Microtunneling slurry separation

A set of GNMS-1000D mud recycling system and a 18 inch decanter centrifuge is ready for shipment. They will be shipped for a trenchless drilling project. GNMS-1000D is a Mud Treating & Recycling System. The mud cleaning system is designed and manufactured according to the needs and requirements of customers. GNMS-1000D mud recycling system is specially designed to treat the drilling mud in mining industry, piling machine, HDD (horizontal directional drilling) and other trenchless drilling activities. The treatment capacity of GNMS-1000D mud recyling system and cleaning system is up to 240m³/h.

1000GPM Mud Recycling Unit

A double deck shale shaker is used in the GNMS-1000D mud cleaning system. There are 2 sets of 10 inch desander cone assembly on top of the double deck shale shaker to use as a mud cleaner. The advantages of a single deck mud cleaner is that, it has the function of both shale shaker and cleaner and the footprint if small while with the compact design. The dirty mud will be fed to bottom shaker deck, which is mounted coarse shaker screen. The centrifugal pump is located on the tank slope to feed for the desander cleaner. Besides GNMS-1000D mud recycling system, GN Solids Control makes other capacity drilling mud cleaning system for trenchless drilling rigs: D Series Mud Recycling Models: 1) GNMS-200D mud cleaning system with handling Capacity: 200GPM, 50m3/h 2) GNMS-500D mud cleaning system with handling Capacity: 500GPM, 120m3/h 3) GNMS-1000D mud cleaning system with handling Capacity: 1000GPM, 240m3/h 4) Other models can be customized according to clients special request. GNLW452 is an economic standard decanter centrifuge. It is a 18 inch big bowl centrifuge. But the bowl diameter and bowl length ration is only 2. And the max. Bowl speed of the GNLW452 centrifuge is 2200RPM. It is a single motor decanter centrifuge with fixed speed control. VFD control is available if requested by clients. The centrifuge is widely used for trenchless drilling mud treatment, and oil & gas drilling mud barite recovery.

GN Solids Control is one of the well-known International Brand for drilling Mud Solids Control System & Drilling Waste Management system. GN Solids Control offers the one stop solution for Solids Control treatment of oil gas drilling, CBM drilling, HDD, and water well drilling as well as the construction drilling mud treatment etc.

Nearly all drilling mud processing equipment containers shaker screen separation. Replacement shaker screen is a major wearing spare parts for drilling mud system. And it is a big and continue cost. GN Solids Control is specialized in high quality replacement shaker screen for various popular shaker models. GN Solids Control has his own R&D department for shale shaker screens. Clients can also contact GN Solids Control to make customized shaker screen.

Most solids control equipment manufacturer only make some kinds of processing equipment. Like some companies make shale shaker, mud cleaner and agitators, but they are not capacity to make decanter centrifuge or cuttings dryers. Some companies are only capacity to make centrifuges for various industries, they cannot make solids control separation equipment, like shale shaker, mud cleaner, degasser, etc…While some companies are only make pumps, they cannot make separation equipment. And there are some companies only make mud tanks, they are not capacity to make solids control separation equipment by themselves.

GN Solids Control is focusing on full line solids control equipment for various drilling mud. GN Solids Control is specialized in drilling mud liquid and solids separation. All the separation equipment are made by GN Solids Control. In this case, GN Solids Control knows more about the separation equipment, and can offer more reasonable proposal.

Furthermore, electrical control system is another essential point for separation equipment, especially VFD smart control panels for decanter centrifuges. GN Solids Control has his own electrical control department. GN Solids Control electrical engineering business department has comprehensive ability to provide solution for explosion-proof electrical control. GN is able to provide the electric control system, explosion-proof electrical enclosure design and development, fabrication, site installation, program debugging, and other services.

GN Explosion Proof Certification: GN Solids Control electrical control products have been certified by China National standard CNEx, International standard IECEx and European standard ATEX certificate, which enable GN’s products to meet high level market requirements.

GN Solids Control sells many 9 inch small size decanter centrifuges to South America every year. A few days ago, some sets of Solids Liquid Separation Small Decanter Centrifuge for South America Client are ready for shipment.

9 inch is a small size decanter centrifuge used for solids and liquid separation. It is normally used in diamond drilling slurry separation system. The 9 inch Solids Liquid Separation decanter centrifuge is also popular used in mining industry waste water treatment system.

GN 9 inch Solids Liquid Separation Small Decanter Centrifuge is specially designed for small capacity, small footprint, and fine solids separation.

The Bowl material GN 9 inch Solids Liquid Separation Small Decanter Centrifuge is SS 304 by forging. Similar as popular size 14 inch decanter centrifuge, the Screw protection of GN 9 inch Solids Liquid Separation Small Decanter Centrifuge is with Tungsten Carbide Tiles for longer life time and for easier replacement.

