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.

Shale shaker is the traditional process for the drilling mud recycling and separation. And the shale shaker is also the most popular processing equipment to treat drilling fluids. It utilizes shale shaker screens with different screen opening to remove cuttings and sand. The unusable cuttings and sands bigger than the screen opening cannot go pass the screen and will be discharged from the shale shaker separator, while the usable drilling fluids smaller than screen opening will go pass the screens and falls down to the holding tank under the shale shaker.

Dual tendam shaker

Most people may be not familiar with the Mud Cube technology, which is a technology developed by some company. Mud Cube technology is intended to replaces conventional shale shakers. There seems to be interest in the technology in many countries. The Mud Cube technology has its advantages. It can suit for some kind of drilling mud, but not suit for all kinds of drilling mud. And the cost and maintenance cost of mud cube is very high as the reason of its complicated design.

ViST Vacuum screen is developed by GN Solids Control. It is a vacuum screening unit using vacuum to recover usable drilling mud. It is not to replace traditional shale shaker. It is designed to use together with traditional shale shaker. There will be a holding hopper underneath the shaker screens of the shale shaker, and suction the usable drilling fluids with the vacuum power.

As shale shaker is still the most popular and cost effective solution, there are many popular brand for shale shakers, like Derrick, Swaco, Brandt, Fluids System, Elgin, GN Solids Control. And there are many different designs of shale shaker to suit for different applications. According to the screen Quantity, there are 2-panel shale shaker, 3-panel shale shaker, 4-panel shaker. According to the shale shaker quantity, there are single deck shale shaker, double deck shale shaker and 3 deck shale shaker. 3-panel and 4-panel single deck shale shaker is the most popular application.

GN Solids Control makes high quality composite material replacement screens for most of the popular shaker models.
Compared with the traditional metal frame screen and the dip process, composite material shaker screens are with more advantages. Its lifetime is more than double, and the manufacturing process is more environment friendly. The metal frame shaker screen and the dip process shaker screen can only stock for 1 year or max. 2 years. They are easy to become aged. But the composite material are made from fiber glass plastic, which can last for long time, the composite screen can be stocked for 5 years, and the plastic material can be recycled.

Besides above advantages, GN Solids Control offers rubber sealing plugs to repair the composite material shaker screens. In many cases, there is only small area wire mesh broken, but the screen frame and most areas are in good condition, after repairing the screen with GN rubber sealing plug, the screen can last another some days.
Below is the procedures of how to repair screens with GN rubber sealing plugs.
Step 1: Cut the broken mesh square hole by knife, ensure the cut edge to be flat and smooth, the hole edge mesh burr should be no longer than 1.5mm.
Step 2: Install Rubber sealing plug as show as the photo, from screen front side to bottom side. Use hammer carefully to make sure the rubber plug insert into the screen hole completely, but not damage the screen wire mesh.
Step 3: Plug top surface should not higher than screen surface. When the rubber plus inserts to the screen frame properly, it should be 1 ~ 2 mm lower than the screen wire mesh surface.
As the screen frame designs are different, some screen models may have more than 1 kind of rubber plug. Below is the rubber plug quantity for most of the popular shale shaker screen models from GN Solids Control:
1.1 Only request 1 kind plug screen model：T585、TMD3、BVS1、BVS2
1.2 Need 2 kinds of plug screen model：B380、B635、F737、G70F、G70E、G70D、G75F、G75E、G75D
Example:
As show as below photo, hole A an hole B are for the same screen model, but with different dimension. Choose the right size plug to repair screens.

Recently, a client contacted GN Solids Control to inquire for a Fixation compact unit on the trailer. The client want the Cutting treatment plant to be a Mobile Solidification Unit. The Mobile Solidification Unit will content 2 modulars:

The client want the first modular includes following:
1) 1 set flat tank with 1 set agitator and 1 ea mud gun.
2) 1 slurry centrifugal pump to circulate on closed loop
3) 1 shale shaker on top of the tank to remove solids

Automatic Drilling Cuttings Solidification Unit for CNPC Project

The client want the second modular includes following items:
1) The shale shaker from the first modular will discharge solids into the second compartment.
2) 2 boxes (1 for cement and 1 for lime storage) dropping mix into one compartment for solidification
Based on clients request, GN Solids Control recommended below items and equipment

For skid #1 GN Solids Control recommends:
1) 1 ea slurry tank 15m³, dimension can be 5×2.2×2.15m. In this case, the tank can be put into container for international shipment.
2) 1 ea 4-panel shale shaker model GNZS594F-SHBF (http://www.gnsolidscontrol.com/shale-shaker)
3) 1 ea 11kw (15hp) mud agitator, model GNJBQ110-DD, with double payer impellers and tank stabilizer at tank bottom.
4) GN Solids Control company does not recommend mud gun, as there is no pump line in the slurry tank, there is no feed for the mud gun. It cannot be used.

Besides all above equipment, GN Solids Control recommend a transfer pump to feeding for the shale shaker, transfer the slurry from the tank to outside system. The exact pump power depends on client’s request, normally, a 11kw or 7.5kw slurry pump should be fine for the drilling cuttings treatment plant.

2) 1 EA 36ft screw conveyor GNSC14A-36 can be used to collect cuttings from shale shaker and feed to the modular #2 solidification unit. http://www.gnsolidscontrol.com/screw-conveyor

3) For modular #2 the solidification unit, GN Solids Control recommends his drill cuttings solidification unit:
Client will only need the Lime storage tank & mixing tank skid. They do not need the drilling waste collection hopper and auger.

