Author: desanderdesilter

Drilling fluid enter into the hollow shaft in the spiral conveyor by the feeding tubes, then flow into bowl. Because of the high speed rotating of the bowl , to drive the entered drilling fluid rotating together, the solid debris in the drilling fluid is thrown the wall of the bowl, the drilling fluid expel from the screw conveyor pushing to the discharge hole of the small port. The choice of centrifuge by the debris size of separation solid phase, the bowl diameter of centrifuge, the highest speed and the separation factors influence, the drilling site commonly used the solid and liquid density difference, as the separation basic of the settlement centrifuge, mainly clear the solid phase substance in the drilling fluid, is the last level of drilling fluid solid control equipment.

 

Checking steps before operate decanter centrifuge:

 

The rotating body do not have any object to block or interfere the spinning operation.

The strength of the belt for main and support motor are not loosen and no crack.

Hand turn the body to ensure the rotation is smooth without resistance.  If resistance was felt during the rolling by hand, check both main and support motor first.

Check the inlet flow tube is open, and flow divider also need to be open when operation is start.

Check the water, is it in the rotating body?

It needs to check the motor oil level in the gearbox, rotating joints and the usual step list above if decanter centrifuge is not operation for set period of time.

 

The filtering steps that involve with shale shaker and hydrocyclone on desander and desilter can’t remove the most part of debris. Adding centrifuge can process fluid further by remove much smaller debris to achieve much cleaner drilling fluid for zero-discharge drilling fluid systems.

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While perform the drilling project on the earth, the rig produce the byproduct of cutting, crushing and grinding of solids that will be broken in loose pieces in different size.  The size in industry standard is measure by micron.  Solids control equipments in different filter stage will achieve the result by its design yet for muti-stage filter process, the line up of correct order of the machines are the must.

To make sure the drill hole cutting surface to the ground , the drilling fluid need to have enough speed in return.  It depends on the well diameter and rig ability to decide the pump output volume to achieve the fluid speed.  To achieve that speed, solids control  machineries need to perform in specific purification level base on particle size and treating capacity are fact that need to be consider.

The choice of drilling fluid shaker screen

Shale shaker is filter the solids in drilling fluid and it is one of the primary equipment.  The shale shaker filter the solids in various size by use the mesh that have different opening and layers to achieve the task.  The mesh number of the screen is bigger, the smaller capacity to remove the solid size is smaller.  The mesh number of is smaller, the bigger capacity to remove the solid size is larger.

In the drilling process, the mud pump produce large volume of mud that contain large cutting.  The screen should use smaller mesh number to filter the cutting.  Later in the drilling process while increase the depth and the well diameter is getting small, the pump produce the mud that contain smaller cutting, then it is time to use larger mesh number  to filter smaller cutting.  Other consideration such as mix ratio of water and solid will affect the result of filtering by the screen.

Solids control system is very important in a drilling site for it not only ensures safe drilling but also saves a lot cost by recycling the drilling mud. GN solids control is the 1 st API certified manufacturer of solids control system and equipment in China, and also certified by CE which is always required by European customers. Last week, GN solids control finished 3 sets of solids control system for an European customer, and now those system are ready for delivery. This is a repeated order from this customer, last time they ordered one set of solids control system for 750 hp drilling rig.

 

The main equipment included in these three solids control system is listed as below.

3 sets of shaker tanks, each mounted 2 shale shakers, 1 mud cleaner, and 1 vacuum degasser.

1 set of decanter centrifuge tank with 1 medium speed decanter centrifuge and 1 high speed decanter centrifuge.

1 set of active mud tank with agitators and mud guns.

1 set of suction tank with mud agitators and mud guns.

1 set of mixing tank with mixing hoppers and mixing pumps.

These are standard solids control system: shale shaker for 1 st stage treatment; mud cleaner for second stage treatment; medium speed and high speed decanter centrifuges for third stage treatment also known as the final stage treatment.

