Author: gnadmin

As a top manufacture of solids control machine, GN solids control can design and manufactures various kinds of solids control system for oil and gas drilling; geothermal drilling, water well drilling, HDD, CBM, Piling and so on. One of mud recycling system was delivered to Niger for water well drilling, and our after sales team came back this week after commissioning of this mud recycling system. Niger is one of the least developed countries in the wold whose economy source mostly comes from agriculture. Since 2013, the government was committed to develop economy and attract foreign investment with a relatively stable politics condition. While because of the natural disadvantage( shortage of water for the close location to the Sahara desert), small market and large up-front capital investment restrictions, Niger is still experiencing difficulties in developing economy. 

This time, GN after sales team came to Niger for commissioning for our customer who has got ready for water well drilling. The full details of this system are listed as below.

1/ The drilling rig was purchased from Drillmec, an Italy brand.

2/ 1 set of double deck shale shaker with desilter cyclones, solids over 25microns will be separated out.

3/ 1 set of mud hopper for chemical mixing and bentonite addition, 

4/ 1 set of mud recycling system with one desiltering compartment and one mixing compartment.

5/ 1 set of clean tank used to store clean mud

Besides mud recycling system for water well drilling, GN solids control is also specialized in oil and gas drilling with shale shaker for the first stage treatment, desander for second stage treatment, and desilter for third stage treatment, and decanter centrifuge for the final stage treatment. Also many two stage treatment equipment of mud system for other kinds of drilling.

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2015 Beijing CIPPE(China International Petroleum and Petrochemical Exhibition) was held from 26th March to 28th March. As a resident in Beijing CIPPE, GN solids control showed its updated products with state of the art technology. The exhibition ended with great success, and GN has come back with great success. A tremendous amount of visitor came to GN booth to have a look and understand of GN product, and also extended their interest to cooperate with GN. Not only visitors from domestic market, but also a large number of foreign visitors came to GN.

This time, GN bring its a complete set of drilling waste management system with new and updated design; it includes a VFD control vertical cutting dryer for first stage treatment of the waste, and a VFD control decanter centrifuge for second stage treatment of the liquid discharged from the vertical cutting dryer; and a tank was divided into 2 compartments; one is for collecting liquids discharged from vertical cutting dryer where it will be pumped into decanter centrifuge for second stage treatment; another one is to collect the liquid discharged from decanter centrifuge, but it is rather small so a transfer pump is needed to transport the liquid,actually clean mud, to a storage tank or active tank waiting to be reused. The whole set of drilling waste management system is installed on a skid which is designed for transportation of the system. And the vertical cutting dryer is supported by a telescopic frame with which the vertical cutting dryer can be lifted higher than the tank so the liquid when discharge from the vertical cutting dryer can flow into the tank by itself. While the vertical cutting dryer needs to be lowered down for truck transportation. The positive pressurized VFD electric control box for the vertical cutting dryer and decanter centrifuge , and the decanter centrifuge are installed on the tank.

Starting from solids control system for oil and gas drilling, GN solids control is now being qualified to design and manufacture various mud system for various drilling after several year development, certainly mud recycling system for geothermal drilling included. In December of last year, GN exported one set of 500 GPM mud recycling system to Kenya. Now, the system has arrived to Kenya and finished custom clearance. As pointed out in the sales contract, GN will dispatch after sale team to Kenya for the first commissioning without charge within 7 days. And now, the after sales team is well prepared and ready to fly to Kenya next week. Actually, Hebei GN Solids Control own the biggest portion in the international market of solids control among all China’s manufactures. The reason is not only that GN provides high quality product worthy trust from customers, but also GN offer considerate and professional services to ensure that GN product operates well and the customer can operate rightly and properly.

This 500GPM mud recycling system for geothermal drilling to Kenya includes:

1 set shale shaker with low weir of 500mm which suits to small rigs with lower inlet flowline to the shale shaker;

1 set desander with 1 piece 10’’ cyclone to continuously process the mud after shale shaker,normally solids over 40 microns will be separated out. This desander requires a 30kw feeding pump.

3 sets mud tanks: one is mud treating tank, one is mud mixing tank, and another is mud storage tank.

6 sets mud agitator and 6 sets mud gun for: mud mixing tank and mus storage tanks both are equipment with three.

