Engineering geological drilling and mineral exploration are important methods to obtain accurate subsurface geological data. The usual way is to use geological core drilling, use mechanical drilling equipment or tools to drill holes in rock layers or soil layers, and take out core and soil core samples to understand geological conditions or mineral conditions.

In the process of geological drilling, water or bentonite is usually used as drilling fluid. As environmental protection requirements are getting higher and higher, traditional mud pool settlement methods have been unable to meet the requirements of geological drilling mud treatment. For geological drilling mud, GN Solids Control has developed a complete set of processing equipment and solids removal unit for geological drilling mud and mining industry slurry treatment.

GN Solids Control has sold big quantity 9 inch mini size decanter centrifuge for mining industry in Canada, USA and Mexico. This weeks, some sets of 9 inch mini centrifuge is ready. After factory commissioning, they will be shipped to a Mexico client.

GNLW223 Series mini side decanter centrifuge is specially designed for high speed, small capacity, small footprint, fine solids separation. It is widely used together with mini size mud cleaner GNZS752 in solids removal unit.

GN Solids Control makes full package compact design solids removal unit for diamond drilling and mining industry. The major separation system of GN solids removal unit is mini size shale shaker and decanter centrifuge. There is a small mixing unit allocated together with the separation equipment. All equipment are controlled by the central control system and allocated on the small mud tank. There are ladders and guardrails around the tank and easy up stairs and down stairs during operation.

GN Solids removal unit is environmentally friendly. It can reach No-Pit drilling. It can reduce the solids weight and recycle the water phase for reuse. So it can reduced the water consumption.

The processing capacity of GN Solids removal unit is 0 ~ 150 LPM. The unit can reduced the drilling fluid consumption over 40% with Shaker, Centrifuge, Pumps, mixing unit, Tanks and Generators (Optional) .

Decanter centrifuge and disc centrifuge are widely used at oil sludge separation and waste water treatment. Especially in oil sludge separation system, decanter centrifuge and disc centrifuge are normally used together for 2-phase and 3-phase separation.

The decanter centrifuge is a kind of decanter discharge sedimentation centrifuge. After the liquid material enters into the decanter centrifuge via feeding pipe, the blades on the screw propeller push the solid phase in the material to the slag discharge port at the small end of the centrifuge bowl and discharge, and the liquid phase overflows through the overflow holes at the large end of the bowl. This process is repeated continuously to achieve the purpose of continuous separation.

Decanter centrifuge is widely used at drilling mud treatment solids control system and drilling waste management system. The decanter centrifuge can be used for barite recovery and fine solids separation.

A disc centrifuge is a type of vertical centrifuge. The bowl of the disc centrifuge is installed on the upper end of the vertical shaft, and is driven by a motor to rotate at a high speed through a transmission device. Inside the drum, there is a set of disc-shaped parts that are nested together, it is called discs.

Below are the two major application conditions for disc centrifuges:
1. Liquid-solid separation (ie, the separation of the bottom concentration suspension), called clarification.
2. Liquid-liquid separation (or liquid-liquid-solid) separation (ie separation of emulsion), called separation operation.

GN Solids Control makes various sizes of decanter centrifuge and disc centrifuge. And GN Solids Control can make customized centrifuges to suit for clients’ special demands.

Chemical dosing unit are widely used together with centrifuges for ultra fine solids dewatering treatment. Clients can choose liquid chemical or powder chemical, and sometimes clients need to use both liquid chemical and powder chemical to suit for the sludge situation. The GN Solids Control can offer skid mounted chemical dosing unit and containerized chemical dosing unit.

GN Solids Control has been established for more than 10 years, and has provided complete sets of solid and liquid separation equipment for customers in many countries, including the United States, Canada, Australia,Singapore, Malaysia, Egypt, UAE, Oman, Kuwait, Saudi, India, Indonesia, and so on. Weeks ago, GN Solid Control delivered a complete set of solid and liquid separation equipment for construction mud treatment to an Australian customer. It is not the first one liquid and solids separation unit GN Solids Control exported for Australia.

Australia has higher standard even than European market. There are many special request demanded from Australia clients. GN Solids Control exported over 10 complete sets of waste management system and slurry treatment unit to the market. Every unit is specially designed and made per clients’ request to suit for their demands and applications.

