Desander Desilter

Vertical G dryer is ideal equipment to treat oil based mud drilling waste, the screw conveyor is matched equipment is to transfer the drilling waste to vertical G dryer. Recently one batch of vertical cuttings dryer and screw conveyor are ready for shipment to International Environmental Engineering Company. GN own made screw conveyor with features as below：

1） The upper cover or steel grating of the screw conveyor for quick switch or both available for customer’s option. The steel grating design is convenient for observation and maintenance.
2） The bearing brand is FAG or NSK for longer working life.
3） The material touch part– screw flights are made of wear resistant and thicker manganese steel, and also sprayed with wear resistant coating to extend the working life.
4） The screw conveyor reinforced frame is with high strength for horizontal and inclined installation. The inclined installation angle should be less than 45 degree.
5） The bearing sears are made of aluminum casting.
6） The inner bearing housing with self-lubricating HWS alloy hanging bearing core with grease filling nozzle to facilitate the injection of grease.
7） The good quality rubber sealing inside the shell cover plate to prevent the dust/ liquids leakage in operation.

8） The major components of screw conveyor including : bearing block assembly at motor side, intermediate hanger bearing and shaft assembly and tail bearing block assembly.
9） Each section to be made as 12ft length, we offer 1 section, 2 section, 3 section or 4 sections with different length for option.
The vertical cuttings dryer can treat the oil based mud drilling waste to drying cuttings with OOC below 5%, in some countries, OOC 5% is permitted for landfill or construction industry (to make bricks). In most developed countries, the permitted limit is OOC below 1% by TDU.

WBM waste treatment main equipments including drilling cuttings drying shaker, high speed/ VFD decanter centrifuge, drilling cuttings solidification unit, chemical dosing unit, the basical working process is as below:

2 units of drying shaker standard modular to be installed under the solids control shale shaker to pick up the water based mud drilling cuttings, the cuttings collection box is equipped for each drying shaker to collect the waste. The discharged fluids dropped into the catch tank under each drying shaker through shaker screens, the feeding pump transfer the fluids to VFD decanter centrifuge, which is installed on the telescopic skid with VFD control panel, the feeding pump is also installed on the centrifuge skid. The fluids from decanter centrifuge flow to intermediate tank ,the submersible slurry pump transfer the fluids back to solids control system reserve tank.

The discharged solids from drying shaker, decanter centrifuge, and the drilling waste collected by screw conveyor from desander, desilter, solids control decanter centrifuge are all feed to cuttings solidification unit, mixed with cement and lime (solidifying agent) in the vessel to get the dry disposal material, the solidified drilling waste can be used for landfill since the hazardous material will not leak, it is safe for landfill.
If the treated fluids will not be reused to prepare for new drilling fluids, and the user want to get pure water, chemical dosing system with VFD dewatering centrifuge will be used, the decanter centrifuge can separate cut point up to 1 microns by adding flocculants. The decanter centrifuge is drived by VFD control panel with self cooling system or air conditioner, which is positive pressurized, 3 VFD including main motor, back drive motor, pump motor.
If you need a customized solution for water based mud drilling waste treatment system, pls contact with GN solids sales engineer.

As the professional manufacturer of TBM slurry separation plant in China, GN Solids control can design and produce mud cleaning/ recycling/ mixing tank system for all kinds of solids and liquid separation applications. An efficient TBM slurry separation plant is the successful use of slurry supported tunnel boring machine (TBM) and pipe jacking machines. Normally the TBM projects are footprint limited, GN designed TBM slurry separation plant is with compact design and reliable performance, convenient maintenance.

