GN CBM Drilling Mud System

Per different control system, there are fixed speed decanter centrifuge and variable speed control (VFD) decanter centrifuge.

Features of fixed speed control centrifuge

As the bowl speed and conveyer speed is fixed, cannot be changed, fixed speed control centrifuge is easy for operation and maintenance. And price lower compared with the same model VFD centrifuge.

Feature of variable speed control (VFD) decanter centrifuge

For the same model centrifuge decanter, VFD model cost more than fixed speed. Per International Explosion-proof standard, there should be positive pressured control panel for variable speed control for better cooling. It requests more professional on operators for the VFD decanter centrifuge.

For GN design VFD centrifuge, the bowl speed, conveyer speed and feeding pump flow are all flexible. Customer can change one or all of the 3 parameters to get the best separation performance in different jobsite. An and customer can change centrifuge parameter for getting the max. capacity centrifuge can reach.

Take GNLW363BG-VFD centrifuge for example, below steps show you how to find out the max. capacity of the centrifuge

1) For a bigger capacity, we should reduce the BOWL speed and increase CONVEYOR speed.

BOWL SPEED: 2000RPM

CONVEYOR SPEED: 40RPM

Pump running model set as AUTO

Then pump will running to the max. capacity it can reach.

2) Or you can try more settings to compare the capacity, with pump AUTO running:

a. Bowl 1600rpm, Conveyer 34rpm

b. Bowl 1800rpm, Conveyer 38rpm

3) The back drive motor is opposite rotating under low speed and high conveyer. If centrifuge shut down during running , reduce Conveyer speed.

4) For this centrifuge, the max. capacity will be not over 30cbm. As the pump max. capacity is 30cbm.

As quickly as the drilling site has been chosen, scientists survey the region to figure out its boundaries, and conduct environmental effect studies if essential .Drilling firm may perhaps require lease agreements, titles and right-of way accesses before drilling the land. For off-shore sites, legal jurisdiction has to be determined.

Right after the legal challenges are solved, the crew goes about preparing the land:
1. The land have to be cleared and leveled, and access roads might be constructed.
2. Simply because water is utilized in drilling, there should be a supply of water nearby. If there isn’t any all-natural supply, the crew drills a water properly.

For drilling fluids and cutting disposal .The group digs a reserve pit, which can be applied to dispose of rock cuttings and drilling mud during the Drilling Mud System, and lines it with plastic to shield the environment. If the web page is an ecologically sensitive region, for example a marsh or wilderness, then the cuttings and mud must be disposed of offsite – trucked away instead of placed within a pit.
For that reason, deciding on a appropriate solids handle system is essential for the job web-site to prevent polluting the atmosphere. Firstly, we will need know how several shale shaker might be applied for the job internet site and relative mud cleaner (http://www.gnsolidsamerica.com/mud-cleaner.html) for separating the fine particle. Secondly, the solids and cutting from shale shaker and mud cleaner are transferred by GN screw conveyer (auger) to the site for truck to delivery offsite or do additional course of action. Thirdly, GN decanter centrifuge is focused on separating the fine particle beneath 20 microns, which sustain the drilling fluids weight and retain drilling fluids clean. Finally, the drilling cuttings from shaker and drilling mud system still include fluids, which contaminate the soil if they’re directly buried. Consequently, GN-Solids-America vertical USA cutting dryer can dry drilling cutting to reduce the contamination and reclaim the drilling fluids.

All in all, deciding on a fantastic solids control technique is an critical portion for drilling. You could seek advice from with GN for solids handle unit.