With the rapid development in recent years, the construction mud dewatering treatment system manufactured by GN Solid Control has helped customers successfully recover a large number of valuable materials, save a lot of water resources, improve customers’ economic benefits and meet the requirements of environmental protection.

The liquid and solids separation unit made for the Australia client including follow items:

1. Linear dewatering shale shaker

The linear motion shale shaker is used for dewatering treatment. It is specially designed to separate larger and coarser solid particles. The construction mud enters the shaker screen through the charging funnel to separate large-diameter solids such as large stones. The service life of the screen on this vibrating screen is longer than that of the traditional woven screen.

2. Double-deck mud shale shaker

The liquid phase come from the coarse separation dewateting shale shaker enters the double-layer mud shale shaker GNZS706 again. GNZS706 double-deck shale shaker is a two-stage separation, which enters the bottom layer of the double-layer vibrating screen first. The mesh number of the bottom layer is small, so as to further separate coarse particles. The mesh number of the upper screen is high, and the liquid phase passing through the lower screen enters the upper screen again, and the effect is better.

3. 3-1 desander and desilter mud cleaner. It is a combination of drilling mud shale shaker, desander and desilter separator.

4. Decanter centrifuge for fine solids separation.

5. Chemical dosing unit to using together with decanter centrifuge for dewatering treatment.

GN Solids Control can make automatic mud tank cleaning system for onshore and offshore applications. The automatic mud tank tank cleaning system is used together with high pressure wash gun. The high pressure wash gun is used to wash mud tanks, the automatic mud tank cleaning system is to separate the waste slurry and reuse the water to clean mud tanks again.

The normal design GN automatic tank cleaning system is mounted on a skid for easy movement. This week, GN Solids Control finished a customized tank cleaning system for offshore platform. Compared with onshore tank cleaning system, the unit for offshore is customized design, it is composed of separate small modular for easy lifting. Below are the major separation modular of the offshore automatic tank cleaning system.

1: Automatic high pressure wash gun modular to flush and clean mud tanks.

2: The suction unit to suck the waste slurry which is generated from tank cleaning.

3: Waste slurry separation modular to separate the liquid and solids inside the waste slurry.

4: The storage and transfer modular.

5: the solids skips to collect drill cuttings and transfer to other places. The solids skips are equipped with covers. There are rubber sealing on the covers. During shipment, the solids skips can be locked and sealed to avoid leakage. It is widely used for solids waste and hazardous material transfer.

Besides automatic mud tank tank cleaning system for onshore and offshore, GN Solids Control is also capable to make other waste management separation equipment, like waste water treatment unit for oil and non-oil slurry treatment.

GN Solids Control can also make drilling cuttings treatment system to make water base mud and oil base mud and cuttings. After separation, some clients may want to recover as more drilling mud as possible for reuse. Or they want to separate the liquid and solids and to reduce the total waste. According to clients separation demands, GN Solids Control will offer various solution.

GN Solids Control makes some customized high G drying shaker units for an offshore project. The high G drying shaker model is GNZS594F with 4 screen panels. The high G drying shaker are equipped with anti splash cover.

The anti splash drying shaker is installed on a small catch tank. There is a centrifugal pump installed on the tank skid to transfer mud to other tanks.

There are 2 mud agitators are installed on the mud tank to avoid mud settle down.

High G drying shaker is a kind of shale shaker which adapts G force to separate liquid and solids phase. GN Solids Control makes various sizes solids control shake shaker with G force up to 7.5G. GN Solids Control makes high G drying shale shaker which is with G force up to 8.0G. The G force of all GN shale shakers are adjustable.

The damping spring is important to shale shaker performance. It is used to reduce the vibration effect to the shaker mechanical parts. The normal material of damping spring is metal frame inside, and outside is covered with vulcanized rubbers.

There are totally 3 high G drying tank units for the same offshore project. It is designed and made per client’s request. GN Solids Control standard color is green RAL6024. And also the color of the whole unit is blue and white, it is specially made per client’s request.

GN Solids Control offers high quality composite frame pretension shaker screens for all GN shakers. Further more, GN Solids Control can make other sizes replacement screen for other brand shale shakers.

Shale shaker can be used together with various sizes and quantity of hydra cyclone assembly to work as mud cleaners.

