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One unit of oil sludge treatment system for China client is shipped out recently, the design treating capacity is 15m3/h. A complete 15m3/h oil sludge treatment system made by GN solids control including vacuum pump unit, pre-mixing tank modular, shale shaker modular, chemical dosing unit, decanter centrifuge and 3 phase separation centrifuge modular. According to different material, we can provide customized design to add or remove the modular. The compact design in modular is for convenient operation and transportation.

  1. Vacuum pump is widely used to transfer waste oil, oil tank bottom cleaning sludge, drilling cuttings, drilling fluids, soils, sand, it is 100% air operated pump without electricity power.
  2. The vacuum pump transfer the oil sludge to pre-mixing tank modular, which with heating pipeline inside the mud tank to heat the oil sludge up to 60 degree. With chemical jetting and heating process, the emulsified oil can be easily treated and remove from the solids.
    For free oil sludge, it can be treated by shale shaker modular directly.
  3. The shale shaker modular with sealing cover and internal spray system is to separate the coarse solids from the oil sludge and reduce the solids content, it will protect the decanter centrifuge in the next step and extend the working life of the centrifuge screw propeller. If the solids content is too high, the screw propeller will be easily damaged; and the big solids will be easily block the centrifuge bowl.
  4. The decanter centrifuge can separate the fine solids from the oil sludge to reduce the solids content below 5%, by using proper demulsifier and chemicals, the separation cut point is up to 1 microns. The fluids treated by decanter centrifuge flow to the buffer tank then flow to the disc centrifuge, the disc centrifuge can separate oil, water and solids .

As a professional manufacturer of mud recycling system for HDD & CBM & TBM, our mud recycling system have been widely used for international big projects. Here are some typical projects case study:
Case study 1:
Project period: Year 2014 ~ 2019


Customer status: CHINA PETROLEUM PIPELINE BUREAU China-Russia gas pipeline Trenchless Project. CPP is the largest petroleum pipeline engineering company in China and the largest contractor for the China-Russia gas pipeline project. Over 20 units of GN mud recycling system are working for CPP projects. And 5 of these HDD mud recycling system are used in the China-Russia gas pipeline project.
Project status: The 3,000-kilometre (1,850-mile) pipeline, which was the world’s largest construction project ,will supply China with 38 billion cubic meters (1.3 trillion cubic feet) of gas annually when fully operational in 2025. Russian leader Vladimir Putin and Chinese counterpart Xi Jinping hailed the “Power of Siberia” pipeline as a symbol of cooperation.
Case Study 2:
Project period: Year 2016 ~ 2018
Customer status: Hong Kong Airport


Project status: HDD Trenchless mud cleaning and recycling for 5.2 KM Aviation fuel Pipeline installation. The mud recycling system specification including:
2 sets of 1500gpm mud recycling system, including 6 sets of GNZS703 Shale Shaker, 2 GNZJ703E-3S16N mud cleaner, 2 mud tanks, and centrifugal pumps and screw conveyor.
The working process of the mud cleaning system is : the submersible slurry pump feed the slurry to shale shaker, the coarse solids are separated out from shale shaker screens, the clean fluids dropped into shaker tank, the centrifugal pump feed the clean fluids to mud cleaner desander cone to separate solids bigger than 45 microns, the clean fluids dropped into desander compartment, the centrifugal pump 2 feed the clean fluids to desilter cone to separate solids bigger than 20 microns, the clean fluids are storage into the desilter tank.

This week GN solids control shipped one batch of solids control centrifuges for drilling mud treatment to Russia.
The decanter centrifuge model is GNLW363CG, which is the best sold model and the most popular model. The technical specification is as below:


Bowl diameter: 360mm ( 14 inch)
Bowl length: 1270mm (50 inch)
Design capacity is 200gpm, the normal capacity for drilling mud treatment is 132 gpm. The max bowl speed is 3900 rpm, the typical bowl speed is 3200 rpm, max G force is 3063G, typical G force is 2062 G, the separation cut point is 2 ~5 microns, by adding flocculants, the separation cut point is up to 1 microns. The differential speed is 38 rpm for high speed decanter centrifuge, for variable frequency drive decanter centrifuge, the differential speed is 0~45 rpm. The gearbox ratio is 57:1, main motor power is 50 HP, the back drive motor power is 15HP, the matching pump motor power is 11HP. For different material conditions, the actual treating capacity will be various.


