Month: December 2014

Hebei GN solids control is the top and first API certified manufacturer in China of solids control equipment and system. GN product has been exported to more than 60 countries, and GN highest standard decanter centrifuge is popular in the international market, especially in the Middle East and the Africa. About 100 decanter centrifuges are exported to the world for oil and gas drilling and diamond drilling. Also, GN has extended its business to drilling waste management with the second generation of GN vertical cutting dryer. And GN has designed and build the complete set of drilling waste management system with the first stage treatment of GN vertical cutting dryer and the second stage treatment of decanter centrifuge.

On the drilling site, cutting discharged from the first stage solids control equipment: shale shaker and the second & third(desander and desilter) will fall into a screw conveyor, which will feed the cuttings to the vertical cutting dryer to process. Cuttings will be dried with a OTC≤6%，so that the cuttings can be discharged directly. The liquids will be pumped into the decanter centrifuge for further process to separate the ultra-fine solids out of the mud, and then the mud will be clean enough to be reused. This year, GN drilling waste management system sell well, many a sets are now working on the site. One for Shell project is now working in Sichuan, Province, China; one is working in Cyprus to dry the oil-based drilling cuttings, also four for Nordous Industry Projects.

 

For environmental reasons, many drilling companies now require drying solution. GN vertical cutting dryer solution is not only suitable for oil-based mud drilling cutting but also for water-based mud drilling cuttings. And now it is accepted by big player gradually.

Lately, GN Solids Controlwelcomed among the America clients in Hebei . This client shows many interests to GN drilling waste management system. GN colleagues have talked about a great deal about this system to reply to any queries out of this client. GN technical engineer provides tech to support team and draw 2D sketches with this client.

Since every client has special calls for their tools, GN always attempts to do their finest.

This technique includes two tanks. The first mud tank is to separate the drilling waste and supply solids towards the second mud tank. The 2nd mud tank can be used for drying out the drilling waste.

For that first mud tank, GN Solids Control suggests our client to make use of the next tools:

1.A bouquet of Mud Recycling System, that is including one shale shaker, one Small

Mud Cleaner, one Centrifugal Pump and something mud tank.

GN Shale Shaker is applying GNZS 703E- HB, this kind can achieve to 7.5 G high vibrating strength, that is adjustable by modifying the vibration motor. GN Small Mud Cleaner is applying GNZJ 752E- 4N, the significant capacity of the cleaner is 200GPM. And also the GN centrifugal pump is applying GNSB 4x3A-10J, that one can be used for feeding the drilling waste to mud cleaner.

2. A bouquet of Vertical Cuttings Dryer, featuring its a bouquet of GN vertical cuttings dryer, a bouquet of GN high configuration decanter centrifuge, two NEMO pumps, one centrifugal pump and mud tank.

GN Decanter Centrifuge and GN Vertical Cuttings Dryer is a bouquet of right diamond necklace for cuttings dryer. Usually, the vertical cuttings dryer can cope with 30 tons to 50 tons cuttings hourly, and also the oil could be controlled with five percent, that is very appropriate for atmosphere protection.

Sometimes, clients from some nations might have very strict demands around the oil percentage within this situation the cuttings have to be worked with extra process for example chemical reaction that is another subject.

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.