vertical cuttings dryer

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.

Recently GN solids control shipped one batch of telescopic skid vertical cuttings dryer and decanter centrifuge to an International oilfield service company. This is their repeat order, this client have over 30 units decanter centrifuges and 10 units of vertical cuttings dryer at their rig site for drilling waste management project. Especially in the tough period this year, the economy is going down, oil prices are falling, demand for petroleum products is decreasing, and the oil industry is in a slump, we got the continuous support from our old clients, their trust and repeat order help us a lot, and GN always try to supply the best quality, best delivery time, best after-sales service and spare parts support and the most economic solution. We are growing up together with our customers during the past 10 years.


We have standard design of drilling waste management system package GNCM-40A, which is widely used for oil based drilling cuttings treatment in the world, it consists of vertical cuttings dryer with flushing pump ( screw pump), VFD decanter centrifuge with feeding pump ( screw pump or submersible slurry pump), intermediate tank to receive the fluids discharged from vertical G dryer, telescopic skid for vertical G dryer, telescopic skid for decanter centrifuge, pipelines, tank accessories and tank skid, all of the items are installed on one package for convenient transportation, the design treating capacity is 40 m3/h. We also provide customized design as per client’s requirement.


This customer need the decanter centrifuge and vertical cuttings dryer one 2 separate telescopic skid, by this way, they can use the equipments flexible for different rigs, and they can make the rest accessories locally to save cost. During transportation, the skid height will be down to meet the transportation limit, and during operation, they will be lifted up for archive better separation result.

Recently GN solids control shipped one batch of pitless drilling waste management equipments for International oilfield service company, including high G drying shaker package, sludge vacuum pump, cuttings dryer.


The vacuum pump is 100% air operated pump to transfer drilling waste from waste pit to vertical cuttings dryer ( for OBM & SOBM drilling waste) and high G drying shaker modular ( for WBM drilling waste). No need electricity power, it is suitable for hazardous area application. The suction horizontal distance is up to 50m, discharge distance is up to 500 ~1000m. The max solids size to be transferred is up to 50 ~ 75mm based on different model, and the max solids content is up to 80%. There are 2 operation mode for option, automatically and manually working, the user can choose different operation mode for easy operation. The compact design structure is for easily installation and movement.


The high G drying shaker is normally used for water based mud drilling waste treatment project, the max G force is up to 8.0G so that the discharged solids will be much drier for easy disposal. The clean fluids drop down into the mud tank, the centrifuge feeding pump can transfer the clean fluids to decanter centrifuge for further treatment.


The vertical cuttings dryer is widely used to treat the oil based mud drilling waste management project, we have 2 models of vertical G dryer for option, GNCD930E with treating capacity 40 tons/ hour, which is the best sold model for standard drilling waste management system. The discharged solids with oil content on the cuttings is below 5%, it can be landfilled or disposal directly once it can meet the environmental protection regulations in the client’s country. The discharged fluids flow to a buffer tank, the clean fluids can be transferred by centrifuge feeding pump to decanter centrifuge for further treatment.