Rotor assembly is the rotating part of vertical cuttings dryer. There are scrapers between the rotor and screens basket to help for solids removing. So the scrapers are wearing parts. Manufacturer will suggest to change the whole rotor assembly with a full set scrapers. Many customer cannot understand, why the rotors are not wearing parts, but have to change together with the scrapers?

The reason is that:

The scraper is with a curved surface. Although it is a precision casting, it has machining deviation. There are mounting holes on the scrapers after casting. The rotor is also a curved surface, and the rotor itself has no standard mounting holes for scrapers.
During assembly, put the scraper on the rotor to find the best place where the curved surface of rotor and scraper can touch well, and then drill holes on rotor for fixing. After 8 scrapers are fixed to the rotor, the whole unit will be machined and do dynamically balance. Because both precision casting and assembly have deviations. Therefore, the mounting hole positions on every rotor will be not the same. And the dynamic balance can only fit the original scrapers which delivered together from the factory. That’s why the scrapers and rotor must be replaced together.

If operators want to only replace the scrapers but use the old rotors, they will need to find a workshop with vertical lathe to machine the scrapers to ensure the equal gap between scrapers and basket. and make balancing for the whole unit.

The method of using flat washers to adjust the gap between screen and rotor may solve the problem of installation. But the gap between screen and rotor maybe not equal. Do balancing will be another challenging.

It is high speed rotating equipment. If the rotor assembly is not in balance. It will cause abnormal vibration, it may damage the machine, or even cause dangerous.

GN Solids Control makes vertical cuttings dryer to treat oil base mud cuttings discharged from shale shaker. The fine soil discharged from decanter centrifuge cannot be treated by vertical cuttings dryer. As the screen opening of vertical cuttings dryer is 0.25mm, 0.35mm and 0.5mm. But decanter centrifuge cut points is 2 ~ 5 microns. It is used to remove very fine solids. The screen opening is vertical cuttings dryer is too big to the decanter centrifuge soil.

GN Solids Control can offer full package vertical cuttings dryer together with electrical control panel, telescopic skid and Cantilever crane system for screens changing.
1) GN Solids Control equips an adjustable Cantilever crane with 0.5T Hand chain hoist for vertical cuttings dryer screen changing.
2) The vertical cuttings dryer skid designed by GN Solids Control can be adjustable to lower down for transportation, and it is also it’s easily Rotatable. GN Solids Control design vertical cuttings dryer skid is heavy duty. It is to make it more reliable and easy for operation. It is complete with walkway, handrails, stairs and connections between the vertical cuttings dryer and flush pump.
3) GN Solids Control can also equip a small vibration motor system under the vertical cuttings dryer skid to help for the solids discharge. Mostly GN Solids Control does not equip the vibrator motor system. As the solids discharged from vertical cuttings dryer is with very lower liquid, it is very dry, like powders. It is optional function. GN Solids Control can offer the vibrator motor system in case clients want it.
After the vertical cuttings dryer, GN Solids Control can offer high speed decanter centrifuge with telescopic skid or catch tank, and feeding pump for the centrifuge.

Furthermore, GN Solids Control can offer screw conveyer system under the solids control shale shakers to collect drilling cuttings and transfer to vertical cuttings dryer for separation. GN Solids Control can also offer screw conveyor auger system to transfer the dry cuttings discharged from the package.

A full package of 1500HP oil drilling rig mud solids control system package will be ready for delivery this week. GN Solids Control assembly the whole system for final running test and inspection. After that, all processing equipment and guardrails will be removed from the system for packing, and delivery to sea port for sailing to customer from Indian.

The system does only content of 1 set of processing tank, but including following full line solids control equipment. The other suction tanks, mixing tanks, storage tanks will be built locally. It can save shipping cost and shorten the total delivery time.

The 1500hp mud system including all solids control equipment as below:
Firstly, there is a mud gas separation, model GNZYQ1000. The mud gas separate will be connected to client’s choke manifolds and to remove the gas for safety.

And then 3 sets linear motion shale shaker are equipped for the 1rst stage solids control processing. The shaker model is GNZS703F-HB, 3-panel shale shaker equipment with composite material shaker screens for longer lifetime, and with back type feeding box.

1 set of GNZCQ360B large vacuum degasser is equipped after the 3 shale shakers. It is used to kill the fine gas bubbles before enter into mud cleaner in order to protect the hydro cyclone separator.

After vacuum degasser, there is a set of GNZJ703F-2S12N mud cleaner. It is a 3-1 separator for the 2nd and the 3rd separation. The mud cleaner is combined of a same model 3-panelshale shaker, 2 ea desander cyclones and 12 ea desilter cyclones.