Main features of GN TBM slurry separation plant:
1) Compact footprint, reliable working
2) Easy transportation, containerized size for convenient movement, the user can easily move it from one project to another.
3) 5 phase separation system for better result
4) Economic proposal and high configuration proposal for option based on different requirement

For example, if the project required solids separation cut point is only 45 microns, we will suggest economic proposal for GNMS-500D and GNMS-1000D, the treating capacity is 500gpm and 1000gpm, the desander cone installed on the double deck shale shaker, the feeding pump can feed to mud to desander cone and also work as transfer pump, the control panel also installed on the same unit. The mud discharged from desander cone dropped down to the mud tank as intermediate tank, it will flow to the storage tank finally.
If the client need a high configuration proposal with bigger treating capacity and the cut point is below 20 microns, we will provide GNTBM-240, GNTBM-360, GNTBM-500 models, for example, if the client required capacity is 800m3/h capacity, we will use GNTBM-360 with GNTBM-500 as combination system. If the user required capacity is 1000m3/h, we will use 2 units of GNTBM-500 slurry separation plant. And so on, 1500m3/h slurry separation unit with 3 units of GNTBM-500 system.
For more details, pls contact with GN solids sales.

As one of the professional manufacturer of solids control system, drilling mud cleaning system, drilling waste management system in China, GN solids control can produce mud cleaning system for both onshore and offshore project, we can make customized design for different requirement. Recently one unit of customized design mud cleaning system are ready for shipment to our customer, the technical configuration is as below:

1) Linear motion shale shaker: it is the first phase cleaning to reduce the solids content and separate coarse solids from the drilling fluids, the operator can use different API mesh shaker screens to adjust the density, viscosity of the drilling fluids to meet drilling requirement, a good performance shale shaker can reduce the drilling waste effectively. The 2ea Italy Oil brand vibration motor drive the shale shaker, the shaker screen fixed by wedges, the shaker deck bottom is made of stainless steel for better corrosion resistance.

2) Linear motion mud cleaner including desander cone, desilter cone and bottom shale shaker. desander cone is the second phase cleaning, desilter cone is the third phase cleaning, the desander cone and desilter cone are made of 100% PU for longer working life, the composite material frame shaker screens can last longer and the effective screen area is larger, the separation performance is better, the storage period can last longer.
3) Centrifugal pump, which can be used as mixing pump, desander/ desilter feeding pump, transfer pump, charging pump, trip pump, it is installed inside the frame for convenient transportation and lifting from land to offshore rig platform. The lifting pad can be certified by DNV as per client’s requirement. The pump casing and impeller material is ductile hard alloy for better abrasion resistance.
If you required drilling mud cleaning system for onshore or offshore project, pls contact with GN solids engineer.

Recently GN solids control shipped one unit of dewatering unit to Africa, the client already bought dewatering centrifuge from GN before, he needs to use chemical dosing unit for new projects, considering the hot temperature weather in Africa, we put the dewatering unit into standard container for convenient transportation and water/ sun proof, the container with windows, doors, air conditioner, lightings. The dewatering unit including three tank automatical powder polymer mixing system and Coagulant mixing tank, the user can use either flocculants or coagulant for different purpose.

The working process is as below:
The powder chemicals are adding into the hopper for mixing and aging, the 3 tanks ensure the continuous operation, the chemical dosing pump transfer the mixed chemicals to centrifuge feed tube, and mixed in the Static mixer before feeding to the dewatering centrifuge feed tube. The most popular model is GNLW363C-VFD, the bowl diameter is 14 inch, the bowl length is 50 inch, the max speed is 3900rpm, the normal working speed is 3200rpm, the max G force is 3063G, the typical G force is 0~2062G, the mechanical separation cut point is 2~5 microns, by working with dewatering unit, the separation cut point is up to 1 microns, most of the ultra fine solids can be separated out, the customer can get pure water and drier solids for final disposal.

The VFD control panel drive the main motor, back drive motor and pump motor to set bowl speed and differential speed, the pump speed can be also adjusted to adjust the feed flow. The PLC smart control and HMI interface ensured the automatically operation.
Except for GNLW363C-VFD, we also have GNLW453-VFD and GNLW553-VFD and GNLW674-VFD decanter centrifuge for option with larger treating capacity. If you need a dewatering centrifuge unit solution, pls contact with GN for more information.

