screw pump

This week 2 units of VFD decanter centrifuge ready for shipment to India for ONGC project in GN factory. The clients ordered 2 units of GNLW453C-VFD with screw pump for their solids control system with their customized painting color.


GNLW453C-VFD centrifuge with 18inch bowl and 61inch length, the max G force is up to 2578G, considering the high temperature in India, the positive pressurized VFD control panel with air conditioner for cooling, in some countries with environmental temperature less than 40 degree, the VFD control panel attached cooling tube for cooling. The frequency converter of the main motor, back drive motor and pump motor is all made of ABB brand, the other electric components are also world famous brand like Siemens/ schneider/ ABB, the motor and VFD control panel are all ATEX approval and suitable for 460V/60HZ, 3 phase and apply for zone 1 application.
Features of GN decanter centrifuge:
1) Different with other Chinese centrifuge manufacturer, GN use SKF bearings, since bearing block is the most important part for centrifuge, we use more reliable brand bearing to improve the centrifuge working life and reduce maintenance cost.
2) The screw is completely made of stainless steel, the impeller is protected by tungsten carbide tiles, the fluids distribution port is protected by tungsten alloy and interchangeable.

This week GN shipped one set of containerized drilling cuttings treatment system and several units of shale shaker to Russia. This is not the first containerized drilling cuttings treatment system sold to Russia, because of the low temperature in Russia area, the client do not want to stop operation in the long winter, this customized design is to keep the drilling fluids warm and prevent it from get frozen.


The containerized drilling cuttings treatment system including one unit of vertical G dryer with fluids collection tank, one mud agitator installed on top of the collection tank. The centrifuge feeding pump transfer the mud from fluids collection tank to the decanter centrifuge to separate more solids from the fluids, the final discharged solids can be reused for the drilling rig or used to prepare for new drilling fluids. The solids discharged from the vertical G dryer is with OOC < 5% like powder, they will be transferred by the screw conveyor to the cuttings box outside the container. One unit of 4kw screw pump is used as flashing pump of the vertical G dryer. The whole drilling cuttings system treating capacity is 40m3/h for oil based drilling cuttings, the decanter centrifuge with VFD control panel can be used to separate the fine solids from the fluids, the separation cut point is 2~5 microns.


The client also ordered several units of GNZS594 shale shaker with 4 panel composite material frame shaker screens, the screen size is 585x1165mm, the total screen area is 2.73m2, the G force is high up to 7.5G.

Drilling liquids has become broadly utilized in oil, gas drilling along with other drilling mud system. Using the solids control equipment, the drilling liquids might be recycled many occasions for cost saving and atmosphere protection. This short article gives an easy introduction around the purpose of the drilling liquids.

What’s the purpose of the drilling liquids?

1. Eliminating bottom from the well our prime pressure drilling liquids get out of the drill bit would flush the foot of the well make no obstacles for drilling process.

2. Carry cuttings – the drilling liquids would go ahead and take drilling cuttings to the floor surface for mud cleaning process.

3. Balance formation pressure – because of the very deep drilling, the drill bit can experience different formations for example rock formation and ground water formation. The drilling liquids here performed to avoid the floor water stepping into the drilling well. This could safeguard the geological structure.

Besides, the drilling liquids may also function to awesome lower and lubricate drill bit, safeguard borehole wall and supply downhole energy.

To completely have the drilling liquids advantages, you will find several needs around the drilling liquids.

1. The drilling liquids should meet interest in drilling mud recycling

Drilling cycle request the drilling liquids low pump pressure (low fluid viscosity), excellent capability to carry cuttings (dynamic pressure is high), low beginning pump pressure (low static shear pressure), good lube performance, low friction (less solids contaminants)

2. Keep up with the stability of borehole

It’s asked for to make use of drilling liquids column to balance the development pressure. So when drill oil and gas layer, the drilling liquids can also be required to balance pressure from the oil and gas. That will request a reliable density from the drilling mud.

3. Oil and gas protection

After drilling oil and gas layer, drilling fluid contacts with oil and gas. To avoid drilling fluid harmful the oil and gas layer, the drilling liquids ought to be small filtration, thin mud cake, low solid content and occasional filtrate of hydration etc.

4. Safeguard the character atmosphere

Drilling fluid frequently consists of oil and oil, diesel oil and a lot of chemical agents. To be able to avoid the possible effect on character atmosphere, non-toxic, harmless drilling liquids ought to be used.