From 2010 till now, GN solids America currently made and made more than 400 units of bentonite mud tank system and exports to more than 60 countries inside the globe. The application of our mud cleaning system such as TBM, micro-tunneling, piling, pipeline crossing, water effectively drilling, dredging, etc civil engineering. Broadway Bridge Replacement is one particular of our applications.
Why is bentonite needed in such boring operation?
Bentonite is really a clay which principally consists of montmorillonite. Though montmorillonite is the big fraction, there have a tiny portion of minerals like feldspar, quartz, volcanic glass, pyrite, gypsum and other organic matter. Bentonite kind a gelling compound when it reacts with organic matter. Bentonite has exchangeable sodium cations and when it disperses, it breaks into particles like plate of which negative charges remain on surfaces and optimistic charges remain inside the edges. If there has no agitation, these charged particles type the above discussed, jelly because of weak electrical bonds. When dispersions are disturbed, the electrical bonds, since it is weak, are broken and free of charge flow condition is established.
GN bentonite mud tank method like the equipments under:
1 Mud tank( customized size, in accordance with your requirement)
two mixing hopper with mixing pump , right after cleaning the applied bentonite, you should add much more water or mud additives and mix them together using the clean bentonite slurry.
three shale shaker( double deck) with cones, GNZS706 with upper three panel shaker screen (2mm) and bottom 3 panel shaker screen ( 40mesh). The upper shaker screen location 2m2; the bottom shaker screen area 2.6m2. The hydrocyclone size is 4 inch, the qty will depend on your requirement.
four mud agitator/ mud mixer, qty and model pls get in touch with GN solids control.
five centrifugal pump for feeding the cones
six pipelines, stairs, handrails, walkway, electric manage program, lights, man holes, clean gate, etc.
Not simply Broadway Bridge Replacement, GN bentonite slurry tank technique can also made use of for other civil building, if related to the earth boring. 

As the name implies, the Shale Shaker basket moves in a uniform circular  motion when viewed from the side. This is a “balanced” vibration  pattern because all regions of the shaker basket move in phase with the identical pattern. In order to achieve “balanced” circular motion,a vibrator must be located on each side of the shaker basket at its centre of gravity (CG) with the axis of rotation perpendicular to the side of the basket. The Brandt Tandem is a common example of a circular motion shaker.

Linear Motion

Linear motion is achieved by using two counter rotating vibrators which,because of their positioning and vibration dynamics, will naturally operatedin phase. They are located so that a line drawn from the shaker’s centre ofgravity bisects at 90˚ a line drawn between the two axis of rotation.

Because the counterweights rotate in opposite directions, the net force on the shaker basket is zero except along a line passing through theshaker’s centre of gravity. The resultant shaker motion is therefore “linear”.The angle of this line of motion is usually at 45-50˚ relative to the shakerdeck to achieve maximum solids conveyance. Because acceleration isapplied through the shaker CG, the basket is dynamically balanced; thesame pattern of motion will exist at all points along the shaker.

Linear motion shakers have become the shaker of choice for mostapplications because of their superior solids conveyance and fluid handling capacity. Solids can be strongly conveyed uphill by linear motion. The uphill deck configuration allows a pool of liquid to form at the shaker’s feed end to provide additional head and high fluid throughput capability. This allows the use of fine screens to improveeparation performance. The Derrick Flo-Line Cleaner is one example of a linear motion shale shaker.
more shale shaker infor:GN Shale Shaker

What is dewatering unit
Dewatering unit is a mixing system to mixing chemicals and drilling mud for floculation. After floculation, the very find solids will be formed into bigger size, and suitable for decanter centrifuge treatment.
For easy understanding, we can see that, it is similar like put orange juice into a cup of milk.  It is milk whilte originally, after mixed with juice, immediately, the milk is separated into floccus and pure-like water.

Sizes of dewatering unit
Dewatering unit is noramally put into container, there are 20ft containerized and 40ft containerized. Per different customers request, there are different design for the dewatering unit itself. There are 2-chamber dewatering unit and 3-chamberdewatering unit. And per defferent request, it can mixing chemicals from 1 ~ 3 kinds.

Dewatering cantrifuge for dewatering unit
Decanter centrifuge is normally used in dewatering unit. Per the jobsite footprint, the decanter centrifuge have 3 kinds of connections with dewatering unit:
1) The decantering centrifuge can put into container, connected with dewatering unit
2) The decantering centrifuge can put on the top of container, connected to dewatering unit
3) The decantering centrifuge can put outside container, connected with dewatering unit

How to order a suitable side dewatering unit?

If you want customized dewatering unit, you’d better try to answer below questions:
1) 2 chambers or 3 chambers request: 3 chamber is more widely used. 2 Chamber cannot continue mixing.
2) The chemical preparing speed (Liters/Hr): 1500liters/hr is a normal speed, customer can request customized mixing speed
3) Density of chemicals, in order to make sure the hopper size
4) Chamber capacity (if there is)
5) Other special request (if there is)