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After oil and gas well drilling, there are a lot of drilling fluids cannot be used, as the drilling job is finished. The drilling mud may come from the usual solids control equipment which is used for oil well drilling mud recycling system, like from shale shakers, desanders, desitlers, mud cleaners, designers, degassers. And in some oil well drilling rig sites, the drilling mud may come from the decanter centrifuge separation.

And the drilling fluids are hazardous to environment. They are not allowed to be discharged into environment directly. Clients need to treat the used drilling mud after drilling well finished. The solid equipment mentioned above are used for the circulation of drilling mud. But after drilling, there should be another separation equipment to treat the recovered clean drilling fluids. The new approach is to dewater the drilling mud after use of drilling mud to reuse water.

Drilling mud used in oil well drilling is recovered from solids control equipment like shale shaker, mud cleaner, desander, desilter and decanter centrifuge, there is no big size solids side the solids. The PSD (particle size distribution) is variable but around figure will be 30% of below 5 microns. If it is water base mud, the water content is around 80 ~ 90%. And the solids content is 10 ~ 20%. There is no oil for water base mud.

In this case, clients will need to do dewatering treatment to recover the water from drilling fluids for reuse. This is a conventional dewatering of water base mud to produce reusable water and the challenge is on the economic side as the effluent water must be of the same price compared to landed price to rig site of fresh water. After dewatering treatment, clients want to get Semi clear water with neutral pH reusable (water parameters still to be determind).

If you are interested for the proposals to dewartering the used drilling mud from oil well drilling, please visit the GN Solids Control website:
Or contact GN Solids Control sales engineers.

GN Solids Control is a mainly focusing on liquids and solids separation. GN Solids Control is capable to make waste water treatment system. GN Solids Control can make waste water treatment system to treat both oil slurry and non-oil slurry. The separation system for oil surry and non-oil slurry is not the same.

GNWTU-50A is a waste water treatment Unit specially design and made by GN Solids Control. The waste water treatment Unit is a special designed system for construction mud settlement, as well as for industrial waste water settlement. The maximum discharge rate of the GNWTU-50A waste water treatment Unit up to 50m3/h. It is a system designed to treat non-oil slurry.

GNWTU-50A waste water treatment Unit can be used for medium size sites such as civil engineering projects, or building project, like piling, and micro tunneling etc…

After the chemical dosing separation application, the suspended solids content can be below 50 mg/liter. In this case the treated water can be either discharged into the public drainage system or recycled for further use. The treated water can be reused of as drilling fluid, vehicular washing bays, recharge of wells, toilets, cube curing, ponding tests. This saves a lot of cost for water and protects the environment.

GNWTU-50B Wastewater Treatment Unit is a special designed system for oil water and solids separation system. Maximum discharge rate of GNWTU-50B Wastewater Treatment Unit can up to 50m3/h. GNWTU-50B Wastewater Treatment Unit is designed for industry waste water with suspended solids and free oil.

The chemically enhanced separation reduces the suspended solids content below 50 mg/liter and free oil to be below 10 mg/liter.

In this case the treated water can be either discharged into the public drainage system or recycled for further use. The treated water can be reused as drilling fluid, vehicular washing bays, recharge of wells, toilets, cube curing, ponding tests or industrial applications.

This saves a lot of cost for water and protect the environment.

GN Solids Control is a professional manufacturer for liquid and solids separation. In order to rich the company’s product lines, GN Solids Control developed a separation brand: GN Separation. GN Separation (www.gnsepararation) is a separate brand developed by GN Solids Control.

GN Solids Control major business is oil and gas drilling mud separation and waste management, non-oil field drilling fluids cleaning and recycling, replacement shaker screen manufacturing, like solids control shale shaker, high G drying shale shaker, desander mud cleaner, desilter mud cleaner, degasser, decanter centrifuge, vertical cuttings dryer, centrifugal pump, jet mud mixing system, mud agitator, etc…

GN Separation is focusing on making more industrial separation equipment, like various sizes industry separation decanter centrifuge, disc centrifuge, 3-phase separation centrifuge, screw conveyor, etc…

This week, GN Solids Control and GN Separation will exhibit at IE Expo China 2020 in Shanghai. IE Expo China is exhibited in Shanghai Every July. It is the largest professional exhibition focusing on environment protection and solution:

http://www.ie-expo.cn/Overview/profileGN Solids Control and GN Separation will take the typical waste management equipment for showing to the clients. Unlike other equipment supply, they can only make some of the separation equipment, some one can only make shale shakers, some one can only make centrifuges, some one can only make chemical dosing system. GN Solids Control makes the full line separation equipment, and GN Solids Control is capable to combine the system to be a full function system. Below is the major production for the exhibition:

1) Oily sludge separation system.
It is a 1-skid modular unit C/W shale shaker separation, waste management high speed decanter centrifuge for liquid and soil separation, chemical dosing system, disc. Centrifuge for soil water and oil 3-phase separation. Transfer pumps, level meters, control panel, storage tanks, pipelines and other necessary accessories are included in the system in order to offer turn key solution to clients.

