GN Oil Sludge Treatment System is to use chemical to wash the oil sludge with heat to temperature of 60-70 C degree. After washing, the waste oil slurry is pumped to GN separation equipment to separate into oil, water and solids. The recycled water can be reused in the washing process, and the oil is clean enough to sell to the refinery company, the solids contain less than 2% oil which can be sent to biodegradation or thermal unit for final disposal if needed.

Below are some important points operators need to pay attention to while using GN oil sludge treatment system.

1. During shale shaker separation, clients should choose fine screens to remove particles up to 500 microns. It means all particles above 500 microns must be removed. It is to protection the centrifuges after shale shaker separation.

2. As disc centrifuge is easy to be blocked, the waste slurry enter into disc centrifuge must with solids less than 200 microns, and with less solids content. In this reason, 2-phase decanter centrifuge is used before disc centrifuge to further remove solids and reduce the solids content.

Why disc entrifuge is easy to be blocked, but clients still prefer to use it for water treatment and oil sludge treatment?

The reason is that, the clearance between the discs of the disc centrifuge is very small, which ensures that the separation is fine, and the solid particles can also be separated, so as to obtain a clearer liquid phase, which is the advantage of the disc centrifuge compared with other types of centrifuges, like decanter centrifuge.

However, the small disc gap requires more frequent manual cleaning and slag removal. If the manual cleaning and flushing of the flushing pump are not timely, the disc centrifuge is easy to be blocked during operation. This is the major disadvantages of the disc player. Operators can compare the advantages and disadvantages and make their decision to suit their job site situation.

3. The oil content in the solids which is discharged from decanter centrifuge is 1 ~ 3%.

4.15m3/h oil sludge treatment system adapts double deck shale shaker. The upper deck use steel frame screens with bigger opens. The bottom deck use fine API screen, API 40 is recommended for the bottom deck.

5. The oil content in the recovered water which is discharged from disc centrifuge is 1000 – 3000ppm. If clients want more clean water with less oil and soil, clients can add a water treatment unit after GN oil sludge separation system.

Centrifugal mud pump and decanter centrifuge is widely used at drilling rig job site. The centrifugal pump and oilfield centrifuge can be used in drilling mud solids control system and drilling waste management system.
Last week, GN Solids Control finished a batch of centrifugal pump pump and oil field centrifuge. The pumps and centrifuges will be shipped to an international drilling company.

There are 2 sets high speed decanter centrifuge included in the project. The centrifuge model is GNLW363CG. It is a 14 inch bowl size 2-phase separation decanter centrifuge. GNLW363CG decanter centrifuge is most popular used in oil and gas drilling mud systems. The 14 inch decanter centrifuge can adapt middle speed for barite recovery, or high speed for fine solids separation and dewatering treatment. Beside fixed speed decanter centrifuge, GN Solids Control can also offer VFD control decanter centrifuge and FHD centrifuge.

Except for 14 inch decanter centrifuge, GN Solids Control is capable to make mini size centrifuge 9 inch, big size centrifuge 18 inch, 22 inch, and huge size centrifuge 30 inch. Few company have the capability to make 30 inch huge size centrifuge, GN Solids Control is among the few manufacturers.

GN Solids Control makes various sizes centrifugal pump for various applications. Clients choose the right model based on their material type, and their demands on transfer distance, flow capacity, lifting head, and so on. In this project, the client choose 3 different models of centrifugal pump. The pumps will be used for trip tanks, for water tank, for pill tank, for mud mixing tanks, and for suction tank.
1)4 no. of GNSB4x3C-11J oil field centrifugal pump
2)6 no. of GNSB6x5C-13J oil field centrifugal pump
3)6 no. of GNSB8x6C-14J oil field centrifugal pump

Besides centrifugal pump and decanter centrifuge, GN Solids Control makes full line drilling mud solids control equipment and drilling waste management equipment, some equipment like shale shaker, mud cleaner, desander, desilter, mud mixer, mixing hopper, shearing hopper, vertical cuttings dryer, screw conveyor, dewatering unit, etc…

GN Solids Control makes various size of decanter centrifuge and screw conveyors for drilling mud treatment and drilling waste cutting transfer. GN Solids Control finished some decanter centrifuges, vertical cuttings dryer, and some screw conveyors for an international drilling company.

Decanter centrifuge is the most popular separation equipment for liquid and solids separation. High speed and low speed decanter centrifuge can be used to treat drilling mud and drilling cuttings. Decanter centrifuge can be used for slurry treatment and waste water treatment. Decanter centrifuge can also be used together with chemical dosing unit for dewatering treatment.

