Author: gnadmin

GN Decanter Centrifuge and Cuttings Dryer for Africa Drilling Company

One set of GN decanter centrifuge and vertical cuttings dryer are using for Africa drilling company. The equipments list including:
2 units of decanter centrifuge，model GNLW363D-VFD
1 unit of vertical cuttings dryer，model GNCD930G
Matched with screw conveyor, centrifuge feeding pump and vertical cuttings dryer flushing pump.


The screw conveyor GN produced including 10 inch, 12 inch, 14 inch, 16 inch and 18 inch diameter for option, each section standard length is 12 ft, we can use different quantity sections as per client’s requirement of transfer length, such as 12 ft, 24 ft, 36 ft, 48 ft, 2 sections are connected by pin shaft hanger. The screw conveyor can be fixed speed or variable speed( manually speed adjustable) to control the feeding rate. The screw propeller material is High Chrome Alloy Steel for longer working life.


According to the installation position and function of the screw conveyor, there are auger system for primary shale shaker discharge solids collection, desander desilter discharged solids collection, feeding to vertical cuttings dryer feed hopper, solids discharge auger for vertical cuttings dryer, solids discharge auger for decanter centrifuge, etc. The protection cover on the U type reinforcing beam could be closed steel plate or steel grating for option.
Additional safety protection of the screw conveyor:
1) Pull chord emergency stop with wire rope to be provided along the length of Augur for Emergency stop；
2) Audio / visual alarm system on the auger control panel which will be automatically activated once the power is switched on followed by the actual auger startup with a safety delay time. Audio / visual alarm system to be in the OFF mode after some time once the auger starts operation.


If you need decanter centrifuge, vertical cuttings dryer, feeding pump, screw conveyor, 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.

Drilling Mud Centrifugal Pump and Shear Pump for Europe Client

One batch of drilling mud centrifugal pump and shear pump are ready for delivery to Europe client.


Common Applications of centrifugal pumps on a Drilling Rig:

1.Feeding Solids Control Equipments: it works as feeding pump of desander cone and desilter cone
2.Mud Mixing and Agitation: Transferring drilling mud from a storage tank to a mixing hopper to add new bentonite or chemicals, or circulating mud in a pit to prevent settling.
3.Supercharging: Acting as a “charge pump” for the main triplex mud pumps. It provides a positive pressure at the suction of the main pump, preventing cavitation (a major cause of damage) and improving the main pump’s efficiency, especially when pumping dense muds.
4.Transfer and Loading: Moving mud from one tank to another or loading/unloading mud from supply boats or trucks.
Key Operational Considerations of the centrifugal pump:
• Proper Priming: The pump must always be flooded (full of liquid) before start-up. Running it dry will destroy the mechanical seal almost instantly.
• Wear Monitoring: Operators must regularly monitor the pump’s discharge pressure. A drop in pressure indicates that the impeller and/or volute liner are wearing down and need replacement.
• Cavitation Prevention: A “gurgling” sound and erratic pressure indicate cavitation, which is caused by a restricted suction (e.g., a clogged strainer or closed valve). This must be corrected immediately.


The features of GN shear pump:
1. It significantly enhance the hydration of moving soil particles
2. The shearing pump can provide shear efficiency accelerating the dilution and hydration of polymers.
3. It can make polymer shear dilution and hydration as soon as possible.
4. It can provide high discharge and head of delivery, which can meet the requirement of preparing and treatment of the drilling mud.
If you need other types pumps such as vacuum pump, submersible slurry pump, pls contact with GN solids.

GNLW454GT Mud Dewatering Centrifuge for Hydrovac Slurry Treatment

One set of GNLW454GT mud dewatering centrifuge package are ready for shipment to Hydrovac slurry treatment project.


GNLW454GT Decanter centrifuge technical specification is as below:
The bowl diameter is 450mm, the bowl length is 1890mm, the length/ diameter ratio is 4.2.The max bowl speed is 3452rpm, the max G force is up to 3000G. The main motor is 37KW / 45KW/ 55KW, the back drive motor is 11KW/ 15KW/ 22KW, the beach angle is 8.5 degree, The bowl main material is made of duplex stainless steel SS2205 by centrifugal casting, the screw material is made of duplex stainless steel SS2205, the screw is protected by tungsten carbide tiles, and the centrifuge is drived by positive pressurized VFD control panel with PLC touch screen and HMI interface. The bearing is premium SKF bearing for reliable and longer working life. The T series decanter centrifuge is mainly used for dewatering unit.


GN solids control design and manufacture waste management for hydrovac slurry treatment system. The working principal is to use solids liquid separation equipment to treat the slurry from vacuum truck of hydrovac project. The slurry is contaminant free which is from physical utility location in public right of ways, and directional drilling for replacement of underground pipes and construction.


A complete hydrovav slurry treatment system including waste catch hopper, coarse solids separation shaker with fluids catching tank, Fine mesh shaker , desilter and mud tank, dewatering decanter centrifuge and chemical dosing unit with centrifuge dewatering tank or telescopic skid. The decanter centrifuge and VFD control panel and feeding pump are all installed on the telescopic skid with fluids collection tank and a transfer pump.
Except for T series decanter centrifuge, GN also produce fully hydraulic drive decanter centrifuge, Y series separation decanter centrifuge, C series clarifying decanter centrifuge and three phase decanter centrifuge.