2) Slurry separation decanter centrifuge. GN Solids Control and GN Separation is capacity to make different bowl sizes centrifuges.

3) Sludge and solids transfer vacuum pump for long distance suction and discharge.

 

 

GN Solids Control makes different sizes mobile Dewatering unit. It is full package dewatering decanter centrifuge unit, which is complete with its own mixing, dosing and monitoring system.

The Dewatering Unit can be containerized, self-contained with all required equipment and suitable for offshore and onshore rigs. The objective of Dewatering Unit shall be to reduce liquid waste volume in such locations.

The Dewatering Unit can provide chemically and /or mechanically enhanced treatment of wastewater based drilling fluids using flocculation and coagulation methods of separating solids up to colloidal size for disposal and recycling the fluid for preparing new drilling fluid volume.

The Dewatering unit shall have fluid processing capacity such that it is able to effectively and efficiently process waste 10 ppg waste water based drilling fluid containing minimum 10% (v/v) solid particles of particle sizes ranging from 200 microns to <1 micron. The mud handle capacity depends on the decanter centrifuge bowl size.

The waste drilling fluids will be bentonite based fluid or polymer based fluid containing all chemicals normally used in drilling fluids, including but not limited to, barite, bentonite, calcium carbonate, marble, xanthan gum polymer, drilling starch, modified starch, polyanionic cellulose, acrylamide polymers, polyamine, latex polymers, sulphonated asphalt, ester based lubricants, phosphate based lubricants, graphite, cellulose fibers, sodium chloride, sodium bromide, potassiumchloride, calcium chloride, calcium bromide, sodium hydroxide, sodium carbonate, sodium bicarbonate, magnesium oxide, citric acid, defoamers, zinc carbonate, sodium sulphite, ammonium bisulphite, amine corrosion inhibitors, biocides, lime, etc. each in various concentrations as required by COMPANY’s drilling program.

The waste drilling fluid will also have formation-drilled solids predominantly from clay, shale, limestone and dolomite formations, formation oil traces, scale, etc…

The Dewatering unit includes all necessary pipes, hoses, tanks, vessels, valves, connectors, fittings, adapters, sampling points, flushing system, cooling system, electrical system, cables, protectors, control system and safety system (level, pressure, temperature, torque, emergency stop, system protection, etc.), spares, etc. The electrical system can be non-explosion proof for safety ares. It can also be Zone 1 which is suitable and safe for drilling rig’s zonal requirements.

The decantering decanter canl be fully operational on a continuous basis. The ambient temperature can up to + 55° C

GN Solids Control makes different sizes mud recycling and mud mixing system for HDD rigs, water well drilling rigs, etc… The popular size includes but not limited to 150GPM, 200GPM, 350GPM, 500GPM, 600GPM, 750GPM, 1000GPM, etc…

GN Solids Control makes different sizes and customized design mud recycling and mud mixing system to suit for clients request.

For example, a client contact GN to inquire a customized water well drilling mud cycling system for 500GPM ~ 1000GPM. The client want a customized mud recycling system equipped with 2 shale shakers, 2 desander mud cleaners, 1 desilter mud cleaner, 1 middle speed decanter centrifuge and the system should be complied with a mixing hopper and mixing pump unit.

The client wants both shale shakers and both desander mud cleaners should have the possibilty to use only one of them if client drill smaller borehole and uses smaller mud pump. GN Solids Control will equip valves at shale shaker distribution pipelines and desander inlet pipes to control the feeding. Clients can choose to use both or either.

2 shale shakers, 2 desanders, 1 desilter and centrifuge feed pump are located on #1 tank.
#1 mud tank will be divided into 3 compartments:
1.1 Both shale shakers feed the first tank.
1.2 Both desander mud cleaners feed the second tank.
1.3 Desilter mud cleaner will feed third tank. It is clean mud tank, Centrifuge feed pump sucks from desilter tank.

Decanter centrifuge, mixing hopper and mixing pump are located on the #2 mud tank.
#2 mud tank (for clean mud) will be divided in to 3 compartments:
2.1 decanter centrifuge tank, which suck mud from 1.3 desilter tank and feed the tank under it.
2.2 clean mud storage tank
2.3 mixing tank with hopper and mixing pump

Mud Agitators and feeding and transfer pumps will be located per needed and per payout.
Third pass to forth via liquid level height.

GN Solids Control is a professional manufacturer to make different sizes Solids Removal Variable Speed Centrifuge includes stand, feed pump and connecting hoses, and other processing equipment and accessory processing equipment before and after decanter centrifuge.

