shale shaker

One unit of mud cleaner unit and one unit of decanter centrifuge are shipped to international drilling company. The order including one set of mud cleaner installed on the mud tank with 2 centrifugal pump as feeding pump of desander cone and desilter cone, and one unit of mixing hopper, one unit of mixing pump, and one unit of decanter centrifuge.
The decanter centrifuge features including:

  1. Bowl assy are made of duplex stainless steel 2205 or 2304, the other components of bowl are made of stainless steel 316L, the bowl collection vessel are made of SS304
  2. The bearing are SKF brand
  3. The fluids distribution port and solids discharged port are all protectedby tungsten carbide alloy, when it is damaged, it is interchangeable.
  4. The screw is made of SS304 material by heating treatment to 1000℃, the impeller are protected by tungsten carbide tiles, which is repairable
  5. We can make different size decanter centrifuge with different bowl size, including 9 inch, 14 inch, 18 inch, 22 inch, 30 inch.
    The mud cleaner is a 3 in 1 equipment including desander cone, desilter cone, bottom shaker, the treating capacity is 500gpm, the desander cone separation cut point is 45 microns, the desilter cone separation cut point is 20 microns, the composite material frame shaker screen are installed on the shale shaker with longer working life. The desander feeding pump feed the slurry to desander cone, the clean fluids drop into desander compartment, the desilter feeding pump feed the fluids to desilter cone, the clean fluids drop into the mud tank desilter compartment, the chemicals are adding by the mixing hopper, the mixing pump mix the clean fluids with powders to prepare for new drilling fluids, which can be reused for drilling. If required, the decanter centrifuge can separate fine solids size 2 ~ 5 microns.

Recently one set of vibration shaker for liquid solids separation are shipped to environmental service company.


It is consist of 2 mud tanks, each tank with 1 unit of vibration shaker, 1 unit of centrifugal pump, 1 unit of mud agitator, 1 ea lighting, walkway, stairs, guard rails, valves, and pipelines, etc. accessories. The vibration shaker with water spray system to prevent solids blocking of the screen. For different applications, the shaker feeding system have different options as weir feeder, top box feeder, hopper feeder. In this system the shale shaker feeding way is top box feeder through pipelines on the top. The centrifugal pump’s impeller and pump casing are made of hard ductile iron alloy for better abrasion resistance, to protect the centrifugal pump impeller and pump casing, the shale shaker should separate most of the coarse solids from the liquid and the discharged solids should be as dry as possible. The shaker screen installed on the shale shaker is composite material frame shaker screen for longer working life, especially for the slurry with high solids content. The shaker screens are produced by GN solids control and comply with API RP 13C standard, the wire mesh is made of stainless steel 316L, the frame are made of composite material for longer storage life and durable working life.


For oil &gas drilling application, there are 2 vibration modes for option, linear motion and progressive elliptical motion to meet different requirement for their drilling fluid.
For solids liquid separation application, normally we only need linear motion with high G force up to 8.0 G for better drying performance.
The further treatment equipment after shaker is decanter centrifuge with dewatering unit, to separate more fine solids from the fluids and get pure water, most of the fine solids can be separated out up to 1 micron.

We have over 11 units of Hydrovac Slurry Treating System working in North America, especially in USA.
The purpose to use GN Hydrovac Slurry Treating System is to get solids and recover water, the water can reused to flush the hydrovac trucks and send to third party waste water treatment facility for further treatment, and reuse for other applications. After the first unit of Hydrovac Slurry Treating System successfully working in USA, we have got similar inquries from our customers in the same industry, we will provide customized design system for their different requirement.