Bowl solids discharge port of GN 9 inch Solids Liquid Separation Small Decanter Centrifuge is protected by Ceramic casing, solids blocking ring avoid solids building up. Bowl assembly supported by tighten belt for protection bearing during transportation.


Besides 9 inch Solids Liquid Separation Small Decanter Centrifuge, GN Solids Control is also capacity to make other solids liquid separation equipment, like other sizes decanter centrifuge. Shale shaker, mud cleaner, etc…

Besides centrifuges, shale shaker and mud cleaner, GN Solids Control makes full line drilling mud processing equipment, like mud agitator, centrifugal pump, vacuum degasser, mud gas separator, jet mud mixer, screw conveyor, slurry pump, solids sludge vacuum pump, screen vacuum unit, vertical cuttings dryer, high G dryer, dewatering system, solidification unit, etc…

GN Solids Control can also make full package drilling mud purification and recycling system to treat drilling mud and drilling cuttings from various drilling activities (oil and gas drilling, HDD, CBM, water well drilling, TBM, piling, micro tunneling).

Last week, several packages of Mud Cleaning System were shipped to Chinese sea port. The mud cleaning systems will be sailed to North America to service their mud cleaning projects. The project the client will do is that, they collect various kinds of waste mud and waste water from rigs or from construction field. The client transports the waste mud and waste water by vacuum trucks, and treat them together to reduce the waste material, and recover solids and waste for reuse. It is high standard mud cleaning system to suit for North America standard.

The features of the mud cleaning system are that, its design is very compact for small foot print. Several mud separation shale shakers and dewatering centrifuge unit are equipped in the system for better separation performance.

1) First separation is by double deck coarse shale shaker to remove the big size solids from the waste mud and waste water. The top of the shale shaker is covered by metal boards to avoid mud leakage during shale shaker vibration.

2) After the double deck coarse shale shaker, next separation is taken by a single deck high G force shale shaker. The same design as the double deck shale shaker, the top of the single deck shale shaker is covered by metal boards to avoid mud leakage during shale shaker vibration.

3) A package of dewatering centrifuge unit.

As there are still many fine solids particles inside the recovered water from shale shakers, a dewater unit is used in the system for chemical dosing. It is used together with a high speed big bowl decanter centrifuge for fine solids separation.
The mud cleaning systems can recovery as more sands from the waste water. Regarding the waste mud from hydraulic excavation drilling, the recovery liquid phase is usable mud for reuse. The separated sands can be used for construction material.

This is the last working week before Chinese Lunar New Year holiday, after that offices and workshops will be closed for a 2-week holiday. All GN workers are working day and night in order to ship as more as orders before the 2-week holiday.

Some dewatering centrifuge units are dispatched to sea port, they will be exported to a Southeast Asia client. The dewatering centrifuge units will be used for TBM mud treatment. TBM is short for Tunnel Boring Machine, it has a wide application in railway, hydropower, transportation, mining, municipal and other tunnel projects.

Drilling mud is used to lubricate drilling bits during Tunnel and Boring drilling activities. For environment protection, the drilling mud and waste water must be recycled and reused during and after the drilling activities. Besides normal mud desanding plant, dewatering centrifuge unit is also requested in some application to treat the waste water.

GN dewatering centrifuge unit consists of big bowl big ratio decanter centrifuge, and chemical dosing unit. The decanter centrifuge and chemical dosing system is combined as a full package unit to remove as more ultrafine solids as it can do. The decanter centrifuge and chemical dosing system are both allocated inside a fabricated container. The full package can be shipped as a shipper owner container during international shipment. And the containerized design can protect the centrifuge and chemical dosing system, which values much. And they are easy for shipment between different jobsites.

Decanter centrifuge itself is a Physical separation machine. It can only separate solids by particle sizes. It cannot remove ultrafine solids smaller than the cut point. By chemical dosing, the ultrafine solids can be flocculated, and reach the centrifuge cut point for solids removal.

Besides dewater centrifuge unit, GN Solids Control makes full line desanding separation equipment for TBM and other trenchless no dig activities, like shale shaker, desander, desilter, etc…

GN Solids Control makes Mud Recycling System and desanding plants for construction Trenchless Engineering Companies, like for HDD (horizontal directional drilling), TBM (Tunnel Boring Machine), Microtunnelling, piling, etc…

GN Solids Control has more than 10 years of experience in the design and manufacture of mud recovery systems, especially in trenchless projects with multi-function and compact design to cater for different demands and applications from clients. According to the different requirements from users, and jobsite situations, GN Solid Control can provides different configurations of mud recovery system and desanding plant to meet the requirements of different working conditions. There are usually two types of mud purification systems suitable for trenchless construction: one is sand removal unit with cyclone purification system, we usually call it desanding plant. And the other type of design is self-contained mud recovery system.