GN Solids Control makes Variable speed from 0 up to 4,000 RPM per different models. GN Solids Control is capacity to make both VFD control decanter centrifuge and full hydraulic drive (FHD) decanter centrifuge per meet clients’ request.
GN Solids Control brand decanter centrifuge is designed with high G-force to get a better separation performance.

GN Solids Control has big bowl decanter centrifuge vary from 18 inch to 22 inch, and max. to 30 inch for big fluid processing rate. In the world, few companies have the capability to make big bowl decanter centrifuge up to 30 inch. GN Solids Control is one of them who have the abilities.
GNLW553 VFD decanter centrifuge is a 22 inch bowl decanter.
GNLW453 VFD decanter centrifuge is a 18 inch decanter.
GNLW363 VFD decanter centrifuge is a 14 inch decanter.
Roughly, for the same conditions, 1 set 22inch decanter = 2 x 14 inch decanter centrifuge.

And 1 set 18 inch decanter = 1.4 x 14 inch decanter. The operators cannot expect to use an 18 inch decanter centrifuge to replace 2 x 14 inch decanter or to replace a 22 inch decanter.

GN Solids Control 14 inch, 18 inch and 22 inch decanter centrifuge can all be used for heavy mud solids control. And also some clients want to use the decanter centrifuge for different applications like for barite recovery, HGS (high gravity solids), LGS (low gravity solids), waste management, and dewatering treatment, or other different applications, the centrifuge features are not all the same. When GN Solids Control makes the design for standard models, GN Solids Control need to balance the performance for all the situations. If clients have fixed applications with the centrifuge, suggest clients to share the information to GN Solids Control sales engineer before order to get and best solution to suit for the projects and maximized the separation performance.

 

GN Solids Control is a professional manufacturer for desanding plant, slurry separation system, and mixing tank system for trenchless machine, like for HDD, TBM, piling, tunneling, water well drilling, etc…

GN Solids Control makes different sizes desanding plant and slurry separation system. For the popular separation system models, GN Solids Control keeps stock for fast delivery.

GN Solids Control desanding plant and slurry separation system includes but not limited to below models based on the treating capacity:

1. GNMS-500D desanding plant. Its handling capacity is 120 m³/h (500GPM).
1. GNMS-1000D desanding plant. Its handling capacity is 240 m³/h (1000GPM).
3. GNTBM-240 (240m3/h)
4. GNTBM-360 (360m3/h)
5. GNTBM-500 (500m3/h)
6. GNTBM-800 (800m3/h): it is combined of a GNTBM-360 and a GNTBM500 slurry separation system
7. GNTBM-1000 (1000m3/h): it is combined of a GNTBM500 and a GNTBM500 slurry separation system
8. GNTBM-1500(1500m3/h): it is combined of 3 sets of GNTBM500
9. GNTBM-2000(2000m3/h): it is combined of 4 sets of GNTBM500
10. GNTBM-2500(2500m3/h): it is combined of a 5 sets of GNTBM500
11. GNTBM-3000(3000m3/h): it is combined of a 6 sets of GNTBM500

In some cases, if the job site country does not have strict request for waste water discharge and for environment protection, clients do not use separation system trenchless machines. They only use mud mixing tank system. GN Solids Control makes different sizes compact design mixing tank system for different trenchless machine:

1. GNMX-05A: usable capacity of the mixing tank system is 5m3 / h; a hopper and a 11KW centrifugal pump is used in the system for mixing. There is a T-pipe at the outlet pipe of mixing pump. In this case, the mixing pump can also be used as transfer pump to feed mud from mixing tank to HDD or trenchless machine

2. GNMX-10A: usable capacity of the mixing tank system is 10m3 / h; a hopper and a 22KW centrifugal pump is used in the system for mixing. There is a T-pipe at the outlet pipe of mixing pump. In this case, the mixing pump can also be used as transfer pump to feed mud from mixing tank to HDD or trenchless machine

3. GNMX-15A: usable capacity of the mixing tank system is 15m3 / h; a hopper and a 30KW centrifugal pump is used in the system for mixing. There is a T-pipe at the outlet pipe of mixing pump. In this case, the mixing pump can also be used as transfer pump to feed mud from mixing tank to HDD or trenchless machine

4. GNMX-20A: usable capacity of the mixing tank system is 20m3 / h; a hopper and a 37KW centrifugal pump is used in the system for mixing. There is a T-pipe at the outlet pipe of mixing pump. In this case, the mixing pump can also be used as transfer pump to feed mud from mixing tank to HDD or trenchless machine

screw conveyor is the most popular transfer device for drilling cuttings transfer at oil and gas drilling rigs. There are many types of screw conveyor, but U- type is most common type for oil and gas drillings application. GN Solids Control can make fixed speed screw conveyor and manual adjustable speed screw conveyor.

