Category: drilling waste management

16 Packages GN Solids Control Centrifuge for Offshore Drilling Company

Recently 16 packages of GN solids control centrifuges are shipped to offshore drilling company, this is the repeat order from this client.


The offshore decanter centrifuge package including one centrifuge with feed pump and solids discharge trough, one offshore skid, one fluids catching tank and transfer pump, one offshore used VFD control panel. All of the equipments are installed as compact unit for offshore application, the skid and decanter centrifuge lifting pad is designed comply with DNV 2.7-1 standard.
The decanter centrifuge motor and VFD control panel is adopted with offshore applied explosion proof standard. The ambient temperature to be used is -20℃ to +55℃.The standard atmospheric pressure is 80 Kp to 110Kp, normal oxygen content 21%, it can be used with altitude <1000m, relative humidity less than 95%. One centrifuge is composed of main bowl assembly, power drive system, feeding and discharge device and electrical control system.


The decanter centrifuge is widely used in the solids control and drilling waste treatment project, it works to separate the solids phase from drilling fluids, remove the harmful fine drilling solids such as debris in the drilling mud, or recover weighting materials such as barite , etc. as to save the drilling fluids cost. The decanter centrifuge can be used for both onshore and offshore projects, but the electric motor, control panel including VFD control panel, cables standard are different.
GN solids control can produce 9 inch bowl centrifuge, 14 inch bowl centrifuge, 18 inch bowl centrifuge, 22 inch bowl centrifuge, 30 inch bowl centrifuge, each size decanter centrifuge provides 2 models as rated frequency and variable frequency drive. Except for 2 phase decanter centrifuge, we also produce three phase decanter centrifuge to separate oil, solids and water for oily waste water treatment.
If you need a decanter centrifuge package, pls contact with GN solids control.

GN Decanter Centrifuge System for Africa Oilfield Waste Water Treatment

Recently one set of GN decanter centrifuge separation system are ready for shipment to Africa oilfield waste water treatment project. The system including mixing module, decanter centrifuge separation module, chemical dosing unit module, water recovery and transfer module.


The mixing module including mixing tank with mud agitator, to mix the oilfield waste water, the decanter centrifuge feeding pump will suck the water from the mixing tank to decanter centrifuge, at the same time, the chemical dosing unit will prepare the mixed chemicals and the screw pump will transfer the chemicals to centrifuge feed tube, so the decanter centrifuge can treat the waste water better, the treated water will flow to the water recovery tank and will be transferred to other tanks by the transfer pump.


The decanter centrifuge can separate the waste water into solids phase and liquid phase, GN also produce three phase decanter centrifuge, to separate the waster water into oil, water and solids. A three phase decanter centrifuge uses continuous high G centrifugal force to separate components based on density differential. The three-phase separation (solids, water, oil) happens because:
Solids (highest density) move to the bowl wall.
Water (middle density) forms an intermediate layer.
Oil (lowest density) forms an inner layer (if present in sufficient quantity).

GN decanter centrifuge features including:
1. The bowl and screw core shaft are made of duplex stainless steel SS2205 or SS2304 by centrifugal casting, which is superior to the performance of SS304 and SS316;
2. The solids outlet and liquid outlet are protected by replaceable hard alloy sleeve.
3. The main material of the screw is duplex stainless steel SS2205 or SS2304.
4. The screw propeller is protected by tungsten carbide tiles for longer working life.

For more information of GN decanter centrifuge separation system, pls contact with GN solids control.

GN Drilling Cuttings Treatment Equipment for Middle East Customer

One batch of GN drilling cuttings treatment equipments are ready for delivery to Middle East customer, including 3 sets of high G drying shaker GNZS594K and 2 sets of vertical cuttings dryer GNCD930G.
What is the difference of high G drying shaker with vertical cuttings dryer?
1. Application difference: The high G drying shaker is normally used to treat water based drilling cuttings, the vertical cuttings dryer is normally used to treat oil based mud/ drilling cuttings.


2. Working principal difference: High G drying shaker ( also called as high G dryer) is high vibration G force shale shaker with fine mesh shaker screens. It is drived by 2ea vibration motors, the shaker screen is 4 pcs of 585x1165mm composite material frame shaker screens. When the water based drilling cuttings are feed to high G dryer buffer tank, the massive G force immediately pins solids against the fine screen mesh ( as fine as 200 mesh/74 microns).Liquid passes through the screen and is recovered, while dry solids are conveyed and out by augers.


