Desander Desilter

In a standard OBM waste management system, there are mainly 2 equipments for treating the drilling cuttings, the first one is a vertical cuttings dryer. Recently, in a jobsite located in Sichuan Province in China for SHELL, GN’s waste management system including a vertical cuttings dryer and a decanter centrifuge.

GN Solids Control is the first solids control company who designed the vertical cuttings dryer. The vertical cuttings dryer is like a washing machine’s drying function, by means of centrifugal force, the vertical cuttings dryer separate the cuttings from the liquid via high rotating speed. Now GNCD 930 vertical cuttings dryer is having its 3^rd generation, the drying efficiency, OOC could reach less than 5%. After it was manufactured, it was well tested in factory, and when it was took to jobsite, it was tested to be efficient in both OBM and WBM, and also SBM. Below is the working video in shell jobsite.

The decanter centrifuge in this system is a very popular sized centrifuge with 14 inch diameter bowl and bowl’s length-dia ratio is ideal 3. This centrifuge in practice is not only used in waste management system as in the video, but also widely used in solids control systems for cutting the mud weight or barite recovery and also used together with flocculating equipments as package with dewatering units.

For both the vertical cuttings dryer and decanter centrifuges, GN has fixed speeded and VFD controlled for options, suitable for different jobsite and condition. May you need more information, welcome to contact us freely.

Related Article: Screw Conveyors Used in Solids Control System and Waste Management System

With the continuous improvement of environmental protection requirements, operators need a variety of solutions to the solid-liquid separation technology to a new level. The vertical cuttings dryer plays an important role. The main role for the effective recovery of oil drilling in the ingredients is that the vertical cutting dryer can effectively reach drilling solids transportation, adapt environmental regulatory requirements for the current environmental waste mud treatment and safe disposal of waste oil field services vital equipment for oil field separation effect drilling mud and oil-based mud compound significantly.

The vertical cuttings dryer’s Features and Benefits:

1. High efficient solid-liquid separation, can be the content of the drill cuttings slurry minimize, reduce the amount of processing waste.

2. The effective separation and recovery of a greater proportion of the slurry, and reused in the mud circulation system, recycled pulp due to the shale shaker running, moving  and mud clogging and other losses.

3. The common wear parts can be replaced from the top of the unit; do not need to move any equipment, you can replace the belt.

4. Interchangeable tungsten carbide rotor blade and the gear box, to avoid excessive corrosion, reduce the failure of major components.

GN made drilling cuttings dryer’s advantages:

GN Solid control is the only Chinese company with API and ISO certified that can independently design and produce cuttings dryers.GN vertical drill cuttings dryer makes the mud cuttings dried by the centrifugal force on the oil-based and synthetic-based drilling. The stainless steel drum carry the wet solid cuttings and is allowed to spin up to 890RPM debris among the liquid through the slit sieve drum, and the dried solid were rotating cone connected angled scraper scraped cone is only slightly slower than the speed of drum sieve. Carbide blade wear good protection to ensure a long service life. This helps to maintain uninterrupted between the blade and drum sieve gap is a key factor in the smooth functioning of the device. Crown can drill cuttings dryer main rotating components are rigorously balancing test to reduce vibration and noise.

In order to meet with today faster drilling requirement, we keep improving the drilling fluids design including bigger capacity of decanter centrifuge, high capacity shaker with unique shaker screen design and streamlined process. Under this situation, GN displays a series of solids control equipment including shale shaker and decanter centrifuge.

 

GN Vibration Screen Shaker

 

GN drying Shakerwas designed with a two-motor system that can operate the linear motion mode, allowing the operator to tune the G-force down and up depending on the drilling fluids conditions. It provides operator flexible way to make the adjustments based on the condition and volume of drilling fluids across the shaker surface. The shaker can behandled with high G-force for highflow rate but can be turned down to a less vibrating mode for cutting solids flow and volume.GN shakers were recently deployed to many drilling site.

 

GN Solids Control Decanter Centrifuge

GN offers different size decanter centrifuges including 14inch 18 inch and 22 inch. We have more than 30 sets 14 inch bowl decanter centrifuge working in the Nigeria, more than 20 sets of 14 inch bowl centrifugein the Argentina.GN decanter centrifuge provides the most reliable working performance for oil and gas drilling industry. Regarding to different requirement, we also have different model to deal with.

