Author: gnadmin

As the leading manufacturer of solids control equipment
in China, Hebei
GN Solids Control Co., Ltd always focus on the delicate details to improve its product
quality and to distinguish itself from other China’s suppliers. Take the star
equipment decanter centrifuge for instance, which sell around 200 sets a year,
especially popular in Latin America, Africa and the Middle East. GN Solids
Control takes unique protection device to protect the decanter centrifuge
during transportation and give detailed instructions for storage to keep it
good.

 When transported, fix the bowl by fixing belt
and tightening belt before long distance transportation to protect the main
bearings. Lift at the appointed eyes when assembling and disassembling. Fix the
centrifuge stably at the well covered truck or closed cabin when transported so
as to prevent collision and influences by bad weather. If the decanter
centrifuge is not be used immediately, the decanter centrifuge should be placed
in a warehouse ventilating well with a relative moisture below 90% at 25 ℃. Temperature should be no higher than +55℃ and no lower than -25No strongly corrosive
should exist. Smear grease or paint the places which are likely to rust if for
long time storage. To prevent dysfunction of electrical components caused by
damp, electrify the control cabinet once half a year.

 With the powerful protection measure for
transportation and detailed instructions for storage, the quality of GN
decanter centrifuge is improved. Besides serving as the last stage treatment
machine in solids
control system,
the decanter centrifuge can also used to treat oil sludge with chemical added,
and for dewatering unit with dosing systems. In addition, GN also designed and
manufactured specialized waste management decanter centrifuge to handle the
drilling waste discharged from the vertical cutting dryer as second phase
machine.

Oilfield screen shaker separator normally called oilfield shale shaker or screen separator. It is the first step solids control equipment used in oil field and other drilling activities. It is the necessary solids control equipment for mud systems, no matter for oil and gas drilling, HDD, CBM, TBM, or piling.

Per the motion type of screen shaker separator, there are linear motion screen shaker separator and balance elliptical motion screen shaker separator.  
Oilfield screen shaker separator is normally linear motion type. And linear motion screen shaker separator is the most popular and long history type. Linear motion is more reliable. It can suits more kinds of jobsite condition.
While Balance elliptical screen shaker separator is very limited with jobsite and mud condition. When there are big load of mud, or the mud fall onto screen shaker deck unequally, the motion will be damaged and the BEM shaker cannot be working well. Mud will be over flow.

Per shaker deck quantity, there are single deck screen shaker separator and double deck screen shaker separator. Double deck screen shaker separator can be used for scalping shaker separator. The top deck use coarse mesh screen for pre-separation, while the bottom deck use normal mesh wire screen per jobsite condition.

Per the difference of applications and G force, screen shaker separator can be divided into solids control screen shaker separator and drilling waste management high G screen shaker separator. Beside the application G force is different, for solids control screen shaker separator and drilling waste high G force screen shaker separator, the feeding type of the 2 screen shaker separator is also different.
Solids control screen shaker separator is normally use top type or back type weir feeder, or box feeder, while drilling waste screen shaker separator is use hopper feeding.
Solids Control screen shaker separator can be fed by slurry pump or fed directly from the rig manifold under gravity. While drilling waste screen shaker separator can be fed by screw conveyer or cuttings transfer pump.  

GN Solids America, it is the branch company of GN Solids Control Company Limited. It is located in Houston Texas. With its own office building and warehouse.

GN Solids Control and GN Solids America took part in 2015 OTC oil show with great success. The head company GN Solids Control takes its latest design drilling waste management equipment (high speed decanter centrifuge, vertical cuttings dryer) for the show. And GN Solids America show the mud cleaner separator machine for the OTC oil show. Mud cleaner is a 3-in-1 machine, with the function of desander, desilter, and a under flow shale shaker.