As one of the professional manufacturer of solids control equipments and drilling waste management system in China, GN solids control also design and produce drilling cuttings transfer system based on different drilling rig floor plan. Basically the way to transfer drilling waste including screw conveyor system, cuttings vacuum pump and cuttings transfer pump.
1) Screw conveyor system: it is widely used to collect and transfer drilling waste from solids control equipments to drilling waste management system, but it is also limited when liquid moisture is very high, it is easily leakage and flow back, and the space requirement is too big, especially for offshore rig, when space is very limited, and power consumption is higher compared with other ways. But it is more popular way right now. There are 2 installation ways, the first one is to use the excavator to dump the drilling waste to the collection hopper of the screw conveyor when there is a waste pit, then the screw conveyor transfer the drilling waste to vertical cuttings dryer ( for oil based drilling waste) or high G drying shaker( for water based drilling cuttings). The second installation way is that there is no waste pit at rig site, the screw convetor ( horizontally installed) to collect the drilling waste from shale shaker, desander, desilter, then a slantly installed screw conveyor to transfer them to the drilling waste management system.
2) Vacuum pump can be used to transfer drilling cuttings from waste pit to screw conveyor collection hopper, or transfer to vertical cuttings dryer directly, an air compressor is required to supply air to operate the vacuum pump, since the required air compressor model is very big, which limited the utilization of the vacuum pump, but the space required is small.
3) Cuttings transfer pump is a new pump introduced for cuttings transfer when space is very limited. For more information, pls contact with GN solids control.

GN decanter centrifuge is used for a waste water treatment project in power plant in Taiwan. Total 5 units of GNLW454E decanter centrifuges are utilized for this project, we received the lab samples of the materials to be treated before their order, we make a lab test in our factory by professional engineer and make some customized design to meet the customer’s requirement for treatment result.

Features of the 5 units of GNLW454EP decanter centrifuge:
1) Bowl material is made of duplex stainless steel 2507 for better corrosion resistance, our standard design of bowl material is duplex stainless steel 2205 or 2304, which is much better in anti-corrosion than SS316L and SS304 used by other competitors. Because the waste water to be treated with highly corrosive chemical water, we made customized design specially for this project.

2) The bearing is from SKF brand for longer working life.
3) The screw impeller is protected by tungsten carbide tiles for longer working life, and the open impeller design will increase the treating capacity and improve the separation performance, the tiles is repairable once it is damaged, especially suitable for the material with higher solids content.
4) The main motor is 45KW, the back drive motor is with 11KW. Both motors are installed on one side for compact design and enough space for operation.

GNLW453C-VFD and GNLW452D decanter centrifuge are all with 18 inch bowl, they can be used for drilling mud solids control and drilling waste management system, it can be also used as dewatering centrifuge with chemical dosing system.

Except for 18 inch bowl decanter centrifuge, we also have 14 inch bowl, 9 inch bowl, 22 inch bowl, and 30 inch bowl decanter centrifuge models for different industries.
If you need a decanter centrifuge solution, pls contact with GN solids control.

Recently one batch of mud cleaner for offshore drilling are ready for delivery, as one of the most professional solids control equipments and drilling waste management equipments manufacturer in China, GN Solids Control can produce shale shaker, mud cleaner, desander, desilter, vacuum degasser, decanter centrifuge, mud agitator, mixing hopper, mud gun and others solids control equipments for both onshore and offshore drilling rig. The standard equipments design is same, just for different applications, the explosion proof standard and lifting design will be different. The lifting frame and lifting pad can be DNV 2.7-1 and CSS approved. The motor and starter can be IEC EX & ATEX for zone 1 or zone 2 application.