 

As mentioned before, the 3 sets of solids control system are exported to Europe, ATEX is required for motors and electric control panels, CE is required for all equipment. GN solids control is one of the few companies holding all these certificates. Besides solids control system, GN solids control also manufactures and supplies mud system for other kinds of drilling such as HDD and uprising geothermal drilling.

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Among the few Chinese manufacturers who are able to produce oilfield vertical cuttings dryer, We keep enhancing the design of our vertical cuttings dryer system based on the client’s feedback, we developed a particular oilfield used platform to repair our vertical cuttings dryer GNCD930C.With this particular platform, we are able to place the flushing pump correctly around the skid, with handrail, pathway and stairs. This platform can function once the vertical cuttings dryer rotary speed achieve 900rpm, whether there’s VFD control panel or otherwise. With this design, the dry cuttings can drop lower towards the cuttings collection box easily, and simple for maintenance.

 

Aside from the design, we have lots of customized design as following:

 

1 decanter centrifuge, liquids collection box, feeding pump, vertical cuttings dryer in a single skid, work with screw conveyor to transfer the dry solids in the discharge trough of vertical cuttings dryer with other place.

 

2 vertical cuttings dryer and hi-G drying shaker on a single skid with mud tank

 

3 vertical cuttings dryer on the separate platform

 

GNCD930C vertical cuttings dryer is the third generation VCD created by GN solids control, like a company possessed advanced production machinery and finest design capacity, GN solids control always lead probably the most advanced technology among China producers, the brand new design has solved the issues perfectly, including separated screen basket, eliminating of screen basket, prevent of block the screen basket, flies put on protection, solids discharge, cuttings moving, lubrication, etc.

 

GN offers the decanter centrifuge fit for the vertical cuttings dryer, model no. GNLW363VFD and GNLW363G decanter centriuge. We are able to design to use them one skid for simple transportation in oilfield jobsite, even the platform could be separated.

 

Please contact GN sales for the drilling cuttings treatment project, we’ll study your jobsite and supply a customized proposal with this standard design, if you’re near to the condition, thanks for visiting to check our vertical cuttings dryer in GN Houston office-GN solids America LLC.

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GN Solids Control has been focusing on solids control and drilling waste management fields for a long time. Each year, GN Solids Control produces about 150 decanter centrifuges and 400 shale shakers along with the other solids control tools. A majority of these equipment are delivered abroad because of the big international market.

 

Lately, GN has manufactured two decanter centrifuges for clients in Nigeria. Both of these decanter centrifuges are comprised one whole system for drilling liquids separation.

 

Naturally as is well-known, when two decanter centrifuges are utilizing together, the first is generally dealing with bigger capacity drilling mud, and the second can be used for separating finer solids. Even though the decanter centrifuge is principally accustomed to separate solids with diameter bigger than five microns, two decanter centrifuges have different separation function when cooperating.

 

Mentioning this system, GN suggested making use of two sets of GNLW 363 decanter centrifuge. The bowl diameter of the decanter centrifuge is 14 inch and the size of this decanter centrifuge is 50 inch. The treating capacity can achieve to 200 GPM. However for rotating speed of the decanter centrifuges, they won’t be the same. In order to save cash for clients, the first decanter centrifuge could be fixed speed at 3200 r/m. And the second could be rotating from 0 to 3200 r/m.

 

Once the drilling liquids with mud changes, we are able to adjust the rotating speed from the second centrifuges to fulfill the treating requirements. However, it might be easier to choose two sets adjustable speed centrifuges. When controlled by PLC, all operation work will be much simpler for workers.

 

Here both of these decanter centrifuges are generally fed by screw pump. GN use famous label screw pumps that are extremely effective feeding pumps, if this pumps is working, it can avoid agitating the drilling mud.

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As many client need Clean Water at present, then chemicals finally up to the show. Having a reliable partner, now GN has also become providing the flocculant unit and coagulant unit, with the decanter centrifuge, to provide client a satisfied solution.