GN solids control mud cleaner for oil and gas drilling showing on OTC
1) Mud cleaner model: GNZJ594E-2S12N
It is the combination of under flow shale shaker GNZS594E, a 2-cone desander, and 12-cone desilter.
2) Capacity of the mud cleaner: 240m3/h (max.)
The capacity of mud cleaner depends on the desander cone and desilter cone capacity. The smaller one is the treating capacity of the whole treating capacity.
Desander cone and desilter cone is on D100 separation machine. There will be some amount of useful mud discharged together with dirty mud. So the function of underflow shale shaker is to further treat and recovery mud and dry the solids discharge.
Some jobsite may use desander or desilter with not under flow shale shaker to save cost. But the performance is surely not as good as the combined one.
3) Feeding pipe size of the mud cleaner is 6’’ and the output size if 8’’. GNSB8*6 centrifugal pump is mostly used to feeding for the desander and desilter.
4) Shaker screen of the GNZJ594E-2S12N mud cleaner: the under flow shale shaker is a 4-panel shaker with long shaker deck. It can make the solids more dryer. The shaker screen is pretention type, and mounted with wedge for fast screen changing.
5) GN patent design for Synchronous adjusting of the deck angle. When the operator adjust shaker angle at any side, both sides will be up or down with exactly the same angle. It saves time of jobsite people and easy for operation.  

Drilling waste decanter centrifuge can be used together with Chemical enhance dewatering unit. We call it dewatering unit. The total system is normally put in a 20ft container or a 40ft container, per customers’ request.

Chemical enhance dewatering unit, frankly speaking, it is a mixing system for chemicals. Chemical can be mixing and storage in the system per the set conditions. And then the qualified chemicals can be transferred to decanter centrifuge feeding pipe and mixed with mud before center into centrifuge for treatment.

Some customer is wondering: the decanter centrifuge is used to separate the fine solids from drilling mud, why chemical enhance dewatering unit is need together? And in which condition, the chemical enhance dewatering unit is needed?
The reason is that, decanter centrifuge is a kind of physical separation. It applies high G force and the differential speed to separate fine solids above 2 ~ 5 microns from drilling mud. For the even more fine solids smaller than 2 ~ 5 microns, decanter centrifuge is not worktable. They will be left in the fluids after separation. If customer want to separate this part of the ultra fine solids and get more pure water, chemical treatment is requested.    
The function of the chemical enhance is to make the fine solids in a bigger size, in this case, decanter centrifuge can treat it.

Then customer have another question, how they get the chemicals? How should they know which kind of chemicals should be add? How much should be add? How long time should be wait? How long time for mixing with drilling mud? If they buy centrifuge dewatering unit from GN Solids Control, can GN company offer chemicals to them? …
Answers as below: The centrifuge manufacturer or dewatering unit manufacturer, they normally only make the machine, they do not supplier chemicals. There are chemical company for all the jobs. What you should do then is to find a reliable chemical supplier, send them samples of your materials, and tell them result you want to get, the chemical engineer will test and offer you the suitable chemicals and instruct you how to use it.

GNLW452 is an economic standard decanter centrifuge. It is specially designed and made by China top solids control manufacturer – GN Solids Control Company. It is a basic centrifuge model for middle speed. It is widely used for barite recovery. Another popular function is to reduce the weight of high gravity mud, like used in HDD mud system to reduce the weight of the mud.

Parameters of GNLW452 middle speed decanter centrifuge for mud recovery system or barite recovery.

Dimension: The centrifuge is with 450 mm (18 in) bowl diameter and 1105 mm (43 in) in length. So some customer called it big bowl centrifuge.
Speed and G force: The max. bowl speed is 1800 rpm and the typical speed is also 1800 rpm. G force under 1800rpm is 815. Differential speed is 32rpm @ 1800rpm. In some cased, drilling site may need a lower speed, in the condition that, the mud weight is big, or want a bigger capacity, GN Solids Control can offer another set of pulley and belt to get a lower fixed speed, like 1200 rpm. In this case, customers only need to change the pulley and belt to lower down the speed.
Separation point: 5~7 microns. It means, it can remove solids bigger than 5 ~ 7 microns. Bigger than this point, the solids will remain in the mud. For HDD mud recovery system, this separation point is good. And when GNLW452 is used for barite recovery or used to reduce the weight of the mud, it is mainly used for pre-separation. There normally will be another set of high speed centrifuge for fine solids separation.
Recommended feeding pump for GNLW452 centrifuge is 11kw (15hp) screw pump. GN Solids Control recommended German brand NETZSCH pump feeding for the centrifuge.

Advantages of GNLW452 middle speed decanter centrifuge for mud recovery system or barite recovery
1) Single motor design for more compact design
2) Screw protection is interchangeable ceramic tile for longer lifetime and easy maintenance.
3) Screw flow distribution port and bowl solids discharge port protected by tungsten carbide alloy.
4) Easily adjustable liquid discharge weir height for flexible application.