Furthermore, GN Solids Control can also make VFD control panel for fixed speed screw conveyor. The explosion proof standard can be fully CNEX, IECEx or ATEX Zone 1 and Zone 2 Rated and suits for 460V/60HZ 3 Phase, 480V/60HZ 3 Phase, 380V/HZ 3 Phase, or suits for customized power system. Clients confirm voltage and HZ before order.

GN Solids Control makes screw conveyor with auger diameter vary from 10 inch to 18 inch (10 inch, 12 inch, 14 inch, 16 inch and 18 inch). And the screw conveyor length can vary from 12 ft to 48ft (12 ft, 24 ft, 36 ft and 48 ft) as standard model. Each auger are combined with standard length of 12ft per section. For other customized diameter and transfer length, clients can contact GN Solids Control for customization.

As screw conveyor is rotation equipment, there must be necessary safety protections to meet HSE standard and to protect job site operators.

Firstly, the top of screw conveyor will be covered and sealed by metal plate or by gratings. From one hand, it can prevent big matters fall down inside the screw conveyor which may broke the auger impellers. Secondly, it can protect people figure or foot from touch the screw conveyor while the auger rotation.

Secondly, GN Solids Control can equip Safety Grab Wires all long the auger length and ESD Devices (emergency stop device) to start and stop the control panel in case of emergency.

GN Solids Contol can offer Audio / visual alarm system on auger control panel which will be automatically activated once the power is switched on followed by the actual auger startup with a safety delay time. Audio / visual alarm system to be in the OFF mode after some time once the auger starts operation.

 

5 sets of high speed big bowl decanter centrifuge start to service at a power plant for dewatering application. The model of the 5 sets big bowl decanter centrifuge for dewatering is GNLW454E. It is a 18 inch big bowl decanter centrifuge specialled designed for waste water treatment.

Compared with normal big bowl decanter centrifuge, GNLW454E has a bigger ratio of bowl diameter and bowl length. The ratio is up to 4. It means the slurry will go through a longer separation path while going through the bowl. So the liquid can will be clean while be discharged, and the solids phase will be more drier.

The working principle of the decanter centrifuge is as follows: the decanter centrifuge bowl and the screw conveyor rotate at the same direction and at high speed. But the rotating speed of bowl and screw conveyor is not the same. In this case, there will be a certain differential speed between centrifuge bowl and screw propeller. And the differential speed is at the same direction with centrifuge bowl and screw impeller rotation.

The material is continuously introduced into the inner cylinder of the screw conveyor through the feed pipe, and enters the bowl after acceleration. The lighter liquid phase forms an inner liquid ring, which overflows the bowl continuously from the large-end overflow port of the bowl, and is discharged, out of the bowl through the liquid discharge port at another end.

Besides GNLW454E 18 inch decanter centrifuge, GN Solids Control also has other sides centrifuge models for various applications.

9 inch decanter centrifuge: GNLW223, GNLW224 series
14 inch decanter centrifuge: GNLW363, GNLW364 series
18 inch decanter centrifuge: GNLW452, GNLW453, GNLW454 series
22 inch decanter centrifuge: GNLW553 series
30 inch decanter centrifuge: GNLW764 series
Besides decanter centrifuge, GN Solids Control makes dewatering unit, oil water separator, shale shaker, mud cleaner, and other separation equipment.

GN Solids Control can design and make waste water treatment systems. Oil water separator unit can be used together with inclined plate clarifier. The function is to settle down small content of soil and sands, separate oil and water for recycling and reuse. It can be used to replace skimmer on the oil field.

For example, GN oil water separators can “Run-off” water from the rig activities is directed by the rig drains and collected in the concrete pit under shale shaker. The contaminated water generated from the activities is then pumped into the skimmer tank or inclined plate clarifier (ICP) by using the vacuum sludge pump or diaphragm pump to facilitate the separation process by gravity between the water and any free oil contaminate.

There are many inclined plates inside the inclined plate clarifier (ICP) which increase the settlement area, accelerate the settle down of soil inside the oil slurry mixture liquid, and increase the waste water discharge capacity. Liquid will flow to oil water separator device next to the ICP for getting oil and water. There is a small auger and a small diaphragm pump underneath the inclined plate clarifier (ICP) to clean out the settle down soil at the tank bottom periodically.

Once the process has been completed, the oil is transferred to the oil tank in the oil water separator skid, likewise for the clean water which goes to water tank on the same skid; the separated oil and water are then pumped into the other oil or water tanks at rig sites or at job sites. There are level gauge with its control on oil tank and water tank for high / low level control. When the level is high, the gauge control will start the pump to transfer the oil / water outside. When the level is low, the gauge control will stop the pump.

The capacity of GN waste water treatment unit is 50 m3 per hour.
Finally, the water and oil are ready to be reused back into the mud and rig operations (cleaning, dilution, mixing, etc)