The desander and desilter cyclones will be fed by 2 ea 75hp centrifugal pumps.
Futher more, a 11kw trip pump is located in the system. A set of EX control system is with controls for all mentioned equipment.

GN Solids Control is also a leading screen manufacturer. GN can offer high quality replacement screens to customers for both GN own design shale shakers or other popular brand shale shakers.

The equipment and system used together with the drilling rig to clean and recycling drilling mud is caused as drilling fluids solids control equipment and solids control mud system. Its principle is liquid and solids separation.

During the drilling process, the dirty drilling fluid exits the wellbore through a flow line and be charging to the solids handling equipment for solids control. After removing the unqualified bigger size particles, the mud is cleaned and fed into the wellbore via the suction tank through high pressure mud pumps. The equipment is arranged in the right way to remove successively smaller particles during its processing.
A full function drilling fluids handling system will including below tank unit:

1) Firstly, there will be a trip tank section, it is an associated system for gauging pipe displacement during tripping operations. It is normally equipment with a small power trip pump, an mud agitator, and a small volume tank less than 10 cbm.

2) The shale shaker tank / separation tank section is the major part of the mud processing system. The tank(s) and associated relative equipment is used to remove useless solids and recovery useful drilling fluid from the handling process.

3) Discharge tank unit, the tank(s) or pit(s) and equipment located at the well site used to store and process drilling fluid and cuttings for disposal.

4) Reserve tank unit, the tank(s) or pit(s) and associated equipment used to isolate drilling fluid from the active system. The mud mixing system is normally equipment on/together with a reserve tank, and it is qualified to mixing to any of the clean mud tank compartment.

5) Suction tank unit, it is the tank(s) from which the high pressure mud pumps take suction, and any associated pumps or mixing equipment.

The popular solids control and handle equipment are as following:

1) Shale shaker is the most popular and widely used equipment for drilling fluids liquid and solids separation.

2) Mud cleaner, desander and desilter. They are the 2nd and the 3rd stage solids control equipment after shale shaker separation.

3) Decanter centrifuge is the 4th stage solids control equipment for barite recovery or fine solids separation to reduce the mud weight.

4) Degasser device (vacuum degasser or centrifugal degasser) is used after shale shaker but before hydra cyclone separation.

5) Jet mud mixing system is combined of mixing hopper and mixing pump. It is used to prepare qualified drilling fluids for the rig mud system.

500GPM is the most popular size mud recycling system for HDD (Horizontal Directional Drilling) rigs, water well drilling rigs and CBM (coal bed methane) machines. Every year, GN Solids Control will provide around 10 sets complete mud recycling systems to SINOPEC non-oil drilling divisions for their piping projects. Most systems are equipped for 500GPM capacity for SINOPEC domestic and international projects.

This week, a new 500GPM mud recycling and water system have been ready for SINOPEC pipeline projects. It is a high standard HDD mud recycling system including bellow processing equipment:

1) The 1rst stage processing equipment is a linear motion shale shaker GNZS70F. It is a 3-panel shale shaker utilizing big size composite material screens for long lifetime, big non-blanked areas and better conductance. As a leading solids control equipment manufacturer, GN Solids Control is also a top manufacturer for high quality composite material screens for all GN shakers and for most of the popular shaker models from other brands. All GN screens are conforms to API RP 13C to ensure a precision separation.

2) Mud cleaner GNZJ703F-1S8N is used as the 2nd and 3rd separation equipment. The mud cleaner is a combination of under flow shale shaker, 1× 10 inch desander separator, and 8× 4 inch desilter separator. The desander and desilter cyclones are fed by centrifugal pump respectively.

Dewatering centrifuge

3) There is a high speed decanter centrifuge GNLW363C-VFD associated in the 2nd tank. The clean mud from desilter is transferred by a submersible slurry pump and feeding the high speed decanter centrifuge for dewatering.

It is a 2-tank mud recycling system. The shale shaker, mud cleaner and mud cleaner feeding pumps are associated on the No.1 tank as processing tank. Dewatering centrifuge and its feeding pump are located on the 2nd mud tank. Furthermore, there is a screw conveyor under the solids discharge port of dewatering centrifuge to transfer the soil from centrifuge to waste containers.

The whole system will be dispatched to SINOPEC pipeline division company very soon.

