Author: desanderdesilter

GN Solids Control not only offer solids control equipment, but also offer solids control equipment test service after sales. In this pattern, GN Solids Control can support on the customers from overseas or domestic.

 

At the beginning of 2014, one customer from Cyprus who committed herself on oil service and solids control service buy one sets drilling cuttings treatment system to pro-handle the drilling cuttings/drilling waste from offshore rig. They have one plant to storage and treat the drilling waste.

 

The drilling cuttings treatment/dryness system including below items:

One sets VFD Verti-G dryer, this is replacement for CSI/ Swaco dryer.

One sets VFD Decanter Centrifuge, this is replacement for Derrick DE1000/ Swaco 518 centrifuge. High speed centrifuge can separate fine solids from drilling liquid after treated by Verti-G dryer.

One sets slurry pump which installed on the catch tank between Verti-G dryer and decanter centrifuge. This slurry pump is used for feeding centrifuge.

One set trailer mounted skid to hold all the equipment above.

 

The working process can be separated briefly as below steps:

Step 1: the drilling cuttings / drilling waste/ drilling sludge can be feed to Verti-G dryer by screw conveyor.

Step 2: the drilling cuttings / drilling waste/ drilling sludge be treated by Verti-G dryer. The operator can adjust the dryness by changing the rotation speed of the screen basket. The VFD control panel can help on it.

Step 3: the liquid parts will go to catch tank for storage; the solids parts can be collected by cuttings box.

Step 4: if the liquid parts is not flowable to be feed for centrifuge, the operator can add some base oil / water to dilute it. Then, use the slurry pump for feeding centrifuge.

Step 5: the centrifuge separate the fine solids from the waste; liquid part go to next equipment, Solids part collected by cuttings box.

 

GN Solids drilling cuttings treatment system have been exported to Baker Hugher, Nabors Industries, Shell etc. The quality is tested by many jobsite. Click this link you will learn much more:

http://www.gnsolidscontrol.com

 

In a solids control system, desander is the second stage equipment, which removes solids particle size 40-100μm out of drilling fluids. Then the next is desilter removing particle size 16-50μm out of drilling fluids. While, cone(also acknowledged as hydrocyclone) is the functioning part for both desander and desilter. In accordance with the size of cone diameter, cones are classified as desander cones with a diameter over 6’’ and as desilter cones with a diameter less than 6’’. Generally, 8’’ and 10” cones are generally utilized as desanders; 4’’ and 5’’ cones are often used as desilters.

You may be concerned about the cones’ working principle. You will find the answer in the following paragraph.

In normal operation, feed slurry is forced tangentially into the interior of the cone in a high speed, causing whirlpool effects inside the cone. The swirling motion of the slurry drives the larger and denser particles outward against the cone wall towards the lower discharge port, whereas the smaller, lighter particles move towards the center of the cone and go out through the upper discharge port. The separation of solids from drilling fluids is finished.

GN’s desander and desilter cones are made of polyurethane material, and adopt a removable assembly to be installed on a shale shaker.

Related article:

http://mengda0312.over-blog.com/2014/12/gn-made-mud-cleaner-hydrocyclone.html

Dewatering centrifuge generally require high speed centrifuge with High-G force to separate ultra-fine solids from the water based drilling mud liquid part. GN Solids Control can offer different range of centrifuge from low speed to middle speed to high speed centrifuge for difference field application.

GN Low speed / middle speed centrifuge. Like GNLW452 centrifuge, with 1800rpm working speed, can used for barite recovery on solids control mud tanks.

GN high speed centrifuge, like GNLW453 and GNLW553 with big capacity, can reach to 2500rpm for barite recovery or mud weight cutting.

Now GN Solids Control is promoting its super high speed centrifuge GNLW363CG-VFD with typical speed of 3800rpm. With this working speed, the dewatering centrifuges will working very well to meet customer’s requirement.

Flocculent unit is chemical enhancement on drilling fluids before feeding high speed centrifuge. We can offer Three Chamber Automatic Mixing System (PAM); PAM Mechanical operated diaphragm pump; Safety valve (LRRV-P25，PVC); Back pressure valve (LRRV-P25, PVC); Pressure gauge (0-10bar,PP); Buffer Device – LRAC-P1.0, PVC（DN50 Reducing）; 20FT Customized Container & Attachments. We can also offer BV certificate on the customized container for safety.

GN Solids Control have customer from Iran and Singapore who have bought dewatering centrifuge with flocculent unit from us. The customer with professional chemical engineer and centrifuge engineer use the equipment very good. As we are only equipment original manufacturer, we are not familiar on the chemical knowledge. So, we advise the user who buy these kinds of equipment find some professional advisor locally.

The customer from Singapore buy many equipment from us . Except for dewatering centrifuge with flocculent unit, the customer also buy shale shakers, mud cleaners.20ft containers with customized attachment.  The customer from Iran is our old customer who bought over 10 sets centrifuge from us each year. They are locally very strong mud service company.

GN Solids Control is stable solids control & waste management equipment supplier. With high standard quality equipment, perfect solution offer and reasonable price, GN Solids Control is best choice from China.

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.