What is hydrovac excavation?
Hydro Excavation is the process of removing or moving soil with pressurized water. Large volume water is required for Hydro Excavation, water recovery can save cost for the user of Hydro Excavation.
By using GN Hydrovac Slurry Treating System, the user can recovery most of fluids from discharged solids, which is environment friendly and reduce solids disposal cost.
The technical configuration is as below:
1) Slurry collection hopper modular to receive slurry from the Hydrovac truck conveniently
2) Coarse solids separation shaker modular to separate big solids from the slurry, the shaker screen is special for durable life during working.
3) Fine solids separation shaker and desilter, the 4 inch desilter cone separation cut point is 20 microns


4) Decanter centrifuge modular with chemical dosing unit
A big bowl big volume decanter centrifuge should be applied when chemical is adding into the fluids, the function is to accumulated ultra fine solids to bigger size solids, so that it will be easily separated out by centrifugal force, the max G force of GNLW553C-VFD decanter centrifuge is 2719G, max speed is 3000rpm. The separation cut point is 2~ 5 microns.
5) Mud tank to install all of the equipments on it in modular for convenient transportation.

Recently one set of small solids liquid separation unit and one package of decanter centrifuge are shipped to Europe client.
The technical configuration of the small solids liquid separation unit is as below:


1) 1 unit of 2 panel shale shaker GNZS752F installed 2 pcs composite material frame shaker screens, we can produce shaker screen from API 20 to API 300 comply with API RP13C standard. The shale shaker is to separate coarse solids from the fluids and reduce the solids content.
2) 1 unit of decanter centrifuge GNLW223D-VFD with feeding pump, the max capacity is 130L/min, normal capacity for waste water is 100L/min, the bowl length is 26.4 inch with ratio 3.


3) 1 unit of mud tank to install the decanter centrifuge and shale shaker on top, the feeding pump is installed on the skid of the tank.
4) One set of electric control system to control all the motors, all the equipments are labled and certified with CE.


Besides the solids liquid separation unit for drilling, the client also required one package of decanter centrifuge GNLW224E, the bowl diameter is 9 inch (220mm), bowl length is 36.4 inch (924mm), the ratio of bowl length/ bowl diameter is 4.2, which is much bigger than GNLW223D, which with bowl length 670mm/ bowl diameter 220mm =3. The fluids will stay in the bowl for longer time and the discharged water is more clear. The max bowl speed is 5000rpm, the typical bowl speed is 0 ~ 4500 rpm. The max G force is up to 3077G, the typical G force is 2492G, with main motor 11KW, back drive motor 5.5KW, the gearbox ratio is 95:1, the gearbox torch is 1400 N.M. The decanter centrifuge are installed on the frame for convenient lifting and transportation, the catch tank under the decanter centrifuge to collect the discharged fluids.

WBM waste treatment system technical specification:
1) High G drying shaker to separate coarse solids from the drilling waste,
2) VFD decanter centrifuge to separate fine solids from the drilling fluids, the chemical dosing system add chemicals into the waste water to improve the separation performance and efficiency.

The working principal of the decanter centrifuge to separate fine solids from the fluids is as below:
The bowl and the screw ( inside the bowl) rotate by the same direction with a differential speed. the waste water is fed to the screw shaft by the centrifuge feeding pump, under the centrifugal force working, the solids desposited to the bowl wall and the solids is continuously pushed to the cone section of the centrifuge bowl and discharged to solids distribution port. Because of the gravity difference, the fluids overflows to the liquid distribution port which is in big end of the bowl. The straight bowl material is made of duplex stainless steel 2205 or 2304 by centrifugal casting, as clarification phase, the cone section is made of stainless steel 316L, which is as extrusion drying area. To adjust the differential speed by VFD control panel is very important operation for VFD decanter centrifuge, it will influence the decanter centrifuge separation performance a lot, the user should read the operation manual carefully and to be trained to input correct differential speed by the touch screen and controlled by PLC smart control.


The flow rate can be controlled by adjust the frequency of pump motor. When start the decanter centrifuge, the flow rate should be set properly in case that high flow rate lead the too high electricity currency which will burn the motor.
After treated by decanter centrifuge, most of the ultra fine solids up to 1 microns will be separated out and get relative pure water.