HDD Mud Recycling System with Decanter Centrifuge

HDD drilling is short for horizontal directional drilling project, it is widely used for the pipeline work for the oil and gas transporting and etc. Normally, the drilling mud recycled from the HDD machine is to be reserved in a mud pit and the mud cleaning system, which is used to treat the mud to be next time use, treats the drilling mud from the pit and storage the well done mud in the tanks.

Equipment needed for the HDD mud recycling system:

In a traditional HDD mud recycling system, there arenormally 3 phase of separation equipmentincluding shale shaker, desander cones, desilter cones and mud mixing unit for adding new chemicals into the drilling mud, normally 2 jet mixing hoppers and mixing pumps. But now, as the environment demands and the cost pressure for the contractors are becoming more and more important, a lot of HDD contractors are taking decanter centrifuge into consideration in order to get better separation result and lower the mud weight.

What is the main function of the decanter centrifuge used for the HDD drilling mud system?

1.       The centrifuge helps to minimize the negative effect on the environment.

2.       The centrifuge helps to reduce the weight of mud.

3.       Centrifuge helps to lower down the total cost on mud.

GNLW452C or GNLW452C-VFD is a very suitable model of decanter centrifuge to be used for the HDD mud recycling system. It is big bowl centrifuge of 18 inch bowl diameter and the speed of 1800 RPM is efficient for the HDD works, in China, the largest HDD contractor CPP, always use GNLW452 in their mud cleaning systems.

The centrifuge feed pump could transfer the mud from the storage tank to the centrifuge and after the separation, the mud could directly fall back to the same tank, cycling like this helps to reduce the mud weight. Or, there could be another storage tank to collect the drilling fluid from the centrifuge.

Welcome to contact GN for more suggestion and learn more information about other equipment such as mud gas separator, shear pump, mud mixing system and drilling waste management equipment..

GN Traditional Decanter Centrifuge Shown in Tehran

Last month, GN Solids Control attended Iran Oil Show, which was held in Tehran, Iran, during May 5^th to May 8^th, this yearly oil and gas show attracted a lot of visitors from all over Iran. Some companies’ top management came from Ahwaz, Kish and other oil fields in Iran and some are from other countries. Also, since last year, US lifted the sanction on Iran to some extent, Iran became one of the hottest expected market, many European companies are bring their equipment and service to Iran.

As leading solids control manufacturer, GN Solids Control is one of the top brands in IRAN oil and gas industry. And this time, the Decanter Centrifuge GN showed in the exhibition is the traditional model, which is well accepted by Iran clients.

What are the main specifications of this decanter centrifuge?

1.       Model of this decanter centrifuge is GNLW363CG, it is the 3^rd generation of GNLW series decanter centrifuges.

2.       Bowl diameter of this model is 14 inch, this is the most commonly used bowl diameter, like Derrick DE1000 and Swaco 518, they all of the similar size.

3.       Bowl length is 50 inch, so the ideal length-diameter ratio 3 is suitable for oil and gas industry.

4.       High speed up to 3900RPM in design and normal working speed is 3200RPM. By applying different pulley and belt, this centrifuge could work at other speed options.

5.       Best material for this application, as SS2205 as bowl main body, tungsten carbide tiles for impeller protection and special ceramic for solids discharge ports.

6.       Top brand parts like SKF Bearing, SIEMENZ, Schneider and ABB electrical devices.

For this model, GN also has flame proof VFD controlled and positive pressurized VFD control panel for option for the end user to achieve different speed at jobsite.

GN Solidification Unit Onsite Efficiency Well Proved

In recent couple years, GN Solids Control is keeping study and development the new merchandise so that clients could get any turnkey solution for drilling mud solids control as well as drilling waste management. With the slowly issuing of the new ecological regulations, the drilling workers focus their eye around the final solution of fingertips on the drilling waste.
Renforcement unit is a new produced product of GN for that final treatment of drilling waste material including drilling cuttings, necessary oil bottom sludge and so on. It's not firstly designed and created by GN; some other world famous drilling waste management equipment supplier currently made and sent in case for onsite application. Like a leading manufacturer of drilling waste material management equipment in The far east, no doubt, GN solids control will develop this equipment.