Recently, GN Solids Control got inquires from clients for the drilling cuttings treatment. Below is the client’s request.
They are proposing to use the cuttings blowing pump for drill cuttings transfer and disposal from an offshore jack up rig to a dedicated barge. The clients want to treat both OBM and WBM contaminated cuttings.

In addition to this, they will require some other equipment as follows:
Cuttings storage system: Bulk storage and retrieval systems 150bbls discharging at 30mt/hr
315hp, 1260cfm 150psi twin air compressor if available
100HP vacuum unit for spill containment (750 gal volume and 1600cfm flow)
40tph vertical cuttings dryer (DRY TO BELOW 5% OOC RATIO)
And they give note that it is of great importance that all equipment must be explosion proof.

Based on the client’s need, our sales people keep communicating with them for a suitable proposal for them.
The cutting transfer way can be effected by vacuum pump or screw conveyor. Vacuum pump is widely used to transfer oil sludge, 100% air running/operation, it can use for some special jobsite
Vacuum pump running video link, FYI: http://www.gnsolidscontrol.com/video/gn-drilling-cuttings-or-sludge-vacuum-transfer-pump-working-video

We have triple skip station to collect and transfer cuttings, and send drawings to clients for reference. Screw conveyor is another way to collect and transfer cuttings from mud processing equipment to the cuttings storage equipment.

And vertical cutting dryer is GN advantage. The Vertical cuttings dryer is mainly used to treat OBM cuttings. For WBM cuttings, GN recommended to use High G-Force drying shaker instead of vertical cuttings dryer to separate. GN attached some complete cutting management solutions for reference. And clients can also check jobsite videos on GN website.

GN Solids Control is leading manufacturer on solids control and waste management equipment. GN is also manufacturers for different models replacement screens. GN owns factories in Beijing China and have a big warehouse in Houston. Clients can visit GN website or contact GN sales team to get support.

GN Oil Sludge Treatment System is to use chemical to wash the oil sludge  with heat to temperature of 60-70 C degree. After washing the oil sludge  is pumped to  GN separation equipment to separate into oil, water and solids. The recycled water can be reused in the washing process which save a lot of cost to reduce the consumption of clean water, and the oil is clean enough to sell to the refinery company, the solids contain oil between 2%-3% which can be sent to biodegradation or thermal unit for final disposal.

The main components for oil sludge treatment include slurry transfer pump, pre-mixing slurry tank, primary shale shaker, decanter centrifuge, 3 phase disc vertical centrifuge, chemical dosing system, storage oil tank , storage water tank.

• Slurry Transfer Pump: The vacuum pump can be used to pick oil sludge from the pit and feed to the pre-mixing and heating tank. At this stage, chemical dosing system will feed chemical the mixing tank to improve the separation of the oil water and solids.
• A submersible is used to pump the slurry to feed to primary shale shaker for separation of coarse solids from the oil sludge.
• The screen on the shale shaker normally use 2 mm opening screen, after separation by shale shaker, a second pump which is a screw pump will pick up the fluids with fine solids and feed to the decanter centrifuge. The decanter centrifuge is the core equipment for the oil sludge treatment.
• After decanter centrifuge, the relatively clean fluids will be sent to a 3 phase disc centrifuge to be separated to water, oil and fine slurry.
• Later on, the water can be used to washing and mixing the slurry, the recovery oil will be sent to the oil storage tank.
  

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You can visit our website www.gnsolidscontrol.com to learn more information of oil sludge treatment decanter centrifuge.

According to the deck quantity of shale shakers, there are different forms of shale shakers:
1) The most popular is single deck shale shaker, for example: GNZS703, GNZS752, GNZS594 shale shaker, Derrick FLC 2000, FLC 500, DP 600 and Hyperpool series shale shaker, NOV Brandt Cobra, King Cobra, Mini Cobra, Venom and D380/D285P shale shaker, MI-Swaco MONGOOSE PRO, MONGOOSE PT & MEERKAT, ALS series
shale shaker

Dual tendam shaker

2) Double deck shale shaker is also popular as the obvious advantages on performance. For example: GNZS705, GNZS706, GNZS753; Brandt LCM-2D, MI-Swaco MS-2, and so on.
3) There are also many 3-deck shale shakers, like Brandt LCM-3D, MI-Swaco MS-3, NOV Brandt VSM300 series, etc…
The most popular shale model is single deck, as it is easier for operation and maintenance. Double deck shale shaker is also popular as the obvious advantages on performance. Below are some of the advantages of double deck shale shaker.
1) With the same bottom screen areas, the double deck shale shaker can handle more capacity. The double deck shale shaker can utilize big opening screens on the top deck for pre-separation, and then use a normal size or even finer size on the bottom deck.
2) The double deck shale shaker means 2-step separation, it can recovery more drilling fluids and it is more clean. With the same handling capacity, the top deck can remove the bigger size cuttings, and then the bottom screens can use a finer size screens for a better separation result.
3) Although the double deck shale shaker owns more screen quantity per unit, but as on the top deck, operators can use big opening steel screens to remove big cuttings, the big opening steel screens can last for a much long time compared with traditional wire mesh screens. And as the big cuttings will be removed by the top deck steel screens, it can protect the bottom wiremesh screens. The total screen cost for operators may be lower.
Although the double deck shale shaker has obvious advantages, but it is still not as popular as the single deck shale shaker. Why? The main reason is that, as there is a screen deck on top of the bottom screen deck, operators cannot easy observe the damage of the bottom screens, and operators have to remove the top deck screens in order to watch the situation of the bottom deck screens or to replace the bottom deck screens.