The universal features of GN decanter centrifuge:
1) The bowl assembly is made of duplex stainless steel 2205, which lasts longer than SS304 & SS316L , the other bowl components are made of stainless steel 316L.
2) The screw is made of stainless steel by centrifugal casting, the open impeller design increase the treating capacity and improve the performance.
3) The fluids distribution port and solids discharge port are all protected by tungdten carbide alloy and it is replaceable.
4) The screw propeller is protected by tungsten carbide tiles, which is abrasion resistance material , and once damaged, the tiles can be replaceable.
5) The bearings are SKF brand which can last long time.
6) The main motor, and back drive motor are installed in one side for convenient operation and compact design.

Coronavirus disease (COVID-19) is an infectious disease caused by a new virus. Last updated: March 29, 2020, 09:58 GMT,Total Coronavirus Cases: 668,705,total death: 31,065, Recovered:143,107.

China also suffers huge losses from Coronavirus since January, 2020. People are suggested to stay at home for several week until the conoravirus is under control in China basically. Now all the Chinese are suggested back to work and recovery production and back to normal life, in the meanwhile, temperature checking is everywhere when you enter into a building or community, and movement tracking is necessary to be reported for quickly track the source of infection, and we are still required to wear disposable mask when you are in public area, including office. GN solids control are permit to recovery production partially since Feb. 20th, and until March 15th our production is recovery 100% as per government’s instructions.
As one of the top manufacturers of solids control equipments and drilling waste management equipments in China, GN solids control is also worked as a responsible company, we keep goods reputations during the past 10 years , and we got repeat orders from our valuable clients every year. Many clients from countries and regions with Coronavirus severe epidemics request us for Masks, it becomes more and more difficult to buy masks in their country. To support our VIP clients in the most tough period and flighting coronavirus together, we can provide Free Medical Face Mask for our clients in the world. If you need medical disposable masks, pls contact your direct sales or email to sales@gnsolidscontrol.com for Reservation.


GN solids control is trying our best to finish the existing order and ship them as soon as possible, also we are preparing stock for the most popular equipments like shale shaker, decanter centrifuge, vertical cuttings dryer, shaker screens frames( so that we can fastly finished the composite material shaker screens orders).

Recently GN solids control shipped mini decanter centrifuge of solids liquid separation to South America clients. The mini decanter centrifuge can be widely used for the applications as: waste water treatment, diamond core drilling slurry treatment, and other solids liquid separation project. We have 2 different models of mini decanter centrifuge for option, the technical specification is as below:


GNLW223D, the bowl diameter is 9 inch, bowl length is 26.4 inch, max speed is 4500rpm, normally we use 3800rpm to archive 1777G, the separation cut point is 2 ~5 microns, gearbox torch is 500N·M, this decanter centrifuge is normally used for core drilling solids removal unit, the SRU including mini shale shaker , mini decanter centrifuge ,feeding pump, transfer pump, mixing hopper, mixing pump, mud tank, slurry collection pump and pipelines. It can treat the slurry and recovery water, the client can save water consumption and save drilling cost.
It can be also used for oil sludge separation system, GN compact design oil sludge treatment unit is a 1m3/h oil sludge treatment system, including mini decanter centrifuge, 2 panel shale shaker, pre-mixing tank, oil sludge collection tank, centrifuge feeding pump, disc centrifuge, butter tank, oil storage tank, water storage tank, chemical dosing unit.


GNLW224EP-VFD, with same diameter bowl 9 inch, the bowl length is 36.4 inch, max speed is 5000rpm, the normal speed is 0~4500rpm, the max G force is 3077G, typical G force is 2492G, the gearbox ratio is 95:1, gearbox torch is 1400N.M, this model centrifuge with longer bowl length, and higher G force, it is suitable for waste water treatment, by working with flocculants, the decanter centrifuge can separate the ultra-fine solids from the waste water, so that it is qualified to be treated by chemicals in the next process.
For more information, pls contact GN solids control.