 

The Auto-Flocculant 6000 activity unit could be located in a really 20ft normal instrumentation and serve as a typical compact system for dealing with and using compound solutions.it also could be put in 40ft container installing a GNLW series centrifuge. Due to the integrated system, the preparation and dosing method might happen robotically. Connect ex gratia feature provides the risk of relevant a solids dependent dosing mechanism. Supported the data acquired from measure each volume rate and suspension density, the compound response is injected in to the method in connect quantity proportionate towards the individual solid matter. This type of system can absolutely exclude undesirable over- and/or underdosing.

 

The Auto-Flocculant 6000 activity unit is provided a liquid compound unit to make certain the automated and continuous preparation of the homogeneously mixed focused compound answer with precise concentration parameters in a two-chamber way (product quantity: 3000 l/h) a powder/liquid compound unit to make certain the automated and continuous preparation of the homogeneously mixed focused compound answer with precise concentration parameters in a really three-chamber method (product quantity: 6000 l/h) a programmable logic controller with bit screen panel for automatic operation flow meters and pressure sensors 2 dosing pumps for moving the premixed flocculant towards the injection purpose.

 

Two chambers or three chambers, inside container, or outdoors sitting on a skid, could be personalized as needed.

 

Even the programmer of PLC manipulating the system, have two options, the first is by timer, these parts by water flow and drainage. After involve in increasingly more projects, we are more professional on all of this. Keep tune.

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Situated near to Beijing China Tower and Beijing International Airport, Hebei GN Solids Control enjoys a convenient location to attract foreign customers to visit GN factory and to established relationship. As the first API certified manufacturer of solid control equipment and system in China, GN solids control has a lot to say on the solids control system and equipment in oil and gas drilling field. Since established, GN has stick to the policy of striving higher quality and better service. With several year’s hard work, GN has also been certified by the CE by DNV. All these certificates indicates that GN Solids Control is a company worthy of trust and reliance.

 

GN manufactures and supplies solids control system for oil and gas drilling in various depth. In the whole set of solids control system for oil and gas drilling, generally there will be four stage treating equipment including shale shaker(1^st stage), desander(2^nd stage), desilter(3^rd stage), decanter centrifuge(4^th stage). Alternatively, the desander and desilter can be replaced by the mud cleaner with the combination of desander cyclones and desilter cyclone. And if the drilling is too deep, two sets of decanter centrifuge will be used. The one is medium speed, and the other is high speed decanter centrifuge. Beside solids control system, GN also supplies mud system for various kinds of drilling, and drilling waste management system for drilling cuttings.

 

Besides high quality product, GN also supplies considerate service:

Pre-Sales: Free consultancy and design according to clients requirements, provide optimal proposal for individual clients.
After Sales : Guarantee & Commissioning: GN Provide 1 year guarantee and free service for first time commissioning of system and training up clients engineer.
Spare Parts: GN always have spare parts available in stock to ensure fast delivery.

Like an increasingly more important drilling area, TBM plays a huge role in urban buildings in many nations. Therefore the drilling mud system for TBM becomes increasingly popular. As top manufacturer for solids control systems and waste management systems in China, GN Solids Control have ever began business in HDD and TBM area, and today GN offer more appropriate and modern solutions to meet those needs.

 

For Tunnel Boring Machines, which in a nutshell is TBM, the conventional for drilling mud is high. Within this system GN designed and manufactured for that TBM contactor, there’s a GN Double Deck Shale Shaker, a GNZJ594-3S16N Mud Cleaner, a 20ft container GN Dewatering Unit, a GNLW363BG-VFD Decanter Centrifuge as well as their necessary pumps, as well as an extra tank for arranging the drilling mud for entering the drilling system.

 

Each equipment’s functions:

 

1. GN Double Deck shale shaker. This shale shaker has 2 layers of screens, and also the lower layer’s screen is a lot finer the low layer. Then your drilling mud might be regarded as two times treated through the shale shaker, with only a little space occupied.