The desanding plant with hydro cyclone purification system occupies a small footprint, and is economical and affordable. The system is composed of a hydrocyclone and a double deck shale shaker, both of which are installed on a small mud tank. The sand removal cyclone purification system is a two-stage separation device, and its function is to remove coarse particles from drilling mud. The desanding plant is mainly used in projects that can accept larger particle size solid drilling mud, such as Microtunnelling, piling, and so on.

The high standard self-contained mud recovery system developed by GN Solid Control is composed of four stage separations: shale shaker for coarse cuttings separation, 10 inch desander cone separation, 4 inch desilter cone separation, and decanter centrifuge for ultra-fine solid separation. The mud tank of the self-contained mud recovery system has a bigger storage volume to store the purified drilling mud. At the same time, it also has more tank surface space to arrange more separation equipment. Customer can also choose a centrifuge to reduce the ultra-fine solid in the drilling mud and to avoid the enrichment of the ultra-fine solid phase in the drilling mud.

GN Solid Control not only has a standard sizes of mud recycling system and desanding plant, but also provides custom-designed mud recovery system to meet for different demands.

The business of today’s GN has been divided mainly into 2 scopes, one is the normal drilling mud recycling, and the other is the waste management including the waste coming from petroleum related and other separation industries. This blog is mainly talking on the drilling mud recycling system that used in non oil drilling industry.
In oil drilling, the drilling depth and safety regulation request large drilling mud storage and more solids control equipment. Thus, the mud recycling system is always equipped with degasser unit and large volume mud tanks.


HDD Mud Recycling System

Comparing with the mud recycling for oil industry, the unit for non oil drilling is more compact and less equipment needed.

  • Trenchless/No Dig HDD project – The mud recycling system used in this type drilling is matching with a No dig rig. In some project for long distance pipeline and cables laying underground, it is inconvenient to dig an open groove on the ground as that will interrupt the normal traffic. The trenchless is an ideal choice. The mud recycling system for this project is always consisting of 3 stages separation as shale shaker unit, de-sanding and de-silting cyclone.
  • Piling is the main method to install the bridge supporting pillar. A de-sanding unit with a small tank would be enough to remove out the coarse solids from the drilling fluids. The de-sanding unit is a composition of de-sander cyclone and shaker unit that can separate out the solids with size of 40-70 microns. Piling does not request very clean mud; less equipment involved makes the recycling unit for piling is very compact.
  • GN also can manufacture the mud recycling system for tunneling project. For micron tunneling, GN has model available with capacity of 120m3/h, 240m3/h and 500m3/h. For large flow rate request, GN has the mud plant GNMS -3600M with treating capacity of 3600m3/H.

Tunneling Mud De-sanding Plant

Besides, GN’s mud recycling system can also be used in water well drilling, coal bed methane exploration, dredge slurry separation and the mining flushing waster cleaning process.

As per the feedback from the customers who are engaging in the pilling business, GN designed and perfect the economic mud recycling system specially for the drilling mud cleaning application in piling project. On the consideration of limited location area of the piling project job site, GN’s piling mud recycling system is designed with a very compact structure but with full functions for drilling mud recycling.

GN economic desander unit (2)

De-sanding Unit

Below is the standard configuration of piling mud recycling system with treating capacity of 500GPM.
Model: GNMS500-D
Flow Rate: 500 gallons per minute
Cyclone Specs.: 1 pc 10” de-sanding cyclone made from 100% polyurethane
Screen Specs.: Shale shaker with up and down 2 layers screen with total screen area of 2.23m2
Feeding Pump: Mechanical seal type centrifuge pump of 50 HP used to feed mud to the de-sanding cyclone
Cut Point: Solids Removable down to 40 microns
Catching Tank: Under located catching tank for mud storage. The tank is equipped with lighting system and ladders for easy operation.
Electrical Control System: Explosion, water, and dusty proof electrical control panel with SIEMENS or Schneider components

GN also has the model of GNMS200-D and GNMS1000-D available and the treating capacity is separately 200GPM and 1000 GPM.
The advantage of this type mud recycling system is cost competitive. By connecting with storage tank and mud mixing hopper, this de-sanding unit could also be used in other kind of project like the small horizontal directional drilling, micro tunneling and water well drilling.

GN economic desander unit (1)

Economic Mud Recycling Unit Layout

GN recommends the layout of this economic mud recycling system:
1) Mud Pit
2) Submersible Slurry Pump
3) Mud Recycling System
4) Storage Tank
5) Outlet Pipe
6) Jet Mud Mixer.
GN Solids Control also offers submersible slurry pump, mud storage tank, as well as jet mud mixer per request.
GN is now on promoting this type economic mud recycling system, for more information, you may sent inquiry to sales@gnsolidscontrol.com

There is a cleaning Tank for GN500 GPM mud recycling system for Saudi Arabia HDD rig, the tank is divided into 3 compartment, 1# Shaker compartment, 2# De-sander compartment, 3# Mixing compartment.

