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 500GPM Mud System used in Middle Eastern for Water Injection Effectively Drilling

Many customers through Middle East coming to GN asking for the drilling mud system used in water well going. Some of these are used for civil normal water wells, while some of them are utilized in oilfield water injection effectively drilling. For some oil water wells with large content regarding natural gas in oil coating or at the later time period of extraction, the oil member of staff always inject water into your oil well to keep a comfortable pressure of the oil level to ensure the oil production pace.
One of GN’s customers through Middle East sent back the photos of GN’s 500GPM mud system on their site. Many people just finished the ordering of this unit and great remarks were given to GN. Different from the mud cleaning system for oil drilling, this particular water well mud system is designed compact structure in order that it could be put on a trailer home for easy moving \.

Below specifications of this h2o injection well drilling mud system
1 . GN 3-Panel screens shale shaker to get first stage solids spliting up, with screen area of installment payments on your 6 square meters, is employed to remove the coarse drillingcuttings.
2 . De-sander, de-silter and under located machine drying shaker composited 3-in-1 mud cleaner unit for orange sand and silt separation. Cyclone unit are full PU material, the quantities regarding 10 inch de-sander along with 4 inch de-silter cyclone are respectively 1 in addition to 8.
3. Three model centrifugal pumps are equipped with 50HP electric motors. 2 are used to transfer drilling mud to cyclone unit, even though the third one is for mud mixing hopper. To highly recommend same model pump will make it easier for potential customer’s maintenance.
4. This specific unit also has independent tank compartment for mud mixing and storage.
5. Entire power requested to run this particular 500GPM drilling mud system will be 126KW, the user could adjustable rate mortgage the engine accordingly while below pictures showing. Purchaser locally got the serp and put it on the trailer home as the power source of often the mud system.
In addition to waters injection well drilling, this manner compact mud system could also be used in HDD (Horizontal Online Drilling). For this type going, the driller need shift the used drilling mud to the mud cleaning system. Similar to the picture showing, the shale shaker is connected with any submersible slurry pump that'll be installed in mud ditch to do this job.

GN Solids Control Share Centrifuges for sell

Even in the down-time of oil drilling business, we want to give the best cost and fast delivery in order to client. And we stock regarding 60 sets high speed decanter centrifuge to satisfy the one yr needs for domestic marketplace and overseas market. The actual decanter centrifuge is 14inch dish centrifuge, can be used for each solids control project as well as waste management project. The centrifuge is with certificate; both may be used for onshore drilling task and offshore drilling task. If you have some urgent task, pls contact us freely to obtain reliable product in short shipping time.

14inch decanter centrifuge- GNLW363C main technical specs
1) The centrifuge is the same as US brand centrifuge, we now have many client formerly utilize US brand centrifuges, great they like GN centrifuge because of the high cost-effective items.
2) The centrifuge is by using highest configuration and greatest material for long as well as reliable service.
3) Dish Cylindrical and Conical area made from Duplex Stainless Steel 2205 by centrifugal casting, that is much better than SS304 or SS316.
4) Other Parts of the dish assembly material: stainless steel SS316L. These parts no need SS2205.
5) Screw protection kind: Tungsten Carbide Tiles with regard to longer life and simpler replacement. The price of this component is also very good, make it far easier for clients.
6) Mess flow distribution port as well as bowl solids discharge slot protected by tungsten carbide alloy. This idea is comparable as the screw protection, dependable and lower cost.
7) Dish assembly supported by tighten seat belt for protection of having in moving. This is very important, we now have many cases in past encounter that the bowl damaged due to transportation and delay the actual client’s project. But now, this can not happen.
8) Pressurized EX LOVER proof control panel the actual centrifuge can be used in warm areas, much reliable compared to flame proof type control panel.
Except for 14inch dish centrifuge, we also have some other type for choice, GNLW223 baby centrifuge, GNLW452 18inch centrifuge, GNLW453 18inch high-speed centrifuge, GNLW553 big dish big capacity centrifuge.
Some other solids control equipment: shale shaker , mud cleaner, mud agitator, shear pump, mud gun, mess pump, vertical cuttings dryer, screw conveyor etc .

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.