drilling mud centrifuge

GN Solids Control finished the final inspection and assembly of 5 packages of solids control equipment. They will be equipped for 5 sets new 2000 HP deep oil drilling rigs. The solids control equipment will be shipped to the client soon to commission together with their new drilling rigs.

All the equipment are customized for an old client from Nigeria. Since the first time they bought from GN Solids Control in 2012, till now, they deal with GN Solids Control over 10 years. And up to now, the all their deep drilling rigs are all running with GN Solids Control equipment for drilling mud and drilling cuttings treatment. For each 2000HP deep drilling rig, the client uses a fixed speed decanter and a VFD centrifuge for drilling mud treatment. And a vertical cuttings dryer for drilling cuttings treatment, and other accessories equipment.

The 5 packages solids control equipment include following items:

1) 5 sets fixed speed decanter centrifuge. Each fixed speed centrifuge will come together with another set of pulley and belt. While changing the pulley and belt, clients can run the centrifuge at another fixed speed. Normally GN Solids Control offer 3200 RPM and 2700RPM pulley and belt for high speed decanter centrifuge. Clients can contact GN Solids Control in case they need other speeds.

2) 5 sets VFD centrifuge. The VFD panel are equipped with Air conditioner cooling system for high ambient areas. And there are 3 VFD control inside the VFD control panel for variable speed control on main drive motor, back drive motor, as well as pump motor.

3) 5 sets vertical cuttings dryer for oil base mud treatment.

4) 40 sets screw conveyors. It is 10 inch diameter augers to fit for drilling mud solids control equipment and drilling waste management equipment.

5) Various screw pump to feed for decanter centrifuges and as flush pump for vertical cuttings dryers.

6) All above equipment will come together with relative control panels.

Last week, GN Solids Control finished a set of decanter centrifuge and sludge & solids vacuum pump for an Environmental Solution Company.

The centrifuge is a 2-phase decanter centrifuge which can be used for separation oily sludge and non-oily sludge.
When the material feed to decanter centrifuge, the solids particles should be separated by GN Solids Shale Shaker to achieve correct particle size. Suitable API screen size should be chosen during the separation to achieve the separation result.

And the solids content before enter into decanter centrifuge should be less than 15%. It can be achieved by heating and dilution during pre-mixing stage. GN Solids Control can offer the pre-mixing tank which is equipped with heating pipes, agitators, slurry transfer pump and electrical control system for dilution and mixing. Operators can also prepare it at jobsite.
And plus, the Solid material density inside the oily sludge should be higher than liquid material. In this situation, after heating and flocculation, the solid phase can settle naturally or can be separated by lab tube centrifuge.

The output after 2-phase decanter centrifuge is solids phase and oil & water & soil mixture. So after 2-phase decanter centrifuge, 3-phase decanter centrifuge or disc centrifuge can be used to further clean the water, oil and soil.

The vacuum pump has a wide range application at waste management jobsite. The pump can suck slurry and feed the system. GN Solids Control vacuum pump can be used for liquid, solids and sludge transfer. The vacuum pump model used for the environmental solution company is a small size model GNSP-10, it is the smallest size vacuum pump made by GN Solids Control. GN Solids Control can offer another set of suction pipe and ahead, so this case, the mini vacuum pump can be used as an industry vacuum cleaner to clean the spilled mud on mud tanks or on the ground.

GN Solids Control makes various sizes and various standards centrifuges to meet for oil and gas drilling, no-oil drilling mud treatment, as well as industry waste separation.

In many cases, clients contact GN Solids Control sales team to ask for prices of GN centrifuges. They said their choice of centrifuge will depend on the characteristics and the price for this they want GN Solids Control to send them a draft quotation for all types of centrifuges.

Actually, it is impossible to quote prices if without the details information of the project or clients request on the separation centrifuges. Some of the reasons are that, GN Solids Control makes various types decanter centrifuge for oil gas drilling, slurry separation and industry separation.

GN Solids Control need the project information and clients’ request on the decanter centrifuge, then GN sales engineer can recommend clients suitable model with necessary standards.

Prices cannot be quoted without project information. As even for the same centrifuge model, price will vary much for different standard while treating different materials, like for the VFD centrifuges, for a same model, there are Explosion proof zone 1 and zone 2 for hazardous areas, there are CNEX, ATEX, and IECEX explosion proof standard for various market request. For the positive pressurized VFD control panel, there are 3 VFD or 2 VFD control panel per different field request. There are vortex tube cooking system and air conditioner cooling type VFD panel to suit for different ambient areas.
You can visit our website for information. And also there are non-explosion proof decanter and VFD panel for safety areas. Clients can choose the suitable standard based on his job site situation and his budget.