1. Barite Recovery.

 

We utilize either GNLW 452（18 inch） under the 1800RPM or GNLW 363(14inch) under the 2200 RPM to recovery the barite.

 

2. Generally Solids Control or High Gravity Solids

 

We use GNLW 452（18 inch）or GNLW 363(14inch) under the 2700 RPM to recovery high gravity solids. Typically, we also use GNLW 363(14inch) under the 2700 RPM matching with GN vertical cutting dryer for waste management

 

3. Low Gravity Solids

 

We normally utilize the GNLW 363(14inch) under the 3200 RPM which effectively remove solids

 

If you have any solids control issues, please feel free to contact with me.

Hebei GN Solids Control Co., Ltd is the first API certified solids control company in China. This year, GN has made many a solids control system such as one 1000 GPM for COSL, drilling waste management system such as one for GWDC to do service for Shell and four for Baker Hughes in Russia, and also mud system for various drilling. Last month, GN has delivered one set of TBM mud system to its Singapore customer. As introduced before this mud system has a dewatering unit, but in this blog, delivering unit will be introduce briefly. Different from using screw conveyor to deliver solids to a vertical cutting dryer to handle in a drilling waste management system, belt conveyor is used as delivering system in the TBM mud system delivered last month to Singapore.

 

GN provides supplier one-stop service, so GN also outsources some equipment to finish its project and to provides one stop service. Regarding to the TBM mud system delivered to Singapore,  GN purchase the belt conveyor form other suppliers to provide the customer the completer and considerate service. And here I’d to share the usage scope of the belt conveyor briefly after translating the user manual into English.

 

With high delivering volume, simple structure, easy maintenance, low cost and universal usage, TD 75 fixed belt conveyor is usually in metallurgy, coal, transportation, electric-water industry to convey material in power. According to delivering requirements, it can be used singly. Also, a horizontal or slop delivering system can be formed with many a TD75 or with the combination with other equipment.TD 75 is usage temperature is between +40℃ to -10℃, and the material should be below 50℃. Measures should be taker for special requirements such as explosion -proof, anti-water, anti-corrosion, heat withstanding and coldness withstanding

GN solids America is a China based manufacturer of solids control equipments and drilling waste management equipments but with sales office and warehouse in Houston, TX. Our main equipments for solids control including:

Shale shaker( 3 panels or 4 panels, linear motion), mud cleaner(also called 3 en 1 or mud conditioner), desander ( with underflow shaker or without, desander cone 1pc, 2 pcs or 3pcs), desilter (with shale shaker or without, desilter cone 4inch 8pcs, 12pcs, 16pcs for option), vacuum degasser, poor boy degasser, mud agitator, mud gun, centrifugal pump replacable with Mission pump, shear pump for jet shear unit, mixing hopper, screw pump( NETZSCH brand in Germany), slurry pump, etc.

Our main drilling waste management equipments including:

Vertical cuttings dryer, decanter centrifuge, hi-G dryer shaker, screw conveyor, dewatering unit

Screw conveyor is also called Auger which is used to collect and transfer the drill cuttings from the shale shaker to vertical cuttings dryer or cuttings collection box for further treatment. For better operation and maintenance of GN screw conveyor, the following instructions should be followed up:

1 GN standard screw conveyor is composed of 12ft length each section, 2 section, 3 sections or 4 sections for choice. At the end of each auger, there are 2 bearings, which should be lubricated regularly. There is suspension bearing at the end of each section, which should be added grease every 2 weeks.

GN provide options of screw diameters for 12inch, 14inch, 16inch and 18inch.

2 Gearbox is installed at the end of the screw conveyor, it should be lubricated every 6 months according to the operation instructions.

3 The screw conveyor should be installed properly and carefully when it arrived at the jobsite, then placed correctly and tighten the anchor bolts.

GN solids America has professional engineer team in Houston for immediate trouble shooting, pls call us at 713 320 3868 for emergency service.