Detailed process features of GN500 GPM mud recycling system for Saudi Arabia HDD rig

1) Continues feeding of dirty slurry from mud pit to Shale Shaker.

The GN100YZ100A-30 Submersible slurry pump feed slurry from mud pit to GNZS703E Shale Shaker at capacity of 528 GPM.Slurry pump is made from Cr26 Abrasion resistant Alloy which allow users to pump high solids content fluids.

GN500 GPM mud recycling system for HDD

GN500 GPM mud recycling system for HDD

2) Pre-screening of the returned mud using GNZS703E Shale Shaker for the GN500 GPM mud recycling system for Saudi Arabia HDD rig.

This shaker can handle a throughput of more than 528 USgpm and is designed to remove particles down to 250 microns(60mesh) @ 7G force linear motion GNZS703E Shale Shaker with big screen area (2.63 ㎡)

3) Secondary and third cleaning of the returned mud using a GNZJ703E (10″×1 + 4″ × 8) Mud Cleaner.

1# GNSB5×4A-13J Centrifugal pump feed mud from 1# Shaker compartment to feed 10″×1 de-sander cones, where the particles larger than 50 microns are separated out by centrifugal force from desander cone nipple, and get down to GNZJ703E mud cleaner bottom shaker with a finer screen (150/200mesh) which again produces a virtually dry product. Major fluids with particle size less then 50microns goes to 2# De-sander compartment. This is the 2nd phase solids control of the GN500 GPM mud recycling system for Saudi Arabia HDD rig.

2# GNSB5×4A-13J Centrifugal pump suck mud from 2# desander compartment and feed to 4″x8 desilter cones. Where the particles larger then 16microns are separated out by centrifugal force from desilter cone nipple, and get down to GNZJ703E mud cleaner bottom shaker with a finer screen, which again produces a virtually dry product. Major fluids with particle size less than 16 microns goes to 3# Mixing compartment. This is the 3rd phase solids control of the GN500 GPM mud recycling system for Saudi Arabia HDD rig.

4) Integral mixing system using GNSLS35A-300 Jet Mud mixer for GN500 GPM mud recycling system for Saudi Arabia HDD rig.

This GN500 GPM mud recycling system for Saudi Arabia HDD rig allows fresh mud to be prepared very rapidly from bentonite powder. One of the 2 pumps on tank end is dedicated to this function allowing continuous mixing or recirculation as required.

GN500 GPM mud recycling system for HDD

GN500 GPM mud recycling system for HDD

5) Integral charge pumps to supply clean mud back to the drilling rig.

The mixing pump above is a dual function pump, on mixing pump outlet with a T pipe can be controlled by a valve to provide a continuous supply of clean mud from 3# mixing compartment under pressure to the high pressure mud pump, avoiding problems of starvation and cavitations which can rapidly cause damage.

Vortex mud hopper is an important part of drilling mud mixing system. It is used to mix new qualified mud for drilling rigs. The drilling mud vortex hopper usually used together with a centrifugal mixing pump or shear pump to realize the function.

votex mud hopper

vortex mud hopper

GN Mixing Hopper Technical Parameters

Model Pressure Inlet Outlet Weight Dimension: L×W×H
GNSLS45A 0.25~0.4Mpa 6 Inch 6 Inch 174Kg 1100×680×949mm
GNSLS35A 6 Inch 6 Inch 174Kg 1100×680×949mm
GNSLM25A 4 Inch 4 Inch 113Kg 850×570×851mm
GNSLM20A 4 Inch 4 Inch 113Kg 850×570×851mm

Applications of drilling mud vortex hopper

Normally, vortex mud hopper used together with centrifugal mixing pump, 1 vortex mud hopper + 1 mixing pump, or 2 vortex mud hopper + 2 mixing pump, it is called jet mud mixer. If it widely used in oil and gas drilling, HDD, CBM, micro tunneling, piling, water well drilling, etc…

While the vortex mud hopper combined with shearing hopper, it is a shearing mixing. It is used while there is fibrin in the injected chemicals. Shearing pump will cut the fibrin before enter into hopper for mixing.

Jet Mud Mixing System

jet mud mixer

Jet mud mixer

China manufacturer GN Solids Control offer the world with drilling mud jet mud mixing.We are an exporter of drilling fluid jet mud mixer for Indian, Russian,middle east.etc.We manufacture and design drilling bentonite mud mixer,drilling mud tank jet mixer.We supplied to Oilfield Company of the Turkey Venezuela, Indonesia, Russia, the United Arab Emirates,Turkey,and Morocco and Century Int’l Oilfield Equipments LLC of the United Arab Emirates etc.choose us as supplier.Our factory and company are Quality Management System ISO 9001-2000 certified.