been supplied to the many giants in the oilfield industry. Subsidiary company of Halliburton, Baker Hughes, COSL and some other world famous company tried GN decanter centrifuges and gave good remarks.
A company has to keep improving if he wants to live for a long time. GN is an example for continuously upgrading the existing equipment and developing the new products according to the market feedback. At the beginning of foundation of GN Solids, GN only made middle speed decanter centrifuge that can only be used in normal drilling fluids recycling system, like barite recover process and some high speed unit could be used in fine solids separation. The middle speed model and high speed model will be kept in the same one mud recycling system.

gn-centrifuge-for-baker-hughes

GN Decanter Centrifuge for Baker Hughes

Thanks to the many kind clients’ feedback and valuable suggestions, the only thing GN did in the past years was to perfect the design of the centrifuge and improve the quality. Nowadays, GN’s 4th generation decanter centrifuge is under design processing. The best seller of GN C version decanter centrifuge could be electric controlled as fixed speed or variable speed. The PLC design high standard positive pressurized control cabinet is available. Top quality centrifuge bowl material duplex SS2205, optimized feeding direction and high standard material for solids discharge touching parts make GN decanter centrifuge could be adopted in waste cuttings management system, drilling fluids de-watering system, and crude oil tank bottom sludge cleaning out of solids control system. In the past two years of winter of oil business, it was widely application of GN’s decanter centrifuge that brought GN many orders which kept GN alive, even became bigger than ever before.
GN’s second facility close to HQ will be launched into use very soon. This facility is specialized used to develop centrifuges. Most industries could be a GN’s future market like the sewage treatment, environmental projects and food industry. Actually, it is because many inquiries coming from these industries, which urges GN to expand into these areas. Where there is a request, there is a market.

GN’s decanter centrifuges are 2 phase type and mostly used in oilfield for drilling fluids fine solid particle separation and waste management as GN is known as a China leading professional manufacturer for solids control equipment for oil & gas industry. However, according to the working principle, the centrifuge should be able to be used in some other industry for liquid and solids separation just like the dredging slurry separation and construction site solids removal.
GN ever sent one solids removal system including shale shaker and decanter centrifuge to London for the construction project there. On the construction site, the worker may use water to wet or mix some construction material. Nowadays, most of the office building has parking area at the ground floor of the building. When the beginning of building, the workers will operate the rotating drilling machine to drill some holes on the ground for piling. This type of drilling will also need water for cooling down the drill bit and take out the drilling cuttings from bottom of the drilling hole.

GN-SOLIDS-REMOVAL-LONDON

Solids Removal Unit

GN’s solids removal system is used to separate the solids and liquid. On construction site, it will be used to remove the stone and other large size solid particles from the water. The unit sent to GN’s customer in London was a 2 phase solids control system. The configurations are as below:
1 unit shale shaker with 3-panel screens for primary solids control could remove most of the large size solid particles. The solid particles on construction site would be various from sand, stone, leaves and waste cans. The shaker could remove almost all the coarse particles by using the wire mesh screens.
1 unit decanter centrifuge with speed up to 3200 rpm is used for fine solids separation. GN’s centrifuge is made of excellent material on bowl and screw propeller for long lifetime and easy maintenance.
1 mud storage tank is divided into two compartments for sand trap under the shale shaker and clean liquid collection under the centrifuge. 2 pumps are installed on the tank skid. One of the pump transfers the slurry from sand trap compartment to the centrifuge, another one is used to transfer the liquid out from the tank for reusing.
GN’s mud tank system is with the CE certificate thus the clients from Europe could use GN’s mud system freely without worrying about the compliance. For any request, welcome contact GN for more information.

Most of the horizontal directional drilling mud system is not equipped with decanter centrifuge unit as by using the 3-phase separation system including shale shaker, de-sander and de-silter unit, it can work good enough for removing the solids from drilling fluids. Centrifuge is relative high cost, which is also a reason the drilling contractor doesn’t equip it in the mud system.

gn compact centrifuge system

GN Centrifuge System

However, for some high request drilling condition, the driller may use the heavy mud for better drilling performance. Sometimes the drillers add the certain chemicals to make the drilling mud heavier so that the mud can better protect the wall of the drilling hole. If the driller went to drill another well, the heavy chemicals need to be separated, and then the centrifuge could be used to do this job. In some other conditions, after many times recycling of the drilling mud, there is much ultra fine solid particles that cannot be removed by the shaker and cyclone unit, and then the centrifuge unit is needed.
GN Solids Control has nearly 10 years in fabricating the drilling mud system for HDD projects. This type mud system need to be compact structure and easy for transportation. See the picture in this article, both the de-sander and de-silter unit are equipped with under flow shaker for drying the discharged solids. The shakers used are 2-layer screen design. The bottom layer screen is used as primary shaker and upper layer screen to dry the discharges out from the cyclone units. This design greatly reduces the footprint of the mud system. And all tank top surface equipment are pre-installed on a frame with same base dimension as storage tank. When transport the mud system, the shaker and decanter centrifuge units could be removed by lifting the frame for fast disassemble. With the frame, the equipment could be easily transported by flat bed trailer.
GN can provide both standard and customized HDD mud system for clients. Just send us your request, and then you will get a satisfying and cost effective solution.