Related Article: Mining Industry Slim Hole Drilling Application in Oil Exploration

Fixed speed centrifuge is popular with some customer in tight budget. This kinds of centrifuge is not that easily to use when you shift between different projects with different material property, or when the treating material property change and require centrifuge working with different speed. Why say like that?  Because it takes some time to change belt pulley to get different bowl speed. If the user is familiar with the process on belt pulley change, it may only takes 2-3 hours; However, if the user is not familiar with process on belt pulley change and lacking of some necessary tools, things may be harder and it may takes some days to find the necessary tools first and then, you can done the job.

1) What we need to change belt pulley for GN fixed speed decanter centrifuge

In order to service the customer better, GN Solids Control will offer one tools box containing some necessary tools for centrifuge operation and belt pulley change. The tools including but not limited to below items:

Spanner/Wrench, Grease gun, Screw nuts and screw pine, Tape, Pine wrench, Puller, Drilling Waste Management System, Arm crane Etc.

 

2) The process to change the belt pulley

 

Firstly, we need to release the main motor and put it close to the auxiliary motor;

Secondly, we need to disconnect the rubber connection between auxiliary motor and conveyor;

Thirdly, we need to remove the belt pulley with the coupling;

Fourthly, we need to disconnect the belt pulley from coupling;

Fifthly, we need to put the new belt pulley on the coupling

Sixthly, we need to put back the belt pulley with coupling back to the main motor.

Then, reverse the process one step by one step.

 

The best way is to learn the process from the manufacturer. Different manufacture with different design of centrifuge; GN Solids Control can offer jobsite service if customer request. And also, the customer can come to GN factory to learn about it.

 

GN headquarter in Beijing, China:  No.3 Industry Road,Dachang Chaobai River Development Area,Langfang,China

GN branch office in Houston, USA: 6710 Windfern Road, Houston, TX 77040, USA

Check power voltage to see if normal before turn the motor on.
Check all the bolts are properly tighten before turn the motor on.
Check all the shaker screen are properly secure with wedge block.
Check if  there is any foreign objects on the shale shaker.
When the cleaner operate at normal condition , there should be minimum  noise and  the operation should be smooth and steady, if there is any unusual noise, stop and check the equipment immediately.
If the connection cable between vibration motor and the control panel has been changed because of maintenance or changing motor, the cleaner will not  work effectively. It needs take off the shield at the end of the vibration motor, connect the power and observe whether the rotation directions of the two vibration motors are opposite direction. If not, then it needs adjust to be opposite direction.
When change the vibration motor, adjust the rotate  blocks on the two vibration motors to be consistent.
After tighten the bolts of vibration motor, have a check every 8 hours, if there is any loosen, tighten it.
When the vibration used for about 500 hours, inject some of specific lubricant grease(about 80g).
The control switch is explosion-proof, do not open if not necessary. If need to check for issue,  it needs turn off the power first. When check the equipment for possible issue, do not be neglected details or wrong installed, to guarantee the explosion-proof.
The wedge of shaker screen should be checked each 8 hour, if there is any issue of loosen, tighten it on time.
With compact the shaker screen, the tension force of each bolt is 5KN.
When the cleaner is used for 1000 hours, some lubricating grease should be injected into the grease box.
If the springs damaged, change the springs as soon as possible. When changing the springs, the screen box should be raised, and put the springs on the spring bases, then ease-down the screen box.

Visit Here to get more information about Solids Control Equipment.

Recently, one of GN Solids America Singapore customer came to GN to inspect the mud system with a dosing system to flocculate small solids into larger ones for treatment in solids control. And in last essay, the whole system is generally introduced, and also GN solids America is introduced. In this essay, I will introduce the dosing system which plays an important role in this Drilling Waste Management, without which it may fail to separate solids in the use mud strictly in compliance with the customer’s requirements.

Dosing is define as the below in Wikipadia. Generally, dosing means to feed chemical or medicines into a process fluid in small quantity, or to living being at intervals , or to atmosphere at intervals to give sufficient time for the chemical or medicine to react or show the results. For this system, the first feeding to fluid is adopted, and show the final result of small solids being flocculated larger ones for easy separates.