So far, GN’s renforcement unit already been sent to customer’s site for application along with the feedback was good. GN’s solidification unit has 3 chemical storage tanks in which the operator could put the concrete and lime in it. Through adjusting the feeding pace, the chemicals and waste will be fed to the mixing boat. Here the waste would likely become inactive material that wont pollute the soil as well as water. Furthermore, the discharges can be used to pave the road to get site.
Customer firstly raised on wet waste into that unit and the treatment outcome is not as good as expected. After, GN’s engineer told these people this solidification unit is utilized to treat the waste what exactly firstly should be treated by dryer unit. Like the drilling cuttings could be treated significantly dryer by the high Gary the gadget guy force drying shale shaker in addition to vertical cuttings dryer model.
GN is also thankful for any good suggestions from client on perfect the design of this particular unit. And GN performed upgrade the design and make the item more compact for site design and transportation. For some items request good sealing, GN also took into consideration. Any kind of interest on GN’s renforcement unit, please feel free to experience of us for more information.

Coupling for solids control rotating equipment

Meaning of Coupling for solids control rotating equipment

Coupling for solids control rotating devices are utilized for the bond of two axes (the driving shaft and also the driven shaft), allow the 2 axis rotating together and also to transfer torque. Within the transmission of high-speed and high load rotating system, the coupling have purpose of buffer, damping and enhance the dynamic performance from the shaft. Coupling includes two parts, correspondingly associated with the driving shaft and driven shaft. The majority of the general energy machine by way of coupling using the work machine connected.

Solids control equipment with coupling design

Normally, the rotating speed with shaft or axis will require Coupling, like

1) Mud agitator: It's lower speed rotating equipment. Normally, the rate is just around 60 or 70 revolutions per minute. It's use to agitating the drilling liquids in tank and eliminates the mud from settle lower. Per different tank inner dimension, the mud agitator motor energy differs from 5.5hp ~30hp. In some instances, to be able to have more compact design, coupler may also be not used.

2) High-speed/low speed decanter centrifuge: It's high-speed rotating equipment with speed around ~4000 revolutions per minute. Decanter centrifuge is use high-speed to create high G pressure, and utilize our prime G pressure to split up the fine solids from drilling liquids. Is dependent on several centrifuge model, the separation point is between 2~5 microns or 5~7 microns.

3) Different model pumps: centrifugal pump, submersible slurry pump, screw pump, and so forth.

4) Screw conveyer for drilling cuttings transfer.

Along with other rotating equipment.

Classification of coupling for solids control rotating equipment

You will find many different types of coupling use for solids control rotating equipment, here is the standard model be utilized.

1) Flexible coupling

2) Teeth-shaft coupling

3) Universal Joint

4) Star formed elastic coupling

5) Plum formed elastic coupling

6) Pin coupling with elastic sleeve

Related Arciels:

• Why now have big discount, is it in good condition?
• The method of use mud cleaner
• 1000HP Drilling Rig Mud System for Russia
• GN Vertical Cuttings Dryers and Decanter Centrifuges Working for SINOPEC Soon
• The operation of decanter centrifuge

Bowl – Conveyor Differential RPM and Torque

Differential RPM is the difference between the bowl RPM and the conveyor RPM. The differential is provided by the gearbox which transmits power from the bowl to the conveyor. Differential RPM is simply  calculated by dividing the bowl RPM by the gearbox ratio. Many desanders manufacturers provide a “backdrive” which can independentlyalter the RPM. Backdrive units are, in effect, hydraulic gear reductionsystems used to vary the speed of the conveyor relative to the bowl. On“backdrive” units RPM depends upon the rotation of the gearbox pinionand the orientation of the flights on the conveyor. For these units RPM may be calculated by:

RPM = (Bowl RPM – Pinion Speed)/Gearbox Ratio

RPM is important because it determines the velocity at which solids areconveyed through a centrifuge. For example, a RPM of 50 and a flight pitchof 3 in. yields a conveyance velocity of 150 in./min. Another expression takes the flight pitch and number of leads on the conveyor into accountto describe the surface area of the bowl swept by the conveyor flightsper unit time. The faster the rate at which the area is swept, the greater the solids capacity.