 

2. GNZJ-3S16N mud cleaner, a mix of desander cones, desilter cones and shale shaker, desander cones and desilter cones could separate out solids contaminants bigger than 20 microns, and also the API 200 drying screen can help dispose large contaminants.

 

3. GN 20ft Container Dewatering unit. With the addition of some chemicals in to the drilling mud, the flocculation helps you to collect the more compact contaminants into bigger contaminants, after treated by GNLW363BG-VFD high-speed centrifuge.

 

4. Well treated drilling mud with ideal proportion then makes its way into the arranging tank for later in to the TBM drilling system.

 

5. Besides all above pointed out, this customer also purchased another group of GN double deck shale shaker and GNZJ594E-3S16N as backup.

 

Lately, GN has produced several teams of such systems for clients in various areas and regions. For those who have interest or similar need, please get in touch freely.

Lately, GN’s drying shale shaker system has finished its commission. As GN stay with quality and repair, best of luck is just looked over before delivery from GN factory, and complex mud system GN provides commissioning service by dispatching engineers towards the working site.

 

As proven within the below introduction, the mud cleaner is installed between 2 models of shale shaker. It’s not general layout, once we have spoken that for any solids control systemor perhaps a mud system, mud cleaner (normally the alternative of a desnader and desilter) within the next stage to process drilling mud after shale shaker. Even though it is specifically created by GN engineer using the thought on narrow space within the working site, and fully thinking around the pipe connection. GN engineer strongly and thoroughly modified the overall design by finding the mud cleaner between 2 models of shale shakers. The drilling mud pumped out of the well is going to be given individually towards the 2 shale shakes for treatment, and they pumped in to the mud cleaner for more process.

 

Regarding towards the shale shaker, to safeguard it from damage, its deck is locked throughout transportation. Prior to the trial running, the operator need fixed the shale shaker on the top from the mud tank and unlock when. GN shale shaker‘s vibration motor originates from famous label Italia OLI or Martin with explosion -proof consideration for performance and safety. GN is first API licensed solids Control Company in China. Near the above two features, Simple structure is among the options that come with the GN’s shale shaker, the consumer can certainly master how you can operate it and perform the commissioning themselves. Concerning the control panel, GN provides electric diagram, the operator can begin and switch from the shale shaker without an excessive amount of electrical understanding.

As GN produces increasingly more solids control tools and drilling waste management systems to fulfill clients altering demands on drilling fields or Non-search fields, clients have greater and greater demands on GN Solids Control that is supplying them the required costume parts for example shale shaker screens.

 

Now GN will quickly establish his new factory to meet the requirements of huge quantity shaker screens. Around the finish of the year, GN new branch factory can help GN to create a lot more shale shaker screens, which new branch clients are quite close to GN Solids Control Company. It’s this kind of very good news for GN as well as for GN clients.

 

Usually, GN can establish from 5000 pieces shale shaker screens to eight 1000 pieces shale shaker screens each month, however, thinking about the big need this manufacturing capacity isn’t enough. Anyway, based on new factory, GN will solve these complaints perfectly well, and GN will introduce many advanced CNC machines to enhance the development, in addition to hire more knowledgeable employees to focusing on this special area.

 

For GN Solids Control, a myriad of shale shaker screens could be created, like the hook strip flat screens, the pyramid screens, hook strip soft screens and steel frame screens etc.

 

If you’re able to title the screen, then GN will design and manufacture them. The great characteristics which are adopted strictly by GN engineers, therefore the world most well-known brands could be exchangeable and carried out well on many different shale shakers. By utilizing GN shale shaker screens, our clients cannot only keep your same performance because the renowned brands screens, but additionally can same much cash around the cost. For this reason our clients always call GN shale shaker screens economical.

 

With lots of effective encounters, GN has over 60 countries’ clients which are using his shaker screens, so we believe case the great start of GN shaker screens, later on increasingly more clients may have the chance to become familiar with GN.