Drilling fluid decanter centrifuge is an important solid control equipment for drilling mud separation system. It can separate solids greater than 2 microns, which can effectively solve the problem that other drilling mud separation equipment can not separate, and remove the ultra-fine harmful solid phase after shale shaker, desander and desilter mud cleaner separation.

If define from bowl size, GN Solids Control makes various sizes of decanter centrifuge, from mini size 9 inch, to middle size 14 inch, 18 inch, and big bowl size 22 inch and 30 inch. GN Solids Control makes fixed speed decanter centrifuge, VFD control centrifuge and FHD centrifuge.

Screw conveyor is a transfer machinery which uses motor to drive screw rotation and push materials to achieve the purpose of conveying. Screw conveyor can be located at job site horizontally, inclined or vertically, it has the advantages of simple structure, small cross-sectional area, good sealing, convenient operation, easy maintenance, convenient closed transportation and so on.

Screw conveyor can be divided into two types: axial screw conveyor and shaftless screw conveyor. In appearance, it can be divided into U-shaped screw conveyor and tubular screw conveyor. Screw conveyor is widely used at drilling rig job site, especially the U-shaped screw conveyor is widely used to transfer drilling cuttings and other drilling waste materials.

GN Solids Control major products is to make full package drilling cuttings and drilling waste management equipment. GN Solids Control is capacity to make drilling mud solids control and drilling cuttings treatment equipment to fit for clients’ job site situation.

Before the end of the last month 2021, GN Solids Control shipped a cuttings dryer package for an Africa client. The cuttings dryer package will be used to treat the drilling cuttings generated from drilling mud solids control system. Below are the major processing equipment included in the cuttings dryer package.

1) There is Qty 1 vertical cuttings dryer in the cutting drying package. Vertical cuttings dryer is used before decanter centrifuge. It is used to reduce the OOC in the OBM cuttings and to recover usable drilling fluids. Normally, GN Solids Control use 4kw screw pump as flush pump for vertical cuttings dryer. Sometimes, clients use 7.5kw screw pump as flush pump in order to interchangeable with centrifuge feeding pump. GN Solids Control can offer flush pump electrical control inside the vertical cuttings dryer control panel.

2) There are Qty 4 fixed speed decanter centrifuge with high speed and lower speed for drilling mud treatment. It is the most hot sale centrifuge model from GN Solids Control: GNLW363CG. 5.5kw and 7.5kw screw pump is recommended to feed for the centrifuge. The electrical control of the feeding pump is inside the centrifuge control panel. As there must be interlock system between centrifuge and feeding pump to protect the centrifuge from overload.

3) Screw conveyor is a popular transfer equipment used at oil and gas drilling job site. It is widely used to collect drilling cuttings from solids control shaler shaker and mud cleaner. And than feed to other cuttings drying equipment. GN Solids Control makes various size screw conveyor, the auger diameter is 10 inch, 12 inch, 14 inch, and 18 inch. GN Solids Control offers fixed speed screw conveyor and variable speed screw conveyor for optional.

Through some months tough manufacturing, GN Solids Control finished a 56,000 bbl liquid mud plant. It is the largest liquid mud plant designed and made by GN Solids Control. The 56,000 liquid mud plant will be shipped to an international drilling fluids service company.

The liquid mud plant includes mud treatment modular, mud mixing modular and mud storage modular. The 56,000 liquid mud plant includes below modular:

1. Drilling mud treatment modular with horizontal mud tank: it includes 1 qty of drilling mud shale shaker, the model is GNZS594F. It is a 4-panel linear motion shale shaker to treat the drilling mud. 1 qty of middle speed decanter centrifuge, the model is GNLW452D. The middle speed decanter centrifuge is used to recover batonite. Besides the middle speed centrifuge, there is a high speed centrifuge GNLW363C. The high speed decanter centrifuge is used to recover fine solids and reduce mud weight. Operators can choose to use neither one of the centrifuge, or use both centrifuge.

2.Mud mixing modular with horizontal mud tanks: mud mixing pump 4 ea, mud mixing hopper 4 ea. The mixing pump type used in the liquid mud plant is centrifugal pump with dual sealing system. Besides mud mixing, centrifugal pump can also be used for mud feeding, for mud pump supercharge, for mud transfer and etc…

3.Vertical tanks for mud mixing: There are qty 70 vertical mud tanks with volume 500bbls (80m³). It is a hugh work to build such big qty big tanks.

Besides liquid mud plant, GN big advantage is to make drilling mud treatment system for oil and gas drilling, slurry treatment system and desandling plant for non-oil drilling mud, like water well drilling, piling, trenchless, CBM, micro tunneling, etc…). And GN major products is to make oil sludge treatment system, waste water treatment system, and other liquid and solids separation applications.