This equation suggests that solids capacity can be increased by increasingthe RPM (lowering the gearbox ratio). Low swept area values couldindicate potential torque problems. For example, centrifuges with 130:1 orhigher gearbox ratios and centrifuges with 80:1 gearbox ratios with singlelead conveyors may be limited in flowrate by torque.Test data indicates that by increasing RPM reduces torque. Also, torquepressure as feed median particle size increases. Despite the common  beliefthat high RPM values agitate the pond and inhibit sedimentation, testresults indicate that the effect of RPM on solids removal efficiency is slight,provided sufficient differential exists to remove the solids.

If you want to get more imformation, you can visit http://gnsolidscontrol.com/.

Dewatering System for Water Based Drilling Fluids

GN new designed dewatering unit for our client is customized design according to client’s particular project. We ever sold decanter centrifuges to a lot of clients for their dewatering system, but we did not provide the complete system design.

The whole system is devided into 3 parts: Part one solids control or called solids removal, part two dewatering unit, part three storage systems.

Part 1: Solids removal:

Double deck shale shaker GNZS706E-HB and mud cleaner GNZJ703E-3S

This part is to separate the big solids from the drilling fluids and less the solids content, so the fine solids will remain in the drilling fluids and be pumped to the dewatering unit.

Part 2: dewatering unit

This part is to add chemical powder into the drilling fluids for flocculation, then use the cutting machine to cut the big solids into small pieces, then use the screw pump to transfer to GN big bowl decanter centrifuge GNLW553VFD to separate the solids from water. Because water conservation has been a public concerned issue in the world, this dewatering unit has the functions below:

1)       Keep the drilling fluids balance by weight for better performance during drilling

2)       Less tank bottom for easy cleaning

3)       Less the cost for treating the water based drilling fluids

4)       Get more clean water for reuse or conservation

Part 3: storage of clean drilling fluids

These drilling fluids can be reused for drilling by mixing some chemicals.

Advantage of GN designed dewatering Unit:

1 Easy transportation: The equipments are fixed into a 20ft container size frame, so you can put it on the standard truck.

2 Suitable for both cold weather and hot weather: All the units are equipped into the 40ft container, which is rain proof, there is conditioner or fan inside the container to keep it cool. If you operate it in cold weather like Russia, you can close the door of the container.

For more info for this dewatering system, pls contact GN sales(http://www.gnsolidsamerica.com).

Related Article:

Dosing System for GN Mud System: http://drillingmudcleaner.com/vertical-cuttings-dryer-feeding-system/

GN’s Decanter Centrifuge for Solids Control

Decanter Centrifuge is the final stage equipment in a complete solids control system. After being discharged from a desilter or a mud cleaner, drilling mud will be pumped into decanter centrifuge by a screw pump. A decanter centrifuge usually can separate solids with a diameter between 2 to 7 microns out.  As to a decanter centrifuge’s working principle, firstly I ‘d like to remind your of a bottle containing the mixture of sand and water, you will see that sand is settled on the bottom, while the water is suspended on it. That because the sand enjoys a higher sedimentation velocity than the water for its larger density. And then we should refer to a laundry-drier which is used to dry washed clothes by centrifugal force, and the bigger the centrifugal force is, the shorter time it will taker to dry clothes. Combine the two suggestions, you will know how a decanter centrifuge works. GN Solids America’s decanter centrifuge with a mid-speed can remove solids of 5 to 7 microns out, and GN’s high speed decanter centrifuge can separate solids of 2 to 5 microns out. Besides being the final equipment in a solids control system, GN’s decanter centrifuge can also be used in a drilling waste management system.

    GN’s decanter centrifuge has the following advantages and benefits.

First, as the first API certified solids control company in China, GN solids America also is certified by:Europe DNV CE, HSE, ISO9001, Russia TP&TC. And GN firstly built an USA based solid control company:GN Solids America.

Then,GN's decanter centrifuge adopts many a new designs. For example,tungsten carbide tiles are fixed on the screw to protect it from wear, and the tiles are easier to be replaced.

Definitely, GN’s decanter centrifuge will be your perfect choice.