Besides high G drying shale shaker, GN Solids Control can make other drilling waste management equipment, includes but not limited to vertical cuttings dryer, decanter centrifuge, dewatering unit, vacuum pump, screw conveyors, etc…

Degasser is a basic device in drilling mud solids control equipment. Degasser can quickly migrates bubbles to the surface of drilling fluid and removes them. Using degasser is the most effective way to remove gas from gas influx drilling fluid.

Degassers are divided into two categories: vacuum degasser and atmospheric centrifugal degasser. According to the way of vacuum formation, it can be divided into jet evacuation degasser and vacuum pump evacuation degasser.

As long as the structure is reasonable and the viscosity is normal, the degassing efficiency of the general degasser can reach 80% ~ 95%. The inlet pipeline of the degasser is installed behind the agitator of the second tank (close to the grit chamber). In this way, the large-diameter bubbles of 4 ~ 25mm can be removed by the agitator to facilitate the suction of the degasser. At the same time, the self-locking of the centrifugal sand pump used for the hydrocyclone can be avoided.

No matter what kind of vacuum degasser, its structure has the following three points in common:

1. There is a vacuum pump or jet pump to maintain a moderate vacuum in the degassing tank, so as to suck the gas invasion drilling fluid into the tank for gas-liquid separation and discharge the natural gas to the atmosphere

2. Grooved baffle or conical umbrella plate is generally set in the tank to separate the drilling fluid into thin layers to escape the gas.

3. Equipped with liquid level control device to adjust the flow of drilling fluid into the degassing chamber, so that the degassing chamber will neither overflow nor empty.

The improvement of vacuum degasser mainly focuses on the above aspects. Different structures form different types of products.

Mud gas separator is another device to remove the gas from drilling fluids. It is used after chokemanifolds and before shale shaker. It is a necessary safety device.

Dual tandem shale is completed with 2 shale shakers. For a dual tandem shale shaker, There are 2 shakers fixed on a skid, and the feeding box of the 2 shakers are connected by distribution box or distribution pipelines. There are valves on the distribution pipelines to control the mud flow to either one or both shakers.

Dual tandem shale shaker is widely used at workover drilling rig mud system. Compared with single shale shaker, the dual tantem shale shaker is easy for shipment and layout on the mud system. It is used to remove the drilling cuttings from drilling mud and get qualified drilling mud to support the drilling actives.

Drilling cuttings are the main solid phase polluting drilling fluid. It greatly affects the performance of drilling fluid and must be stabilized. Therefore, it is very importance to do solids control treatment during drilling process. Drilling fluids solid control is the process to control and remove drilling cuttings. The cost of drilling fluid is directly related to solid phase control and its effect.

Shale, sandstone (sand), limestone, dolomite salt and salt rock often encountered in drilling are low-density solids. Their drillability varies greatly, which plays an important role in the determination of drilling fluid system and the selection of solid control system.

After the solids control shale shaker, the desander and / or desilter mud cleaner will be used. It is to further separate finer drilling cuttings.

There are 4 steps solids control equipment: shale shaker, desander, desilter, and decanter centrifuge. Clients can choose the right model solids control equipment depends on the separate point of the equipment and the separation demands of the rig site.

Decanter centrifuge is the most expensive separation equipment on the solids control equipment. It is used to remove the ultra fine solids in the drilling mud.

Mud mixing hopper and mixing pump are used as mixing unit to prepare qualified drilling mud.

GN Solids Control is specialized in drilling mud solids control equipment, drilling waste management and replacement shaker screens for various shaker models.

Drilling waste and oil sludge treatment is the major products of GN Solids Control. Below is a simple introduction of the major separation equipment to treat drill mud and drill cuttings.

1) Vertical cuttings dryer is the major equipment to treat OBM (oil base mud) cuttings: It is also called as vortex centrifuge. Vertical cuttings dryer can reduce oil on cutting to 3% ~ 5%.

2) High G drying shale shaker is the major separation equipment to treat water base mud (WBM) cuttings.

3) High speed Decanter centrifuge is used after Vertical cuttings dryer to reduce the mud weight. 14 inch centrifuge is the most popular size used at oil field. Clients can select fixed speed control centrifuge for cost effective, and choose another set of pulley and belt for changing to another fixed speed. GN Solids Control is also capable to make variable frequency drive control (VFD) decanter centrifuge and full hydraulic drive (FHD) decanter centrifuge.

