Drilling Waste Management

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 vacuum pump is mainly designed for solids and slurry transfer. With its special design, the vacuum pump can reach discharging distance up to 500m or 1000m, it’s up to the models clients choose. The big size vacuum pump can discharge to 1000m away, and the even the smallest model vacuum pump can reach up transfer distance 500m away.

Recently, GN Solids Control offered a mini size vacuum pump applied for tank cleaning works. The client will use the mini size vacuum pump to suck the waste slurry from deep tanks. The model of the mini size vacuum pump is GNSP-10B. It is the smallest size vacuum pump made by GN Solid Control. The biggest model is GNSP-10B.

After tank cleaning, the client choose a GN mini size decanter centrifuge to do the liquid and solids separation. After the separation, the client can reduce the waste liquid, recover more usable liquid and reuse the water. It is a 9 inch baby centrifuge with high speed and high G force for water treatment and slurry recover. GN Solids Control mini size centrifuge is widely used at Industry Waste Water Treatment plant and Diamond Core Drilling Fluids Treatment.

GN Solids Control major advantage is to offer full package tank cleaning treatment system and solids removal unit for mining industry, which will consist of shale shaker separator, desander / desilter, decanter centrifuge, feeding pumps, control panels, mud tanks, and skids to holding all items. Sometimes, the chemical dosing unit will be used together with centrifuge to ultra fine solids separation.

GN Solids Control sludge vacuum pump, also named as solids transfer pump. It is a pneumatic slurry transfer vacuum pump. The pump is widely used for liquid, slurry, powder and solids transfer. GN vacuum pump is a high vacuum loading solids transfer pump, so it can be used at tough environmental for solids or sludge transfer especially used to suck and transfer the high density and high viscosity oil sludge from waste pits generated by oil and gas drilling. GN vacuum pump is working with high performance and less maintenance. The pump can transfer material with high gravity and high density, with dry solids material or slurry with solids content max. up to 80%.

Recently, GN Solid Control has successfully finished a set of mini size sludge vacuum pump and mini size decanter centrifuge, they will be exported for a foreign customer. They will be used for a tank cleaning project.

The solids and sludge vacuum pump is a mini size with portable design, the model code is GNSP-10. The mini size vacuum pump is equipped with tires for easy movement. It will be used to transfer the waste slurry which is generated from tank cleaning works. And the decanter centrifuge model code is GNLW224. It is a 9 inch mini size bowl centrifuge with high speed for solid and liquid separation. GN Solids Control sludge vacuum pump and decanter centrifuge are widely used in China and outside China at various job sites. Clients are very happy with their performance.

GN Solids Control makes various sizes sludge vacuum pump for solids, sludge, powder or liquid transfer. It is a kind of vacuum pump that forms a vacuum in the tank through pneumatic, then sucks the materials, and then inflates the tank into positive pressure to discharge the materials from the tank. Because its working principle is pneumatic and no power supply is required, GN Solids Control vacuum pump can be used in explosion-proof areas and hazardous areas.

Due to the unique venturi device of GN Solids Control solid vacuum pump, it can produce a vacuum effect of 25 inches Hg (mercury column) under the condition of strong air flow, empty the air in the tank and then suck the materials, so there are almost no wear parts. It is suitable for the transportation of high-density materials and materials with solid content exceeding 80%, and its stable performance enables it to operate in the most difficult environment.

GN Solids Control 9 inch decanter centrifuge is a small bowl centrifuge, which are mainly used under the working conditions of small treatment or limited site, and are also ideal equipment for centrifuge experimental test. The mini side centrifuge is mainly used to treat the oily sludge extracted from the oil tank by the vacuum pump for solid-liquid separation. According to different customer needs, our company can also provide customers with three different control modes; Constant speed control, frequency conversion control and full hydraulic control. In addition to centrifuges, our company can also provide customers with professional chemical dosing devices, which can be used with centrifuges to obtain better solid-liquid separation effect.

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.

Screw conveyor is a popular transfer device used at oil and gas drilling site. It can collect drill cuttings from solids control equipment, like shale shaker, mud cleaner, or desander, desilter, and it can used to transfer drill cuttings to cuttings dryers, vertical cuttings dryer, cuttings box, cuttings pits, etc…

GN Solids Control makes 5 sizes auger diameter: 10 inch, 12 inch, 14 inch, 16 inch and 18 inch. GN Solids Control makes 12ft per section as standard length. Clients can choose the auger diameter and section quantity per their needs. GN Solids Control makes various sizes screw conveyor, the transfer length is from 12ft to 48ft.

The driving unit of screw conveyor is composed of helical bevel gearbox reducer, explosion proof motor, driven section, middle section, and feed section. The gearbox reducer and motor is combined by the flange.

The Augurs are sometimes inclined at an angle, particularly the Secondary Augur. Normally, the first screw conveyor is laid at shale shaker and mud cleaner in horizontal. And then there are other augers next to the horizontal auger to transfer drill cuttings to requested position. Some clients said they faced the problem that, the oil may come from gearbox reducer to motor. Clients want isolation plate between gearboxes and Electric Motors for screw conveyors electric Motors to prevent Lubricating Oil from going into the Electric Motors.

GN Solids Control provide good quality oil seal between gearbox reducer and motor to prevent oil to enter into the motor. The screw conveyor impellers are made of wear-resistant and thicker manganese steel. According to the clients’ special requirements, the screw conveyor impellers can also be sprayed with wear-resistant coating to extent the service life of the screw conveyors.

Besides screw conveyor, GN Solids Control can also offer other transfer equipment, like centrifugal pump, slurry pump, screw pump, solids and sludge vacuum pump, 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.

Decanter centrifuge is widely used in oil and gas drilling mud system and other liquid and solids separation applications. It can be used in solids control system to treat drilling mud. In this process, decanter centrifuge is used after shale shaker, vacuum degasser, desander and desilter. It is the 4th stage solids control equipment.

Decanter centrifuge can be used in slurry treatment system to drilling the waste water. GN Solids Control is capacity to design and make hydrovac slurry processing system for construction field waste water. It is also called hydrovac slurry waste treatment or waste slurry management system. It is used to reduce the solids waste and cover clean water for reuse. GN Solids Control hydrovac slurry processing system are widely used in U.S.A and Canada.

GN decanter centrifuge can be used in Horizontal Directional Drilling (HDD) Mud Recycling System. GN drilling mud recycling system with decanter centrifuge has been applied in many countries for HDD and CBM drilling operation. Especially popular in Australia ,Indonesia, India etc. With GN Solids America branch and GN Australia Partner, GN provide mud recycling system service and spares from Beijing, Houston, and Brisbane.

GN Solids Control decanter centrifuge can be used in Compact Solids Removal Unit (SRU). Solids Removal Unit (SRU) is used for drilling fluids solids control for the small mining rigs to do diamond drilling.

GN Solids Control decanter centrifuge can be used in liquid mud plant. The Liquid Mud Plant is in place for one primary purpose and that is to keep good drilling mud properties in the wellbore as much as possible. Within each drilling fluids supply base, you can usually find what “Mud” companies are working offshore from this base as they are represented in the form of a Liquid Mud Plant. This liquid mud plant is used to manipulate (mix, dilute, treat, adjust) various drilling fluids to be used in wells supported by this Supply Base.

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.