Author: gnadmin

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)

Naturally, drilling conditions and cuttings volumes modify constantly through the course of constructing a wellbore. Dual-function and small space is recognized by essentially the most project contractor. GN 705E Double deck dynamically manages fluid excellent all through the drilling procedure. The double deck shaker with de sander or de silter is widely applied for the HDD and nicely drilling field

1. Double deck shaker with 1 de sander hydrocyclone cone

Fluids will firstly be pumped onto the bottom shaker, the shaker screen is tiny API quantity to separate the huge particle from the fluid. Secondly, GN high productive centrifuge pump will transfer the fluid to de sander cone for second step process. The leading deck will manage the fluids from apex of de sander cone.

2 Double deck shaker screen with 4,6 or 8 sets of de silter cone
The working principle is definitely the similar as the de sander. But the feeding sort is quite uncomplicated pipe which can save the operating space. Higher mesh shaker screen is applied on the shaker than desander shaker.

GN double deck shaker delivers the flexibility necessary to optimize fluids capacity and fluids recovery. Also, it fits nicely within tightly constrained workspaces. For the jot website, GN double deck shaker is very sensible program.
Mud cleaner for U S Market : http://drillingmudcleaner.com/mud-cleaner-for-u-s-market/
Operational Recommendations of Shaker Screen : http://desanderdesilter.com/operational-recommendations-of-shaker-screen/

CBM drilling is the short name of Coal Bed methane. 95% of CBM drilling is getting nature gas. It is very different with oil and gas drilling. Oil and gas drilling rig normally need to drill very deep well to get crude oil, while CBM drilling is normally in small depth.  

As the special features of CBM drilling, it has higher standard for drilling fluids. High quality bentonite is widely be used for CBM drilling mud systems.

As the high request on environmental protection, zero discharge mud system for Coal Bed Methane drilling necessarily should be equipped.

GN international high standard Zero discharge mud system for CBM drilling

1) GN double deck shale shaker with 4×4 inch desilter cone.

It is the first stage and the third stage solids control process. The double deck shale shake combine the function of shale shaker and desilter.

2) Baby centrifuge GNLW223VFD with small PLC control for VFD. It is used as forth stage solids control.

3) Mixing hopper and mixing pump for mud mixing

The mud tank can be skid mounted, mobile mounted, or equipped with hydraulic jack up legs for self-lifting.