GN SRU (Solids Removal Unit) for diamond drilling
GNLW223 Series decanter centrifuge is specially designed for small capacity, small footprint , and for fine solids separation Bowl material of GNLW223 Series decanter centrifuge is made from SS 304 by centrifugal casting. The screw on the centrifuge bowl are protected with Tungsten Carbide Tiles for anti-abrasive and for longer lifetime.
GN SRU (Solids Removal Unit) is a closed loop fluids system that recycles the drilling fluids for mineral and diamond drilling. Capacity of GN SRU (Solids Removal Unit) is 150L/Min. The SRU significantly reduces the environmental impact and greatly improved the drilling operation efficiency. GN SRU (Solids Removal Unit) includes a small shale shaker and the small size decanter centrifuge GNLW223 series. Cut point of 150L/Min GN SRU (Solids Removal Unit) is 2-5 Microns.
GNLW223 Series decanter centrifuge is a 8inch small size decanter centrifuge, it is the corn product in GN Solids Removal Units (Smaller versions for Diamond Drilling).
The reason there is a small size shale shaker is that, the shale shaker is used to remove the big size solids and reduce the mud weight, than to protect the centrifuge. The big size solids will wear out the centrifuge bowl or even block it. And the max. solids content for centrifuge should be less than 15%. Heavy solids content will reduce the separation efficiency.
In some cases, there are no large solids as Diamond drilling is implemented from the beginning of the hole. So in some cases, clients will do not want small size shale shaker, they will only want the small size centrifuge for diamond drilling.
Besides the small size 9 inch centrifuge for diamond drilling, GN Solids Control makes other bigger size decanter centrifuges with different standard for different applications: the most popular size 14 inch, big bowl 18 inch, 22 inch and the largest bowl size 30 inch.
Difference between CNEX, ATEX and IECEX Explosion Proof
There are many different standards for explosion proof certificate for motors, control panels and electrical components (VFD drives, EX air conditioner, cable gland, socket and plug, etc…). Many clients do not know the difference and they do not know how to choose the right standard for the project.
Below is the most popular EX standard we mostly know:
1) CNEX is China National Explosion Proof standard; this can be used in China and many other countries. CNEX is an approved certifying body according to IECEx which is the leading authority in the world for ensuring standards are met and maintained. CNEX are registered as a ‘Certification Body’ (CB) by IECEx and they are authorized to certify and put their mark on equipment.
Except USA, Europe and Australia, most of the countries include Middle East countries and Africa countries they accept CNEX. We have sold our CNEX equipment to Oman Kuwait Qatar UAE , Iraq. You can learn more about CNEX standard here:
http://www.china-ex.com/english/aboutcnex.html
2) ATEX is a Europe explosion proof standard. It can also be used in many other countries out of Europe. But ATEX is normally not accepted in Australia, USA etc.
3) IECEX is International Electrotechnical Commission Explosive standard. But many Europe countries clients do not accept IECEX. They only accept ATEX. You can learn more about IECEX standard here:
http://iecex.com/information/about-iecex/
And there are many other explosion proof standards especially for certain countries, like TP TC certificate for Russia. UL standard for America, but UL is also accepted in some other countries.
However, the standard selection is also depending on the end user and the third party for inspection. Even in the same country, different end user has different standard. Or even for the same end user for different project, they have different standard. Like KOC only accept IEC for deep drilling, but for workover rigs, or small rigs, other EX standards maybe accepted.
So clients who intend to order equipment for hazardous areas need to make choice depending on the end users who they are dealing with, and what the end user want.
For the same model motors from the same suppliers, maybe it complies with ATEX certificate, CNEX certificate, and IECEX certificate, and UL certificate. Even the model and product is the same. If the requested certificate standard is different, the prices are different, and nameplate is different, and QA/QC documents record in the manufacturing company are different. And the nameplate cannot be changed after delivery from the OEM factory. It is not allowed by the Certification Body. Otherwise, the certificate will be canceled.
GN Vacuum Slurry Pump Units for long distance mud transfer in a Beijing big project
This week, a big quantity of vacuum slurry transfer pump unit has been ready for shipment. The big quantity of vacuum slurry transfer pump unit is prepared for a big project in Beijing for big capacity material and for long distance transfer.
GN vacuum slurry transfer pump is also named as waste vacuum pump, or solids transfer pump. It is a 100% air driven slurry transfer vacuum pump for liquid, slurry, and solids transfer. GN vacuum slurry transfer pump is with a special structure design, it can be used at tough environmental for high solids content and big solids size transfer. The vacuum slurry pump is with the features of high working performance and less maintenance. The vacuum slurry pump can be used to transfer material with high gravity and high density, solids content max. up to 80%. Another advanced feature is that GN vacuum pump can be used for long distance transfer. The max design transfer length can up to 1000m. 
The client is looking for transferring units to suit for long distance material transfer for a long time. Once they met GN Solids Control on Beijing CIPPE oil and saw the jobsite video of GN vacuum slurry transfer pumps, they are surprised by the wide application range and the up to 1km away transfer distance. As they did not use the vacuum slurry transfer pump, in order to confirm that GN vacuum slurry transfer pump can suit for their application, they rent a pump for trial. After jobsite test, they are confident with GN vacuum slurry transfer pump and confirmed the order to GN. 
In the first order, they requested 8 units vacuum slurry transfer pump. Every 4 vacuum slurry pump units are fixed inside a modified 20ft container for easy movement and good protection. All inlet pipes, outlets pipes and air feeding pipes are fixed well on the modified container.
Besides vacuum slurry pump, GN Solids Control can make other full line equipment for mud solids control and drilling waste management, such as shale shaker, mud cleaner, decanter centrifuge, shake r screens, etc….