A set of Dewatering decanter Centrifuge, a Screw Press Dewatering Machine, and a Chemical Dosing Unit is designed and made for an environmental Company. The dewatering treatment will be used to treat waste slurry generated from industries.

The decanter centrifuge is a 2-phase centrifuge for liquid and solids separation. The chemical dosing system is a 3-compartment chemical dosing unit for automatic chemical mixing and dosing. There are agitators equipped on each tank compartment. It is mainly used for powder chemical mixing and dosing. Mostly, the powder chemical cannot be used immediately once it is mixed. As this reason, the 1st compartment is used to mixing chemicals. The 2nd compartment is waiting for use, normally, it takes around 20 ~ 30 minutes. After the chemical mixture is ready for use, it will flow to the 3rd compartment. There are chemical dosing pump equipped on the 3rd tank compartment. The ready chemical mixture will be feeding to decanter centrifuge.

The equipped used for this project is a 14 inch decanter centrifuge. Besides 14 inch decanter centrifuge, GN Solids Control can also make other big bowl size and small bowl size decanter centrifuge, like 9 inch, 18 inch, 22 inch and the big bowl up to 30 inch.

Besides the 3-compartment automatic chemical dosing unit, GN Solids Control also make various sizes of chemical dosing units for liquid chemical mixing and dosing.

There are normally 3 types of chemicals used for waste slurry treatment which is with oil. The operators choose the right types based on the sludge material situation.
1) Sludge separating agent or surfactant: It is mainly used for oil sludge separation. It can improve the separation performance of the oil sludge
2) Demulsifier: remove the oil and water in the emulsified oil-water mixture
3) Flocculant (PAM) or coagulant (PAC) : for ultra fine solids separation.It can be used for both oil sludge with oil and without oil. If the operators already dosed demulsifier, they should consider and calculate carefully to see if they need to add PAM / PAC or not. As demulsifier is to make oil, water and solids separated. But PAM / PAC is for flocculation. PAM / PAC will reduce the demuisifier performance and to make the oil, water and soil mixture again.

In some projects, acid or alkali will be dosed as the first step to balance the PH. If operators need to add acid or alkali, it is normally added before other chemical agents. The suitable PH can improve separation performance in some degree, but not much.

GN Solids Control finished some drilling rig solids control equipment for an oilfield service company. There are 4 shale shakers, 1 mud cleaner and 2 big bowl decanter centrifuges included in the shipment.

The Qty 4 shale shaker is a 4-panel linear motion single deck with composite frame pretension screens. The model of the shale shaker is GNZS594F. GNZS594 is the most popular shaker model made by GN Solids Control. GN Solids Control can offer normal linear motion GNZS594F shale shaker, as well as high G force GNZS594F-HGS for drilling waste and drilling cuttings treatment. Plus, GN Solids Control can also offer dual motion single deck shale shaker GNZS594F. Clients can communicate with GN Solids Control sales team to confirm their request before order.

The mud cleaner in the shipment is GNZJ594F-3S16N for deep drilling. There are 4 nos of 10inch desander cone and 16 nos of 4 inch desilter cones included in the mud cleaner. Total handling capacity of the mud cleaner can be up to 1500GPM. It is a 3-in-1 combo type shale shaker C/W desander cleaner and desilter cleaner. The hydrocyclone unit is fixed to shale shaker deck by bolts and nuts. It is removable. In this condition, the combo type mud cleaner is capacity to be used as a normal type shale shaker.

Decanter centrifuge included in the shipment is GNLW454ET-VFD. It is a VFD centrifuge with high G force and big bowl for waste management to remove the fine solids. The decanter centrifuge is not the popular type for drilling mud treatment. GN Solids Control makes other decanter centrifuge models for drilling mud treatment. GNLW363C and GNLW452 are the 2 most popular decanter centrifuge serials for drilling mud treatment. GN Solids Control is capacity to make fixed speed decanter centrifuge, VFD centrifuge, as well as FHD centrifuge. Plus, GN Solids Control is have full size decanter centrifuge from 9 inch bowl to 30 inch bowl to suit for various solids and liquid separations.

There are many clients inquire cuttings dryer to treat drilling waste and drilling cuttings from oil and gas drilling mud recycling system.

GN Solids Control makes 2 types of cuttings dryer separator for drilling cuttings treatment.

A type of cuttings dryer is vertical cuttings dryer (short as VCD). It is also called as vortex centrifuge, or vertical centrifuge. The GN Vertical Cutting Dryer uses centrifugal force to dry drilled solids in oil or synthetic base fluids. A stainless steel screen bowl traps “wet” solids and accelerates them up 900RPM with G force to 420G. The vertical cuttings dryer is mainly designed to treat oil based mud and oil based cuttings. After vertical cuttings dryer, the oil on the cuttings can be reduced to 3% ~ 5%.

