screw conveyor

Recently one batch of screw conveyor and screw pumps are shipped to African drilling waste management company. The equipments list are as below:

  1. 10 sets of Variable Speed Screw Conveyor: GNSC12B-12V, the speed adjustment method is manual adjustment. The screw diameter is 12 inch, the screw length is 12ft, the capacity is 20 ton/ hour, the motor power is 5.5KW, the screw speed is 50~60 rpm.
  2. 3 sets of manual adjusted speed screw conveyor GNSC12B-24V, the screw diameter is 12 inch, and the screw length is 24 ft. the screw conveyor can be used to transfer drilling waste (for both water based drilling waste and oil based drilling cuttings), it can be installed horizontally (to collect drilling waste from solids control shale shaker, desander, desilter), and also it can be installed slantly to transfer the drilling waste to vertical cuttings dryer system. The quick open cover system make it convenient for observation and maintenance. The design of sealing rubber with the cover plate to avoid the leakage during working. We can provide pull wire switch for safety purpose as per client’s requirement. The hanger bearing is from reliable brand FAG or SKF for reliable operation. The flights inside the screw is made of wear resistant material, it can also be sprayed with wear resistant coating as per client’s requirement.
  3. 8 sets of Variable Speed Screw Pump: GNG30B-075V, the screw pump can be used as decanter centrifuge feeding pump. The manual speed adjust screw pump can control the feeding rate of the fluids to the decanter centrifuge, so that the decanter centrifuge won’t be blocking due to overloading.
  4. 2 sets of manual adjust speed screw pump GNG10B-040V, this model screw pump can be used as flushing pump of vertical cuttings dryer.
  5. 10 sets of Control panel

Recently one batch of VFD decanter centrifuge and vertical cuttings dryer are shipped to Nigeria for drilling waste management. The details are as below:

  1. 3 units of GNLW363C-VFD decanter centrifuge, this is the best seller for drilling waste management system, the designed capacity is 40m3/h, normal working capacity is about 30m3/h.
  2. 2 sets of GNCD930F vertical cuttings dryer, which is the ideal equipment to treat oil based drilling cuttings, the max speed is 900rpm, max G force is reach to 420G. from the original version GNCD930A cuttings dryer to the lastest version cuttings dryer GNCD930F, we keep improving our design of vertical cuttings dryer as per customer’s feedback, to make it more user friendly, better performance and more convenient operation.
  3. Telescopic skid for the decanter centrifuge and vertical cuttings dryer
  4. Feeding pump ( Netzsch brand screw pump) for decanter centrifuge, flushing pump ( screw pump) for vertical cuttings dryer.
    The customer is familiar with the operation and maintenance of the equipments, they can make the other accessories locally, for example, pipelines for connection, collection hopper to collect the drilling waste from excavator, they can also purchase the screw conveyor from GN solids control based on their requirement. The screw conveyor is to transfer the drilling waste to vertical cuttings dryer feeding port, and also it can be used to collect the drilling waste from solids control equipments, such as shale shaker, without skip, like a zero discharge system.
    GN standard drilling waste management system is a skid mounted unit, the vertical cuttings dryer, decanter centrifuge, VFD control panel, centrifuge feeding pump, telescopic skid, pipelines and accessories, lightings , fluids collection tank are all installed on one skid for convenient transportation. If you need a oil based drilling cuttings waste management solution, pls contact with GN solids control.

Recently 2 sets of drilling waste management equipments are shipped to Africa, including 2 units of vertical cuttings dryer, 2 sets of waste treatment decanter centrifuge, 2 units of screw pump, 6 units of screw conveyor,
The standard drilling waste management system configuration is as below:


1 ea vertical cuttings dryer
1 ea VFD decanter centrifuge
1 ea screw pump as centrifuge feeding pump
1 ea vertical cuttings dryer flushing pump
1 set of cuttings dryer skid and 1 set of decanter centrifuge telescopic skid
1 set of intermediate tank to collect discharged fluids from vertical cuttings dryer


Several units of screw conveyor to transfer the drilling waste to vertical cutting dryer top open feeder port. One unit is horizontally installed to collect drilling waste, one unit is slantly installed to collect drilling waste from the first unit screw conveyor discharge port. The complete package of drilling waste management system is designed as standard container loading size and for convenient transportation.
The vertical cuttings dryer is ideal equipment to treat the oil based drilling waste, the discharged solids with oil content on the cuttings is below 5%, if the discharged solids with higher moisture, the user should check the screen basket status through watching port, if the accumulated solids is already blocking the screen opening, it should be flushed by the high pressure air knife regularly, otherwise the treated solids will be with high moisture, the main motor will be continuously stopped because of over currency.