GN Solids Control website show some general centrifuge models for clients’ information.
https://www.gnsolidscontrol.com/decanting-centrifuge 

https://www.gnsolidscontrol.com/industry-centrifuges 

Below are some general questions about centrifuge separation, but not limited to below:

1) Before entering into decanter centrifuge, where is the material coming from, and what treatment it have been down?

2) what is the solids & liquid percentage, and max. particle size before enter into centrifuge?

3) What kind of solids and liquid output you want to reach after centrifuge separation?

4) Handling capacity of centrifuge you want to reach?

and other information you can offer.

GN Solids Control high speed decanter centrifuge is widely used for low gravity drilling mud solids control (LGS). The most popular size decanter centrifuge for drilling mud solids control system is 14 inch bowl.

There are mainly 3 applications of decanter centrifuges using in drilling mud solids control system.

Firstly, middle speed decanter centrifuge is used in drilling mud solids control system for HGS (High Gravity Solids).

Secondly, high speed decanter centrifuge are used to treat low gravity solids (LGS) removal.

The high speed decanter centrifuge and low speed decanter centrifuge are fixed speed control. GN Solids Control also make variable speed control decanter centrifuge which can fix for both high gravity solids removal and low gravity solids removal. Besides drilling mud solids control, GN Solids Control decanter centrifuge can also used for drilling waste management.

GN Solids Control decanter centrifuge standard color is green RAL6024. GN Solids Control can also make customized color per clients’ request. And GN Solids Control can put clients’ logo on equipment if they need.

Besides 14 inch decanter centrifuge, GN Solids Control makes other sides decanter centrifuge, includes but not limited to below models:

1. GN Solids Control makes 9 inch decanter centrifuge which are widely used in mining slurry separation. It is used together with mini size shale shaker and mixing hopper to complete as a solids removal unit (SRU).

2. GN Solids Control makes 18 inch and 22 inch decanter centrifuge for fine solids separation and dewatering treatment.

3. GN Solids Control makes the biggest size 30 inch decanter centrifuge for industry separation.

Besides various sides decanter centrifuge, GN Solids Control makes other liquid and solids separation equipment to offer turn-key solution to clients.

The major liquid and solids separation equipment GN Solids Control can offer: shale shaker, mud cleaner, desander, desilter, decanter centrifuge, mud agitator, …

Some transferring equipment GN Solids Control make: vertical slurry pump, centrifugal pump, screw conveyor, solids and vacuum transfer pump, …

Complete mud system GN Solids Control makes: various sizes solids removal unit and mud recycling system for various kinds of drilling activities, like for HDD, CBM, piling, pipe-jacking, etc…

Quantity 2 decanter centrifuges is under assembly and do factory testing in GN workshop. Both the 2 centrifuges are 14 inch bowl size. It is the most popular centrifuge size for oil and gas drilling mud treatment. GN Solids Control can make customized color and logo for GN centrifuges and other equipment. The 2 centrifuges are make per clients’ request for Middle East.

The quantity 2 decanter centrifuge are equipped with positive pressurized VFD control panel. The VFD panels are with installed with explosion proof air conditioner for self-cooling. Both the decanter centrifuge and VFD panel are complied with Europe ATEX Standard Explosion Proof to suit for 55C degree ambient.

Below are some basic principles of drilling fluid treatment decanter centrifuge operation:
1. Do not start the centrifuge without belt shield;
2. To ensure trouble free operation, first rotate the centrifuge bowl by hand before power the centrifuge;
3. If there is abnormal noise or vibration, do not continue to use. Stop the machine soon for trouble shooting.
4. Before feeding drilling fluid into centrifuge, make sure the centrifuge reach the specified speed.
5. Do not overfeed the centrifuge to avoid overload.

GN Solids Control can make heavy duty telescopic skid for all size GN centrifuges. During jobsite operation, the feeding pump, VFD control panel, pipelines and cables are all installed on the skid for easy layout.

GN Solids Control offer German brand NETZSCH pump to feed for GN decanter centrifuges. The rotor and stator are made in German. The whole pump assembled in China.

Besides screw pump, GN Solids Control makes other transfer devices for oil and gas drilling field.
1. GN Solids Control can make various sizes centrifugal pump for drilling mud transfer.
2. GN Solids Control can make vacuum pump for solids and sludge transfer. Compared with normal transfer pump, GN vacuum pump can allow high solids content and bigger size solids. The discharge distance of GN vacuum pump can up to 500m or 1000m based on the models.
If you are interested in any equipment, welcome you contact GN Solids Control freely.