Recently, some clients inquires GN Solids Control to ask for vertical cuttings dryer to treat the solids from decanter centrifuge. In fact, vertical cuttings dryer is not recommended to treat the solids discharge from centrifuge separators. As all centrifuges are for fine solids separation. The solids enter into centrifuge much with less 15% solids content. And the max. Particle size should be smaller than 2mm.

While the screen basket of vertical cuttings dryer screen opening is 0.5mm or 0.35mm.There are fewer solids can be removed from decanter centrifuge discharged solids.

High G dryer shaker is also called as cuttings dryer. GN High G Force Drying shaker is design for primary solids control and drying the cuttings from the primary solids control equipments, recover silts and ultra-fine sands, provide solids in a consistently stackable and conveyable form and requires no expensive chemicals or polymers. GN high G drying Shaker with Adjustable G force Up to 8.0 G. It can be used for both OBM and WBM cuttings. While used for OBM treatment, the oil on the cuttings (OOC) can be be lower as vertical cuttings dryer. But its cost is much lower than vertical cuttings dryer.

GN Solids Control can make high G drying shaker c/w a underflow catch tank.

Reference to GN Solids Control scope of supplying pumps, clients may contact GN and would like to get more information of GN Vacuum Sludge Pump: Complete technical catalog and performance capabilities, etc…

GN Solids Control has 3 models solids and sludge vacuum transfer pump: GNSP-40B, GNSP-20B, and GNSP-10B. GNSP-40B is a large model with mounting skid. GNSP-20B and GNSP-10B are portable models with tires for easy movement.

GN vacuum pump is specially designed for long distance solids and sludge transfer. In order to ensure the pump can meet clients working situation and can solve their issues, before order, GN Solids Control sales engineers will send a questions list about vacuum pump. Clients are requested to answer as more as they can to let GN know more about their jobsite and their demands. Then GN engineer will see if the pump can suit the applications.

The pump is 100% driven by air. Clients also need to pay attention on the air supply, and compare which pump model they can have qualified air supplier. Clients can feed air from rig or from other air supplier, or by separate an air compressor.

Actually, GN Solids Control usually ask two typical questions to make sure the vacuum pump is suitable to use:
1.  Where does the material originally come from? If there are big stones or aggregates, the pump will not work.
2.  What’s the height between the suction port and material? Should be within 8 meters in order to work, otherwise need to lower the pump.  But the transfer length can up to 500m or 1000m.

Except for the vacuum pump for solids and sludge transfer, GN Solids Control makes various sizes of screw conveyors for drilling cuttings transfer. And GN Solids Control make full line separation equipment for drilling waste management, oil sludge treatment and for waste slurry treatment. GN major separation equipment includes shale shaker, decanter centrifuge, disc centrifuge, vertical cuttings dryer, high G drying shale shaker.

There are many clients inquire cuttings dryer to treat drilling waste and drilling cuttings from oil and gas drilling mud recycling system. GN Solids Control makes 2 types of cuttings dryer separator for drilling cuttings treatment.

A type of cuttings dryer is vertical cuttings dryer (short as VCD). It is also called as vortex centrifuge, or vertical centrifuge. The GN Vertical Cutting Dryer uses centrifugal force to dry drilled solids in oil or synthetic base fluids. A stainless steel screen bowl traps “wet” solids and accelerates them up 900RPM with G force to 420G.

The vertical cuttings dryer is mainly designed to treat oil based mud and oil based cuttings. After vertical cuttings dryer, the oil on the cuttings can be reduced to 3% ~ 5%.

Recently, some clients inquires GN Solids Control to ask for vertical cuttings dryer to treat the solids from decanter centrifuge. In fact, vertical cuttings dryer is not recommended to treat the solids discharge from centrifuge separators. As all centrifuges are for fine solids separation. The solids enter into centrifuge much with less 15% solids content. And the max. Particle size should be smaller than 2mm. While the screen basket of vertical cuttings dryer screen opening is 0.5mm or 0.35mm.There are fewer solids can be removed from centrifuge discharged solids.

High G dryer shaker is also called as cuttings dryer. GN High G Force Drying shaker is design for primary solids control and drying the cuttings from the primary solids control equipments, recover silts and ultra-fine sands, provide solids in a consistently stackable and conveyable form and requires no expensive chemicals or polymers. GN high G drying Shaker with Adjustable G force Up to 8.0 G. It can be used for both OBM and WBM cuttings. While used for OBM treatment, the oil on the cuttings (OOC) can be be lower as vertical cuttings dryer. But its cost is much lower than vertical cuttings dryer.

GN Solids Control can make high G drying shaker c/w a underflow catch tank.