4) Screw conveyor is the most popular transfer device to feed for vertical cuttings dryer and high G drying shale shaker, and transfer the solids discharged from the separation device. GN Solids Control offers various diameter sizes and transfer length screw conveyors.

GN Solids Control can also offer different design full package OBM treatment unit to suit for various clients’ request. GN Solids Control will offer a question list about waste management to know more about clients’ job site situation. Then GN Solids Control will work out a suitable proposal for clients.

For OBM cuttings treatment, most clients will separate the drill cuttings, and recover the usable drilling mud from the cuttings. And resell the drilling mud. If only for one short time project, sometimes it is not economic to invest much for the 3-phase separation to separate oil and sell oil.

GN Solids Control is capacity to make solids control shale shaker and mud cleaner for onshore and offer drilling rigs. Recently, GN Solids Control finished a drilling fluids mud tank system for an offshore drilling company.

There are drilling fluids shale shaker and centrifugal pumps equipped in the offshore rig mud system. The shale shakers are used to treat the drilling fluids. There are some centrifugal pumps used for the mud system, some are used for transfer, some are used together with mixing hopper to prepare qualified new drilling mud.

According to the conditions generating vibration, the shaker shakers can be divided into four types:

1. Atmospheric shale shaker: the upper side and lower side of the shale shaker screens are atmospheric pressure. It is the most popular type shale shaker.

GN Solids Control makes single deck and double deck shale shaker. According to the screen quantity of single deck, GN Solids Control makes 2-panel mini. Shale shaker, 2-panel shale shaker, 4-panel shale shaker and 5-panel shale shaker.

2. Positive pressure shale shaker: the environment above the screen is greater than atmospheric pressure, and the environment below shaker screen is atmospheric pressure. It is not popular. Nearly not used for drilling mud treatment.

3. Negative pressure shale shaker: the upper side of the shaker screen is atmospheric pressure environment, and the bottom side of shaker screen is less than atmospheric pressure environment. It is also called as vacuum shaker screen. GN Solids Control makes screen vacuum unit to suit for his own brand shaker models. The vacuum unit is separated with shale shaker.

GN Solids Control vacuum screen unit is very compact design. It is suitable for both offshore rig drilling mud system and offshore drilling mud system. A vacuum unit can be connected to 1 shale shaker, 2 shale shakers, or maximum 3 shale shakers.

While the screen vacuum unit is working together with solids control shale shaker, it can replace the extra high G drying shale shaker at drilling waste management system.

Many clients have much interest on tank cleaning system. Clients want to know more actual process in the field for both water base slurry and and non-oil base mud on rig tanks.

Regarding the tank cleaning system, it is a basic and simple separation unit. GNTC-30C Automatic Tank Cleaning System is a closed loop system to continue clean the mud tanks, oil tanks, chemical tanks or slurry tanks. Clients can send materials to GN Solids Control factory for test. The major separation device is Inclined Plate Clarifiers (IPC).

GN Inclined Plate Clarifiers (IPC) is a high performance, Lamella plate design for removal of settleable solids in a variety of waste slurry. The lamella plate is made from stainless steel. It can be used to separate oil sludge or non-oil sludge.

The GNTC-30C Tank Cleaning system can supply fresh water to the high pressure tank cleaning machine which is mounted inside the tank. And the integrated pumps bring the dirty wash water back to the system for cleaning works and then return the clean water back to the tank cleaning machine for reuse.

It applies gravity separation. The liquid is not very clean.The final recovered liquid quality various per the raw material and the chemicals. Clients can choose suitable chemicals to help for the separation and help to improve the separation efficiency and quality.

It is designed for tank cleaning companies, who do not have high request on the liquid quality. They can use the recovered liquid to clean mud tanks again.

If clients want clean liquid after separation, the tank clean unit is not suitable. They can use centrifuge separation. GN Solids Control makes various sizes of decanter centrifuge frpm 9 inch, 14 inch, 18 inch to 22 inch and 30 inch. GN Solids Control also makes various types of chemical dosing unit. The chemical dosing unit and decanter centrifuge can be used together for dewatering treatment.