Many customers are interested in dual voltage equipment, they prefer dual voltage mud agitator, dual voltage shale shaker, dual voltage decanter centrifuge, dual voltage sand pump, dual voltage slurry pump. And dual voltage motor starters. In this case, they can use the same equipment for different power system project in case they need it.

Mostly in China the solids Control and drilling waste management equipment are designed for single voltage power system. As the dual voltage motor is not popular in China. Few companies can make dual voltage motors. It is hardly to find the reliable suppliers. There are some European and U.S brand offers dual voltages motors, but price is much higher. Normally, it is 2 or 3 times higher than the normal Chinese brand single voltage motors. It will be more cost effective for clients to buy another set of motors as backup.

decanter centrifuge and shale shaker 

If clients really want the equipment suit for dual voltage and suits for both 50hz and 60hz power system, GN Solids Control will recommend them to buy equipment per 60hz power system. In case they use the 60hz motor in 50hz power system, like for both 460V/60HZ and 380V/50HZ. The equipment rotating speed will be lower from 60hz to 50hz. Theoretically the lifetime of the 60hz motor running at 50hz will a little bit shorten the lifetime. But it will not shorten much. Compared with the big price margin on dual voltage motors, it is much more cost effective.

But the 50hz motor equipment is forbidden to use for 60hz system to avoid over speed and damage the equipment, or to cause dangerous.

For motor starter (electrical control panel), it is not problem to make it for dual voltage, like to suit for both 460V/60HZ and 380V/50HZ . The control panel will suit for both 50hz / 60hz. So you can use the agitator for 380V/50HZ. There will be a transformer on the control panel. And there will be a switch on the panel. Operators will shift the control between 50hz and 60hz by moving the switches.

There are many different types of shale shaker models. Every shaker has its own design for shale shaker screens. Even for the same shale shaker brand, they may have different screen design for different serial shale shakers. And the screens are not interchangeable in most cases. How to ensure that you order the right screens for your shale shaker?

1) Firstly, you have to ensure your shale shaker screens are hook type or frame type. Like all Derrick shale shaker screens are hook type. While Mi-Swaco, NOV Brandt and Fluids System shale shaker screens are frame type. For the popular shale shaker models, once you mentioned your shale shaker model, the screen supplier should know what is the right replacement screens for your shale shaker, like for Derrick FLC serials shale shaker, MI-Swaco Mongoose serials shakers, Brandt Cobra shakers, GNZS594 shakers.

2) Secondly, there are flat type screens and Pyramid screens. Pyramid screen is an old fashion. During that time, the manufacturing technology is very limited. So people been told that the Pyramid screens can offer more usable screen areas. So in many case, Pyramid seems popular. But actually, the pyramid screen lifetime is normally not as reliable as flat screen. And in fact, mostly the drilling fluids cannot go up to the top of the screen pyramid. So PMD screens cannot enlarge much screen usable areas. Now with the development of screen manufacturing technology, the composite flat screen can offer a bigger usable screen area compared with the old processing.

3) After you confirm which screen models you need for your shale shaker, it means the screen dimension are confirmed. It ensures the screens can fix for your shale shaker. Then you have to choose the right screen opening for your applications. API size is the most popular and the international standard to definite screen opening. For different screen manufacturers, the same API size screen means the same screen opening range, it is interchangeable.
Sometimes, people may mention mesh size for screen, But it is not actual. Mesh relates to a piece of woven wirecloth, is a measure of the number of holes in a linear inch (such as 100 mesh) or in a linear inch in each direction (such as 100 x 60 mesh). It has no meaning to the screen openings.

MI Swaco Screen Pulse system and GN Solids ViST Vacuum Shaker screen are both designed for enhance the performance of the shale shaker to recovery drilling fluids. Generally speaking, the function of the two system is same, the working principle and process is different. MI Swaco has it’s own patent and GN Solids ViST also has it’s own patent design.

Both system can be used for oil based mud, water based mud and SBM.

About the MI Swaco Screen Pulse Technology
The MI Swaco SCREEN PULSE fluid and cuttings separator is a vacuum system to enhance shale shaker performance by creating a suction effect under the screen surface, reaping all the benefits of ultra-fine screen separation efficiency. A catch pan will be installed as a drop-in, within the shaker bed underneath the last screen on the shaker; an air valve mechanism is attached to the catch pan and creates vacuum suction force, pulling all the residual drilling fluid from the drilling cuttings surface as they travel towards the discharge end of the shaker.