The whole dosing system is divided into 2 tanks(www.watertanks.com). The flocculant in them is fed into the decanter centrifuge through a screw pump in turn, at the same time ,the mud after processed by desander is fed into the decanter centrifuge through the other screw pump. With the flocculant, the ultro fine solids become larger ones which are more easily to be separated out. This dosing system is totally automatic controlled. Once the required concentration is set by man, the dosing system will works with the automatic controlled chemical feeding and water feeding. After the one tank is filled, the valve will be closed automatic, and then the other tank will open.

With this dosing system, ultra fine solids will be consolidated larger ones, which can be removed out from the mud through a GN decanter centrifuge.

Abu Dhabi Oil Show is one of the most important oil shows in world, GN Solids America, since its establishment by year 2007, has attended to this event for several times, always took with them the most popular equipments. Some GN customer got to know GN in Abu Dhabi and later visited GN company for further cooperation.

 

This year, for year 2014, GN also have a booth there, and this time, GN is planning to bring the most popular model GNLW363 Decanter Centrifuge, fixed speed decanter centrifuge with a high speed.

 

Comparing with VFD Control GNLW363, which shares same series model as the one for oil show, the fixed speed one has its common points and its own features.

They are in common in those features:

1. Same bowl diameter: 14 inch diameter, most popular size world widely.
2. SKF bearings original Sweden. GN always choose best parts for its mud cleaner.
3. Same bowl material SS2205 for main part of bowl and SS316 for other bowl parts.
4. Tungsten carbide tiles for impeller protection, better for wearing and easier for later dynamic balancing
5. Tungsten carbide tiles for solids discharge ports.
6. Easily adjustable liquid discharge ports
7. High speed it could reach about 3200RPM.
8. Able to separate out 2-5microns particles.

……..whatsoever, both fixed speeded and VFD control GNLW363 has exactly same main body of centrifuges.

 

Why choose fixed speed GNLW363?

A shaker screen is easy to transport and installation. The fixed speed control panel is installed on same frame of the centrifuge. Comparing with the one with a VFD control panel, this one occupies less space.

If the site condition and mud composition is stable and operator clearly knows which speed is more frequently used, it is better for one to choose a fixed speeded model. It also saves the cost for purchasing and later maintenance.

 

GN Solids America has available several options for this model, and the one for the Abu Dhabi Oil Show will be on sale to customers with sea freight to Abu Dhabi free of charge.

GN Solids Control Factory in Kazakhstan was constructed and place to operation on 7th April, 2012. This factory is positioned in MTS TRAKTOR CO. , LTD, 312 Infantry Division District, Aktobe, Kazakhstan.
The productive completion of GN factory in Kazakhstan indicates a further achievement in GN international brand promoting, marking the exclusive benefit of direct service for Kazakhstan, Uzbekistan, Turkmenistan, Tajikistan, Kirgizstan, Russia, Ukraine, Azerbaijan, Iran as well as other oil& gas production countries.
Compared with other solids control manufacturers, GN has gained the neighbour initiative by this factory establishment in Aktobe City. Owing to the tax alliance agreement between five countries of Middle Asia and Russia, Ukraine, the delivery time and cost will be dramatically reduced from customers payment on the solids manage system which is a significant component in the whole drilling rig.
GN drilling rig assembly factory in Aktobe, Kazakhstan can supply main rig, mud pump, generator unit, compressor unit, MCC unit, camp unit, diesel and water tanks as well as manufacturing, maintenance and assembly of drilling fluids solids control system for oil& gas companies and oilfield drilling contractors in Middle Asian, Middle Easternand Russian countries. At the same time,GNService Co.,Ltd (Kazakhstan ).a professional oilfield service supplier of GN branch company, can provide drilling fluids package service including mud material, shale shaker screen, solids handle equipment, drilling fluids waste management, Mud Cleaning System and Equipment, etc.

3 Phase Decanter Centrifuge and Two Phase Decanter Centrifuge for oil market : http://gn-solids-control.typepad.com/blog/2014/09/3-phase-decanter-centrifuge-and-two-phase-decanter-centrifuge-for-oil-market.html