1 set mud mixing hopper

Besides 500gpm, GN also provides mud systems of 200GPM, 800GPM, 100GPM, and 1500GPM.

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Decanter Centrifuge is among the most
typical and well-known equipment in drilling mud solids control project. It’s frequently utilized
as the 4th stage solids control equipment to get rid of the best fine solids.
To some degree, the performance from the centrifuge determines the prosperity
of the work.

How you can define the capability from the
horizontal sedimentation decanter centrifuge

The majority of the oilfield application
decanter centrifuge producers worldwide claim the capability that is examined
using the water. Go ahead and take GNLW363BG normal size bowl centrifuge
for instance, the nominal capacity is 132GPM, this capacity is perfect for
water and also the actual dealing with capacity could be various based on the
drilling mud condition or any other factors. That’s why when customer asks how
is the capability from the centrifuge, GN always asks the consumer to supply
just as much information from the drilling mud as you possibly can. Normally,
the solid content percentage and distribution, the mud density and viscosity are
essential needed.

How you can choose the appropriate decanter
centrifuge according the reason

The decanter centrifuge is classed as
middle speed and high speed; GN team suggested choosing the decanter centrifuge
rotation speed according the work purpose.

a. For barite recycling, the G force
700-1000, RPM around 2000

b. For low gravity solids separation, the G
force 1800-2300, RPM 3200

C. For High gravity solid separation, the G
force 1000-2000, RPM 2500

How you can adjust the centrifuge technical
parameters for correct operation

You will find some parameters from the
centrifuge throughout operation have to be given more attention for easily
working and specified performance result. The parameters here involved will be
the bowl speed, the differential speed, the feeding flow rate and liquid
discharge port plate adjustment.

If you prefer a large treating capacity,
you will want enhance the differential speed by raising the bowl speed.

If you would like the liquid as clean as
enough, you’ll need enhance the bowl speed, lessen the differential speed, and
lift the liquid discharge plate to some high position, thus the mud would
remain in the bowl for extended time, and also the liquid pool could be deep.
More solids could be sediment for the bowl wall. Then liquid released out might
have less solid particle.

If you wish to the released solid material
much dryer, you are able to enhance the bowl speed, lessen the differential
speed, minimizing the liquid discharge part plate position. Then your liquid
could be released rapidly, and also the solid could have a lengthy distance for
dewatering when discharging from the cone slope in the small finish from the bowl.

An effective feeding flow rates are
important too for well performance from the centrifuge. Usually, the operator
would try several occasions with various flow rates to select a finest one.
This is often implemented only through the variable speed control pump.

GN Solids Control can provide decanter
centrifuge for fixed speed and Variable speed. To learn more, don’t hesitate to
connection with us.

As an expert of solids control system for oil and gas drilling and drilling waste management system, GN solids control designed a new system with dewatering unit for a Singapore client. Recently, GN engineer just came back with the working video of this dewatering and drilling waste management system from Singapore. 

 

Firstly, the water slurry in TBM will be treated by a double deck shale shaker: the upper shaker deck mounted with 2mm opening screen is to separate coarse solids; the bottom shaker deck with API 20 screens. After processed by the shale shaker, the slurry will be pumped into the desander, particles over 45 microns be separated out, meanwhile there will be an underflow shaker to dry the down flow stream with screen of API 200. Before slurry being delivered to the decanter centrifuge there will be a stream of flocculant prepared by the dosing system combining with the slurry, and then the mixed slurry will be delivered to the big bowl decanter centrifuge for dewatering process. The fine solids will be separated, leading to clean water and dry solids. Working video is available in the below link: http://gnsolidscontrol.com/video/gn-solids-control-drilling-mud-dewatering-system-working-video

GN solids control is qualified to provide all solids separation equipment and system, normally including the below steps:

Step 1: over 100 microns particle be separated by shale shaker;

Step 2: 50-100 microns be separated by desander;

Step 3: 20-50 microns be separated by desilter;

Step 4: 2to10 microns be separated by medium and high speed decanter centrifuge;

While, if for ultra-fine solids between 0-2 microns, chemically enhanced centrifuge needed.

GN solids control always tries its best to find solutions for its client according to there requirements and problems, that why GN solids control system is well accepted by its customers.