GN Solids Control offers 2-phase separation and 3-phase separation on OBM and oil sludge treatment solution. Vertical cuttings dryer, high G drying shaker, 2 phase decanter centrifuge, 3 phase decanter centrifuge, 3 phase disc centrifuge are the major separation equipment used for the process. Job site operators can choose the suitable separation device to suit for the material situation and clients’ separation demands.

Chemical dosing unit is a necessary device to use together with the separation device. GN Solids Control has various sizes and various type of chemical dosing unit for liquid chemicals and powder chemicals.

For recover the usable drilling mud from OBM cuttings and WBM cuttings, major separation equipment is vertical cuttings dryer, high G drying shale shaker, and decanter centrifuge. The separation equipment can be laid on the same skid for compact design. Or vertical cuttings dryer / high G drying shale shaker and decanter centrifuge are put on different skids for flexible layout and easy movement.

Many clients want to know more and understand better of the equipment to treat OBM and WBM, all (vertical cuttings dryer, Decanter centrifuge, Screw Conveyor) are necessary to effectively treat oil base mud cuttings, and High G dryer, decanter centrifuge to effectively treat water base mud cuttings.

A client contacted GN Solids Control, they would like for package Solution to be installed next to concrete oil base mud tanks that they will build on their yard in order for OBM to be pulled directly from tanks to treatment solution. GN Solids Control can design layout of this all process to meet for clients’ request.

Regarding Decanter centrifuge, GN Solids Control can make 2-phase decanter centrifuge to separate liquids and solids phase. GN Solids Control is also capacity to make 3-phase decanter centrifuge which is able to separate Oil, Water and Solids. The tricanter centrifuge can help to extract and recover the oil from the mud.

Centrifugal separation is the process of separating heterogeneous mixtures such as liquid – solid, liquid – liquid – solid and liquid – liquid by centrifugal force. The process is divided into three types: centrifugal filtration, centrifugal sedimentation and centrifugal separation. The corresponding centrifuges are also divided into three categories: filtration centrifuges, sedimentation centrifuges and centrifugal separators.

Decanter centrifuge is widely used in oil field to treat drilling mud, drilling cuttings, and oil sludge and waste water generated from the drilling activities.

GN Solids Control makes various sizes of 2-phase decanter centrifuge, 3-phase decanter centrifuge, vertical centrifuge (normally called as vertical cuttings dryer), and disc centrifuge. GN Solids Control is capable to make explosion proof centrifuge to suit for hazardous environment, and non-explosion proof centrifuges for safety areas.

According to clients request and the application requirements on rotating speed and conveyor speed, GN Solids Control can make fixed speed control centrifuge, variable frequency control (VFD) control centrifuge, and full hydraulic drive (FHD) centrifuges.

Below are the major components of decanter centrifuge:
The rotating assembly:
The rotating assembly consists of a cylindrical stainless steel bowl, conveyor assembly, and related components. The bowl has openings at both ends: A conical head at the solid discharge end and a flat liquid bowl head at the opposite end. The bowl ends are supported by greased ball bearings.

The bowl assembly:
The bowl assembly consists of a cylindrical bowl closed on one end by the liquid bowl head and at the other by the solid bowl head.

Screw Propeller or the conveyor assembly:
The conveyor assembly is a hollow, cylindrical auger that receives the inlet slurry into its interior, disperses it through nozzles to the bowl assembly, and transports the solids to the solid discharge
outlet.

Besides centrifuge, GN Solids Control make other separation equipment to treat drilling mud and drilling cuttings, like shale shaker, high G drying shaker, desander, desilter, mud cleaner, etc…

GN Solids Control makes various sizes of oil sludge separation system. GN Solids Control is capable to make and offer the full package separation solution on various types of oil sludge. Double deck shale shkaer, decanter centrifuge and disc centrifuge are the major separation equipment used in oil sludge separation system.

Many clients are not familiar with disc centrifuge. Below is a detailed introduction of the disc centrifuge.

Disc centrifuge is a kind of sedimentation centrifuge, which is used to separate difficult materials, such as suspension composed of viscous liquid and fine solid particles, or emulsion composed of liquid with similar density, etc. Disc centrifuge is one of the most widely used sedimentation centrifuges.

Disc centrifuge is mainly used for 2 applications:

1) Liquid – solid separation (i.e. separation of bottom concentration suspension), it is also called clarification operation; It can be used to treat waste water or waste slurry, and recover liquid from waste slurry.