The mud cleaner is a combination of desander cone ( 10inch), desilter cone ( 4 inch) and bottom shale shaker, it is also called 3 in 1. The compact design can save space on the solids control system mud tank, especially when the mud tank size is also compact. 2 nos of centrifugal pump as feeding pump of desander cone and desilter cone, GN produced centrifugal pump is interchangeable with world famous brand centrifugal pump, the pump casing and impeller are made of ductile iron for better wear resistance capability.
Depends on the drilling fluids temperature, if it is over 70℃,we will use special material desander cone with outter metal cover to prevent it from reform and damage. The desilter cone is 100% polyurethane material for longer working life.

The shaker screen is composite material frame shaker screen with SS316L material wire mesh. Our screens have been tested by API third party lab and got the report, all of GN shaker screens are produced comply with API RP13C standard.
The patent sealing rubber design ensure the good sealing of the shaker screens on the shaker deck, the bottom deck is made of stainless steel for better corrosion resistance.

Recently we shipped 4 package of fully hydraulic drive decanter centrifuge for Middle East client, including the feeding pump of decanter centrifuge with manually adjust speed . This is a repeat order of the client, the driven unit is Viscotherm and Rotidiff from Sweden.
The 4 package of decanter centrifuges are with 14 inch bowl, which are made by centrifugal casting and using SS2205 or SS2304. The screw propeller is protected by tungsten carbide tiles or build up welding. The solids discharge port and fluids distribution port are protected by tungsten carbide alloy. The customer can choose centrifuge support legs, solids discharge trough, telescopic skid for option.

Except for full hydraulic drive decanter centrifuge, GN solids control also produced VFD decanter centrifuge and rated speed decanter centrifuge to meet for different requirement. The purpose to use full hydraulic drive decanter centrifuge instead of VFD decanter centrifuge is to adopt it in high temperature ambient for heavy mud with flexible bowl speed and differential speed, especially in Middle east and Africa and other high temperature area.

The VFD decanter centrifuge can be also used in such high temperature area up to 55℃, based on different explosion proof standard requied for electric motor and control panel, we have 2 design: one is VFD control panel with self cooling system, the other one is VFD control panel with air conditioner for cooling. But when environment temperature is higher than 50 ℃,full hydraulic drive decanter centrifuge is more suitable for such applications, even though the price is a little higher, and the maintenance cost is higher compared with VFD decanter centrifuge which is drived by electricity. The rated speed decanter centrifuge can be used for solids control system drilling fluids treatment, when used it for barite recovery, the user can replace middle speed pulleys with belts.

Recently 2 package of tandem shale shaker are shipped to India drilling company, including the spares and shaker screens with different API mesh size and tool kits. The features of the single shale shaker is as below:
1) Stainless steel material with all the vibration and non vibration components, including shaker deck, vibration beam, shaker screens, shaker deck bottom, etc, which is better for anti corrosion.

2) The sealing rubbers are applicable to SOBM, OBM and WBM, all types of mud, the unique patent design sealing rubbers can extend the working life of sealing rubber, to prevent the mud from leakage and for better sealing performance.
3) The vibration motor is DGMS approved, and also international explosion proof, such as IECEX, ATEX, CNEX.
4) The starter, cables, glands and other electrical components are all IEC explosion proof to meet the local requirement.

5) The high G force up to 7.5G to ensure the good performance of the separation, the deck angle adjustment by both ends simultaneously is user friendly design, so that the deck angle adjustment can be done by one worker easily without need another person’s join in.
6) The shaker screens are all made of composite material frame with SS316L material wire mesh for longer working life, we have passed the API RP13C TPI inspection, all of the screens are produced as per API RP13C standard.
7) The possum belly and tandem shale shaker skid are included, with the connection pipelines from poor boy degasser to trip tank, and the side discharge trough design can allow the drilling waste flows to the specific waste pit directly
We can also make triple shale shaker on one skid with possum belly and pipelines, and the desander, mud cleaner, if you need solids control equipments, pls contact with GN solids control.