Vertical cuttings dryer ( also called as verti-G dryer), when the OBM or SOBM wet cuttings are feed to verti G dryer feeding port by screw conveyor, A stainless steel screen basket traps wet solids and accelerates it up to 900rpm with up to 420G, the liquid is forced through screen openings, the dry solids are extracted by the angled flights attached to the rotor, which rotate slightly slower than the screen. The tungsten carbide protect the flights from abrasive solids and ensures longer operation life.
3. Treatment result is different.
The high G drying shaker can dry the WBM drilling cuttings with moisture less than 30% ~ 40%, the vertical cuttiings dryer can dry the SOBM drilling cuttings with OOC <5%, which can be sent to Thermal Desorption Unit for further treatment.

16 Sets Drilling Mud Centrifuge and Vertical Cuttings Dryer for overseas oilfield service company

Recently 16 sets of drilling mud centrifuge and vertical cuttings dryer are ready for delivery to overseas oilfield service company.
One set of drilling mud centrifuge package including 1 unit of decanter centrifuge, telescopic skid and 1ea decanter centrifuge feeding pump. GNLW363D decanter centrifuge is the most popular high speed decanter centrifuge used for drilling mud treatment and drilling cuttings treatment. The bowl diameter is 14 inch, the bowl length is 50 inch, the designed treating capacity is 200gpm, and typical capacity is 132 gpm. The max bowl speed is 3900rpm, and typical bowl speed is 3200rpm. The max G force is 3063G, typical G force is 2062G. The separation cut point is 2 ~5 microns.

One set of vertical cuttings dryer package including 1 unit of vertical cuttings dryer, cuttings dryer skid, flushing pump and solids discharge system. The most popular vertical cuttings dryer model is GNCD930G, the treating capacity is 30 ~50 tons per hour. For the oil based drilling cuttings fresh collected from primary solids control shale shaker, the treated oil content in the cuttings is less than 5%. If the client needs less oil content in the cuttings, the solids discharged can be sent to Thermal Desorption Unit. The screen diameter is 930mm, we have 0.25mm, 0.35mm, 0.5mm three type screen opening for option. The rotation speed is 900rpm, G force is 420G, oil tank capacity is 48L. The main motor is 55KW, the oil pump motor 0.55KW.The standard vertical cuttings dryer with solids discharge collection hopper, as client’s requirement, GN designed customized solids discharge system with vibration motor for faster solids discharge.


Except for decanter centrifuge package and vertical cuttings dryer package, GN solids control also produce different size screw conveyor, high G drying shaker and complete line of solids control equipments and shaker screens.

IECEX Explosion Proof VFD Decanter Centrifuge for Middle East Client

One batch of IEC explosion proof VFD decanter centrifuge are ready for shipment to Middle East, including VFD decanter centrifuge, VFD control panel, feeding pump and telescopic skid package.


Except for VFD decanter centrifuge, GN solids control also produce high speed decanter centrifuge, middle speed decanter centrifuge and fully hydraulic drive decanter centrifuge. Not only two phase decanter centrifuge, we also produce three phase decanter centrifuge. It can be applied for oil and gas drilling solids control system and drilling waste management system, oil sludge treatment system, also it can be used for HDD tailing slurry separation, mining slurry separation, construction engineering mud cleaning and other waste water treatment.
GN decanter centrifuge features including:


1. The bowl main parts are made by centrifugal casting and made of duplex stainless steel SS2304, superior to the performance of SS 314 and SS316.
2. The main material of the screw assy is duplex stainless steel SS2304, superior to the performance of SS314 and SS316L.
3. The screw propeller is protected by tungsten carbide tiles and it is replaceable, the working life is much longer than hard facing wear resistant coating layer.
4. The slag discharge port is protected by replaceable hard alloy sleeve.
5. The liquid outlet is also protected by replaceable hard alloy sleeve.
6. The SKF high quality bearing ensure the reliable operation and long service life.
7. The bearing lubrication system is applied for big model decanter centrifuges, such as 22 inch, 30 inch bowl diameter decanter centrifuge, it can meet the requirement of heavy load and high speed operation, which can improve the service life of bearings.
8. Planetary gearbox with large transmission torque, smaller size, stable operation and easy maintenance.
If you need a good performance and high quality VFD decanter centrifuge, pls contact with GN solids control.