2) Liquid – liquid separation (or liquid-liquid-solid) separation (i.e. separation of emulsion). It is called as separation operation. It is widely used in oil sludge treatment system. Disc centrifuge is equipped after 2-phase decanter centrifuge. After disc centrifuge, operators can get oil, water and soil. It is liquid – liquid – solids separation.

The disc separator is a kind of vertical centrifuge. The drum is installed on the upper end of the vertical shaft and rotates at high speed driven by the motor through the transmission device. There is a group of disc-shaped parts – discs which are nested and stacked with each other in the drum. There is a small gap between discs.

The suspension (or emulsion) is fed to the drum through the feed pipe located in the center of the drum. When the waste slurry or oil sludge (or emulsion) flows through the gap between the discs, solid particles (or droplets) settle on the discs under the action of a centrifuge to form a sediment (or liquid layer). The sediment slides along the surface of the disc and separates from the disc and accumulates at the position with the largest inner diameter of the drum.

The separated liquid is discharged from the outlet of the drum. The function of the disc is to shorten the settling distance of solid particles (or droplets) and expand the settling area of the drum. Due to the installation of the disc in the drum, the production capacity of the separator is greatly improved. The solid accumulated in the drum shall be removed manually after the separator is shut down, or discharged from the drum without shutdown through the slag discharge mechanism.

Some sets of drilling mud solids control decanter centrifuge and drilling waste vertical cuttings dryer are ready. They are customized for an international drilling company. It is not the 1st time the client buy from us. All their drilling rigs are equipped with GN Solids Control drilling waste management equipment. There is a fixed speed decanter centrifuge, a VFD decanter centrifuge and a vertical cuttings dryer for a drilling rig for drilling mud and drilling cuttings treatment.

There are fixed speed decanter centrifuges, Variable frequency speed decanter centrifuges included in the project. Even for the fixed speed decanter centrifuge, GN Solids Control can offer another set of pulley and belt for another fixed speed control.

GN Solids Control offer German brand NETZSCH pump as feeding pump for decanter centrifuges. The feeding pump screw pump control is inside the decanter centrifuge control panel. There are interlock between decanter centrifuge main motor and back drive motor, and the pump motor. As the 3 motors must be started and stopped in order. It is to protect decanter centrifuge from overload. With the interlock control the feeding pump can be stopped automatically in case of too much mud feeding.

There is a lubricating oil system for the vertical cuttings dryer. The lubricating system must be started before the vertical cuttings dryer main motor start running. The oil system drive pump motor is included in the vertical cuttings dryer control panel to start oil pump for some minutes and then to start the main motor. GN Solids Control offers German brand NETZSCH pump as flush pump for vertical cuttings dryer. Screw pump flush pump control is included inside the vertical cuttings dryer control panel.

GN Solids Control offers telescopic skid for decanter centrifuges, VFD control panel and screw pump are mounted on the skid. GN Solids Control offers heavy duty skid for vertical cuttings dryer. Screw conveyors are used together with decanter centrifuges and vertical cuttings dryer to transfer drill cuttings.

VFD centrifuge and FHD centrifuge is widely used for drilling mud system. It can be used for drilling mud treatment, drilling cutting treatment, waste water treatment, and oil sludge separation.

As FHD centrifuge price is high. And the FHD system is normally complex for maintenance and repair. As this reason, VFD centrifuge is more popular than FHD centrifuge. GN Solids Control is a professional manufacturer for VFD decanter centrifuge. Other companies normally make VFD control panel with fan for cooling. It is not suitable for high temperature area. And it is not self cooling. GN Solids Control is capable to make positive pressurized VFD control panel, which can be equipped with A/C cooling system or vortex tube cooling system. It is GN special design. Both A/C and vortex tube system are for self-cooling. They can capable for high temperature area.

Many clients do not know the difference between Vortex cooling system and A/C cooling system for the centrifuge positive pressured VFD panel. Here is a general introduction of the difference difference between Vortex cooling system and A/C cooling system for the VFD

1) Positive pressured VFD panel with vortex cooling system is for CNEX Zone 2.
The video will make you clear about Vortex tube cooling system.
https://www.youtube.com/watch?v=DevBGnT2xhI&ab_channel=StreamtekCorp

2) Positive pressured VFD panel with A/C cooling system is for ATEX Zone 1.
The A/C used for VFD panels looks the same as the AC we used for rooms and office, but explosion proof and suits for +55C degree. The cooling performance is better than vortex tube. Price is higher. It is specially used for high temperature areas.

With neither Vortex tube or A/C self cooling system, they can keep the internal of VFD panel around 25C degree.It is the most suitable temperature for electric components. The temperature can protect electric components and extend their lifetime.