About GN Solids ViST Vacuum Shaker Screen

ViST is Vacuum Screen Technology is to work with shale shaker to reduce drilling waste and recycle drilling fluids.
ViST was pending patent design developed by GN Solids Control from June, 2017. In May, 2018, GN tested ViST with drilling fluids. It proved to be very efficient for recycling drilling fluids.
The ViST Pan is installed under the last screen or mounted externally. And a suction hose is connected to ViST vacuum unit. The compressed air from air compressor or the rig air supply is required to create suction on the last screen surface, pulling additional fluid off the cuttings. It can reduce the liquid on the cuttings by 30-50%.

Main difference between MI Swaco Screen Pulse and GN Solids ViST Vacuum Shaker Screen .

Firstly, the Mi Swaco Screen Pulse System utilize a special valve mechanism to create vacuum for the catch pan. But GN ViST vacuum shaker screen use a vacuum pump unit to create vacuum for the catch pan.

Secondly, the Mi Swaco screen pulse system collect the drilling fluids and discharged directly to the mud tank by the valve mechanism. But GN ViST vacuum shaker screen collect the drilling fluids and sent to a vacuum unit, and pushed out by the compressed air.

Learn more about GN ViST Vacuum Screen Technology from following link
http://www.gnsolidscontrol.com/vist-vacuum-screen

GN ViST screen vacuum unit is designed to used together with shaker screen. As it is as new technology, many clients are not familiar with it, the unit is named as screen Vac. Unit. They wonder if it is screens. The Screen Vacuum unit It is not screen. But the Vist vac screen unit must be used together with shale shaker screen. It should be fixed underneath the discharge end shaker screen of the solids control shale shaker.

GN ViST screen vacuum unit can be used for both OBM and WBM. The screen vacuum unit can be used to replace high G drying shaker.

Why clients want GN ViST screen vacuum unit to replace High G shale shaker ?

1) The first advantage of screen vacuum unit is less maintenance and no consumption wearing parts. As we all knows, high G shale shaker is also easy for maintenance, but it will consume replacement screen once they start to working. ViST screen vacuum unit does not have the problem. It can save operation cost.

2) As the screen vacuum unit is mounted underneath the existing shale shaker screens, it is driven by a control unit with small footprint, and the screen vacuum unit do not need extra holding tank, or transfer pump, it can save space and power at jobsite especially for offshore platforms.

3) The screen vacuum unit is a 100% air driven system. It suits for hazardous areas for safe application.
Below are some normal questions from clients and the answers from GN Solids Control about GN ViST screen vacuum unit.

Question 1: Can the GN Sludge Pump be directly gravity fed by hopper or auger, or is it suction via hose as only feed option ?

GN answer: It can be directly gravity fed by hopper or auger. It can also suck via hose as feeding option. It is driven by air.

Question 2: Can the ViST screen vacuum unit are most suitable for oil base mud or water base mud?

GN answer: GN ViST screen vacuum unit can be used for both oil base mud and water based mud.

Recently, GN Solids Control is a specialist for mud solids control and drilling waste management equipment. GN Solids Control is capable to offer customized solutions to different waste management applications.

decanter centrifuge and shale shaker in stock

Below is one of the projects GN Solids Control offered solutions?
1. The origin of waste: refinery oily sludge.
2. Make of waste: % water crude oil + sand.
3. Max solid size: n/a sand stones.
4. Volume to be treated: 30,000 cubic meters, 60,000 metric ton
5. How long time to process the materials: approximately 50 ton per day is suitable.
6. What is the challenge: to extract clean crude + heating oil.
7. The target to achieve: crude oil + furnace.
8. Usage: energy.
9. The existing process: skimming.
10. The present tech: bio – remediation.
11. Photos of projects: to be supplied.
12. When will the equipment be needed: as soon as possible.
13. info we need : our target is a to extract clean crude oil + heating oil so the question is how perfect is your tech in order to achieve our goal at the same time getting a clean soil that environmentally acceptable?

GN solution is mainly design for waste management treatment, because they have higher discharge result request for oil/water/solids separate.

Below is working processing for oily sludge treatment. The system is mainly used to separate solids and cuttings in different sizes and gravity.

The major equipment :
1. Firstly, shale shaker will be used to separate solids parts bigger than 2mm
2. Decanter centrifuge is a 2-phase separation machine. It is used to separate fine solids from liquid after shale shaker. It is used to reduce the solids content.
3. 3-Phase centrifuge can be used after decanter centrifuge. The 3-phase can be used to separate water, oil and solids.
As decanter centrifuge and 3-phase centrifuge are both physical separation machine, they can only remove solids by solids size and gravity. Chemical dosing system can be used together with 2-phase and 3-phase centrifuges to add flocculants and remove ultrafine solids.