The VFD decanter centrifuge can separate the fine solids from the vertical cuttings dryer discharged fluids, the cut point is 2 ~5 microns, by adjusting the pump frequency, the user can adjust the feeding rate conveniently. The positive pressured VFD control panel with stainless steel cover, PLC smart control, HMI interface, world famous brand universal VFD inverter.

This week we shipped one unit of GNLW454EP decanter centrifuge and one batch of screw conveyor are shipped to waste water treatment company.
GNLW454EP decanter centrifuge technical specification is as below:


The bowl diameter: 450mm (18 inch)
Bowl length: 1890mm(74.5 inch)
Bowl speed: 3500rpm
Max G force:3084G
L/D ration: 4.2
Main motor power: 55KW
Back drive motor power: 22KW
Beach angle: 11 degree
Bowl material: duplex stainless steel 2205 by centrifugal casting
Screw material: duplex stainless SS316L
Screw impeller protection by tungsten carbide tiles for longer working life and reliable operation
Drive system by VFD control panel with PLC smart control and HMI interface.


GNLW454EP decanter centrifuge is used for waste water treatment by working with chemical dosing system. Except for this model decanter centrifuge, GN also produce 9 inch bowl, 14 inch bowl, 18 inch bowl, 22 inch bowl, 30 inch bowl decanter centrifuge with different treating capacity. They can be used to treat materials for oil & gas drilling mud, drilling waste, oily sludge, industrial waste water, mining tailings, dredging slurry, etc. The G force and operation speed influenced the separation performance a lot.


The screw conveyor is widely used to transfer the material with high solids content. Each section with 12ft length, we can select different qty sections to meet customer’s requirement, 1 section length is 12ft, 2 sections is 24ft, 3 sections is 36ft, 4 section is 48ft. Each auger with protection cover to avoid spilling outside the auger. The flights are made of Mn Steel, wear-resistant coatings can be also sprayed to extend the using life. The bearing is from FAG or NSK brand for reliable performance. The water flushing pipe is equipped outside the auger for flushing.
If you need waste water treatment decanter centrifuge and screw conveyor, pls contact with GN solids engineer.

Recently GN solids control shipped one batch of screw conveyor and vertical cuttings dryer for international environmental Engineering company.


The screw conveyor is used to collect the drilling waste and transfer to vertical cuttings dryer, the discharged solids are also collected and transferred automatically to cuttings box. The vertical cuttings dryer are installed inside the container, with proper open on top for convenient maintenance and operation, and also open doors in proper place, the flushing pump of vertical G dryer and decanter centrifuge feeding pump are also installed inside the container to keep them working in warm temperature. The screw pump is from Netzsch brand single screw pump with explosion proof motor. The fluids treated by vertical centrifuge flow to storage tank, the decanter centrifuge feeding pump transferred the fluids to decanter centrifuge to separate more fine solids.


The screw conveyor is U type screw conveyor with rotating screw to move the material along the fixed casing continuously. We can make feed port and discharge port at any position in the length direction as per client’s requirement. Not only for drilling waste, the screw conveyor can be also used to in different industries, as food, medicine, chemicals, paper making, environmental solutions, construction industry and other industrial applications. To select a proper model screw conveyor, we need to know the required transfer capacity and power required and transfer length. We have 10 inch, 12 inch, 14 inch, 16 inch, 18 inch screw diameter for option, and divided each section as 12ft, we have 12ft, 24ft, 36ft and 48ft for option.


For GN screw conveyor: the screw flights are made of wear resistant and thicker manganese steel, and it is aso sprayed with wear resistant coating to prolong its working life. The bearing seats are made of aluminum casting for reliable performance.