Drilling Mud Recycling System

Model choice of fluid shale shaker

The shale shaker is choose by the following facts:
The handling capacity (GPM)
The type of fluid, the ratio of the mass density, the speed of flow and temperature
salt and/or acid of materials (Confirm to use 304# stainless steel or 316L stainless steel)
Size of the solids material and screening accuracy needed
The sums of meshes (API)
The placed-area size to place the shale shaker in oil field

The set-up of shale shaker

When first commission the shale shaker, keep put the shaker on a horizontal base. The base needs to be firmed.

The shock-resist rubber material should be installed between the working table and equipment.
Remove the shipping brace like bolts and lugs because the base and screen box are connected by springs, so when ship, the above part of the equipment is secured by the shipping braces.
Do not turns on the equipment before remove the shipping braces.
The cables connected the vibration motors on the shale shaker always damaged during severe vibration. Protected-cover for the cable is provide and need to install with cable when connect control panel and the motors.
When stop using the shale shaker, the shale shaker screen should always is washed by clean water.

The installation of shale shaker screens

Clean the adhesive side well and put on the shaker screens.
Install the wedge blocks at the two sides at the same time.
Do the test-run after the installation of shaker screen to ensure installation is done properly. If there is any unusual noise of poor contact, stop immediately and recheck the installation of shaker screens.
The tilt-angle adjustment of screen box

When the volume of fluid running is too large, the mesh screen should be changed. When fluid running is small, the angle should be adjusted by tilting.
The angle of the screen should be tilted according to the actual demand. The adjustment range is -1 to +5 degree. When adjust the tilt-angles, take off the pin first, loosen rings screws, then run the manual and/or electric hydraulic pump.
When the shale shaker properly works, the fluid should flows 3/4 of the whole screen, if the fluid can not flows as much as required, in order to increase the effect of cleaning, the shaker screen should be changed.

 

GN Solids Control is a world-famous company specializing in manufacturing drilling mud solid control and waste management and recycling. Its product range covers shale shaker, desander, desilter, vacuum degasser, decanter centrifuge, cutting dryer, centrifugal pump, screw pump and so on. Its products are mainly used in oil and gas drilling, civil works(like piling, TBM, HDD), and mining industry.

                 

In the oil and gas drilling application, there is one important equipment in the solid control system, that is vacuum degasser. It is usually used after the shale shaker and before the mud cleaner. The main application of the degasser is to eliminate the gas immersed in the drilling mud, which will help restoring the mud weight, stabilizing the slurry viscosity, reducing the drilling cost, and preventing the well blow out accident. The vacuum degasser is mainly composed of vacuum tank installed on a skid base, vacuum pump, gas water separator, control panel, explosive proof motor. Its working principle is that: under the effect of the suction power from vacuum pump, negative pressure zone will be generated in the vacuum tank, and the drilling mud will enter the hollow shaft of the rotor through the suction tube under the effect of the atmospheric pressure. Then the mud will hit the windows of the hollow shaft and be sprayed to the wall of vacuum tank. Under the collision effect of the separation baffle, the mud will be separated into thin layers, and bubbles immersed in the mud will be broken up and comes out. The gas will be discharged by the vacuum pump and gas water separator to the safe zone, the mud will be discharged outside of the tank by impeller. In the whole process, the rotor will keep running at high speed under the power of main motor.

 

Now GN has two kinds of vacuum degasser: GNZCQ270A and GNZCQ360A, the processing capacity for these two equipment is 270m3/h and 360m3/h. Welcome to visit www.gnsolidsamerica.com

For centrifuge,explanation of noun/differential is important topic of choose and using centrifuge,the separate speed and result will effected by them

Will use GN’s centrifuge as sample if need do math

Explanation of Noun

Separation Factor: Ratio between centrifugal force and gravity of the suspension liquid or emulsion in centrifugal force field, namely ratio between centrifugal acceleration and gravity acceleration.

Separation Force design formulas:

Example:When the rotation speed of GNLW363C is 3130 RPM, the separation factor is 1973. While when the rotation speed of GNLW453C is 2800 RPM, the separation speed is 1973. We can see, when same separation factor, the larger the bowl diameter, the lower the rotation speed.

Differential speed is the speed difference between centrifuge bowl and the screw conveyor.

