vertical cuttings dryer

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.

Recently GN solids control shipped 4 units of jet mud mixer and 2 sets of vertical cuttings dryer to China drilling company.


The jet mud mixer is a combination of mud mixing hopper and mixing pump with pipelines, valves, control panel all in one skid as a complete mud mixing package, the user can put in on the flat ground and connect it with the existing mud tank by flexible hose conveniently. The venturi hopper working pressure is 0.25 ~ 0.4 Mpa, it can be equipped with proper mixing pump for different mixing capacity, including 320m3/h, 272 m3/h, 200 m3/h, 150m3/h, 120 m3/h, 90 m3/h, 65 m3/h, 55m3/h, 45 m3/h, for client’s different mixing capacity requirement, we will select proper model.
The mixing hopper can be installed on the tank top and the mixing pump installed on the tank skid for better mixing performance. The mixing hopper and mixing pump can be both installed on the tank skid.
The vertical cuttings dryer is ideal equipment for oil based drilling waste treatment system, it works together with decanter centrifuge. GNCD930 vertical cuttings dryer is the most popular model among our drilling waste management equipments. The screw conveyor transfer the drilling waste to vertical cuttings dryer, the discharged solids from vertical cuttings dryer with OOC below 5%, it can be landfilled or for construction industry. If the disposal limit in the client’s country is below 1%, further treatment like TDU should be applied to meet client’s requirement.


The discharged fluids will flow to the intermediate tank, the decanter centrifuge feeding pump transfer the fluids to decanter centrifuge to separate fine solids, the discharged fluids from decanter centrifuge can be reused to prepare for new drilling fluids with mixing hopper.
If you need solids control equipments and drilling waste management equipments, 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.

The main equipment to be used for OBM waste treatment is vertical cutting dryer and decanter centrifuge, depends on different countries environmental regulation, the oil content required for drilling cuttings disposal is different, normally below 5% is acceptable for developing countries, below 1% is acceptable for developed countries. GN vertical cuttings dryer treatment result for the discharged solids is OOC 3% to 5%.We also have standard design for drilling cuttings dryer system as a compact package for convenient transportation and operation.


There are different ways of feeding system to vertical cuttings dryer, including vacuum pump, drilling cuttings transfer pump, screw conveyor system.
Vacuum pump is 100% air operated pump, it can be widely used for electricity power supply area, and the space requirement is very small. It is the ideal equipment to transfer drilling cuttings, sand, cement, drilling fluids, waste water, oil sludge, animal waste, etc. materials, and the suction distance is up to 50m and discharge distance is max 1000m, especially for the high solids content material.


Drilling cuttings transfer pump is drived by hydraulic cylinder and S-style distribution valve, it can be used to transfer high solids concentration material, less moisture, big solids size and high abrasion material.
Screw conveyor system is traditional drilling cuttings transfer way, normally one set of screw conveyor picked the drilling cuttings from shale shaker, desander, desilter horizontally, one set of screw conveyor is installed slantly to pick up the drilling cuttings from #1 screw conveyor and transfer to vertical cuttings dryer. The installation space is larger than vacuum pump and cuttings transfer pump.
The vertical cuttings dryer discharged fluids flow to intermediate tank and the centrifuge feeding pump feed the fluids to decanter centrifuge to separate fine solids, the mechanical separation cut point is 2~5 microns. The treated fluids can be recovery to solids control system to prepare for new drilling fluids.

Recently GN solids control shipped 2 sets of containerized vertical cuttings dryer system for OBM treatment to Russia. This is the repeat order from the Russia client, the technical specification is as below:
1) One unit of vertical cuttings dryer GNCD930E to treat oil based drilling cuttings


2) One unit of mud tank to storage the fluids discharged from vertical cuttings dryer, the mud agitator is installed on top of the mud tank.
3) One unit of 40ft standard container with proper window and doors, the handrails, stairs are equipped properly to meet HSE requirement. The bottom opening is for discharge of solids from vertical cuttings dryer discharge port, it will be collected by screw conveyor and transferred automatically to cuttings box. There is insulation materials inside the container inner wall to keep the equipments warm for continuous working in winter, when the environmental temperature is below -5 degree.


4) All of the electric motor and control panel are explosion proof for zone 1 and zone 2. We can also provide IEC EX and ATEX, UL certified explosion proof motor and control system for special requirement.
The decanter centrifuge can be also installed inside the 40ft container on top of the support frame, the container top can be opened for maintenance and parts replacement. The VFD decanter centrifuge is used to treat the discharged fluids from vertical cuttings dryer, to separate more fine solids from the fluids, the recycled water can be reused to prepare for new fluids. The VFD control panel can adjust the bowl speed, differential speed and pump speed to adjust the feed flow rate.
The vertical cuttings dryer is the ideal equipment to treat the oil based mud drilling waste management, the separated solids with oil content in the cuttings is below 5%, which is allowed for landfill in some countries.