To get best separate result,control bowl speed based on feed different material will be very important

Effect of adjustment on technical parameters

In actual work, the solid content, solid particle size, viscosity of the slurry would be changed. Operators would choose the suitable centrifuge parameters according to the request on treated liquid and solids, capacity and so on.

Control of separation factor

Generally speaking, the larger the solids particle is in liquid and the larger the density, then the lower of the separation factor. Conversely, higher separation factor is required.

Adjustment of liquid pool

When the feeding rate is fixed, the deeper the liquid pool is, the solids will stay longer in the liquid pool. Then more solids would be separated out. On the other hand, the deeper the liquid pool is, the less fine and perturbed solids would ran away with liquid.

In the other way, a deeper liquid pool will make more clean liquid. However, the deeper liquid pool will reduce the drying area of the centrifuge, thus the solids would be with more moisture. Operator should weigh the liquid cleanness and solids dryness when adjusting the depth of liquid pool. Unless the dewatered solids will be incinerated for further disposal, in normal condition, very dry solid is not necessary. While the much cleaner liquid is desired, so, operation should adjust the liquid depth as deep as possible.

With more question about centrifuge,please contact GN solids control

In recent weeks, GN Solids Control just finished its production for a new project in the tunnel bored drilling industry, the order includes two large bowl decanter centrifuge and two containerized chemical dosing system. Successfully delivered this system to the customer representing GN’s great manufacturing capability and strong delivery capability.

GN Solids Control is a integrated company specialized in manufacturing the solid control equipment and spare parts, including but not limited to shale shaker, decanter centrifuge, cutting dryer, etc. This two new large bowl decanter centrifuge have the bowl size of 22 inches, and can process large volume of drilling mud and make it meeting the standard of disposal and recycle. This large bowl decanter centrifuge inherited the same great features from its predecessor 363 which is a very popular, mature and reliable product during all GN’s product line. The bowl material is made of 2205 stainless steel which is very tough and reliable, the screw conveyor surface is covered with tungsten carbide tiles which is easy for replacement and very easy for maintenance. The solid and liquid discharge port is also made with the tungsten carbide inserts, which has very good longevity. The bearing is provided by world famous brand SKF. All in all, this is a very cost effective but very good quality product. The containerized chemical dosing system is a great value and supplement to the decanter centrifuge, if the customer want to separate smaller solids, as the decanter centrifuge can only separate the solid size from 5-20 microns, when using the chemical dosing system, the solid separation size could reach up to almost zero. GN believe the customer will like it after using it.

GN welcomes you to log on to our website www.gnsolidsamerica.com and browse GN’s full product line, and if you want to get more detailed info, you can send your inquiries to lucas@gnsolidscontrol.com.

ADIPEC 2017 will be held in Abu Dhabi next week, this year as the oil price is recovering gradually and today the WTI price has reached up to USD 57 per barrel, we believe ADIPEC 2017 will be more successful than last year’s and will attract more and more attendees and exhibitors to attend the show, exchanging the ideas and share the latest technology in the oil and gas industry.

GN Solid Control is the advanced manufacturer for the solid control and waste management equipment and system. GN has been consistently attending the ADIPEC show for many years, and each year the customers will see GN’s growth and development. Now GN has become the one stop shop for all the solid control equipment, from shale shaker, decanter centrifuge, cutting dryer, to the various kind of pumps, such as centrifugal pump, screw pump, to the agitator, mud gas separator. GN not only make some new in equipment, but also make the great upgrade on the shale shaker screen. From the beginning of this year, GN has fully upgraded its shaker screen from the old steel frame screen, this will make much better performance and longevity that ever before. Also the new composite frame screen has larger non blank area and the processing capacity has been improved dramatically. And most of the screens are 3 layers, the wire mesh suppliers are the same as the other famous brand screens, such as the MI SWACO, DERRICK. If you are interested in this product, you could come to GN’s booth and take a look at it. We believe you will be impressed by the screen when you finally see it. Seeing is believing, welcome to GN’s booth.

ADIPEC 2017 is just around the corner, all GN staff is ready to welcome the friends from all over the world. Also welcome you to log on to our website www.gnsolidsamerica.com , and if you want to get more detailed info, you can send your inquiries to lucas@gnsolidscontrol.com.