GN Decanter Centrifuge System for Africa Oilfield Waste Water Treatment

A complete package of a wastewater treatment centrifuge unit has been fully manufactured and is now ready for delivery to an oil and gas drilling project in Africa. This system is designed specifically to treat wastewater generated during drilling operations, where effective separation of ultra-fine solids is critical to meeting environmental discharge and reuse requirements. Oil and gas drilling wastewater typically contains fine particles, residual drilling fluids, and chemical additives, which require a high-performance dewatering solution with stable and continuous operation.

This centrifuge unit represents a high-standard wastewater dewatering system, engineered to handle ultra-fine solids from treated water streams with high separation efficiency. At the core of the system is a high-speed, large-bowl decanter centrifuge. The large bowl diameter and optimized bowl length provide an extended clarification area and higher centrifugal force, allowing the centrifuge to effectively remove very fine solids while maintaining high throughput and low moisture content in the discharged solids.

To ensure smooth and controlled feeding into the decanter centrifuge, the package is equipped with a matched feeding screw pump. The screw pump is specially selected for its ability to handle variable flow rates and abrasive slurry without causing excessive shear, ensuring stable operation and protecting both the pump and the centrifuge from premature wear.

The system also includes a complete chemical dosing unit, which allows precise injection of flocculants or other treatment chemicals into the wastewater stream. Proper chemical dosing enhances particle agglomeration, significantly improving the separation efficiency of ultra-fine solids and reducing the load on the centrifuge.

In addition, a clean water tank with a dedicated transfer pump is integrated into the package. The clarified water separated by the centrifuge can be collected, stored, and transferred for further treatment, reuse, or safe discharge in accordance with local environmental regulations.

All components of the centrifuge unit are mounted on a telescopic skid structure designed to support and secure the entire package. This skid-mounted design ensures ease of transportation, installation, and on-site integration, while providing structural stability during operation. The complete system reflects a reliable and efficient solution for wastewater treatment in oil and gas drilling fields.

16 Packages GN Solids Control Centrifuge for Offshore Drilling Company

Offshore drilling operations demand significantly higher standards in terms of material grade selection, mechanical design, surface treatment, and painting processes. Equipment used in offshore environments must withstand harsh conditions such as high humidity, salt spray, continuous vibration, and strict safety and environmental requirements. As a result, every component—from structural materials to control systems—must be carefully engineered, manufactured, and tested to ensure long-term reliability and stable performance.

GN Solids Control is a professional manufacturer and solution provider specializing in solids control equipment for offshore drilling mud treatment systems. With extensive experience in both onshore and offshore projects, GN fully understands the stringent technical and quality requirements imposed by offshore operators and classification standards. From the initial design stage through fabrication, assembly, painting, and final inspection, all processes are strictly controlled to meet offshore application standards.

Recently, GN Solids Control successfully completed the manufacturing of 16 sets of high-speed decanter centrifuges for a leading offshore drilling company. These centrifuges are designed specifically for offshore drilling mud treatment, where high separation efficiency, compact footprint, and reliable continuous operation are critical. The equipment adopts high-grade materials and reinforced structural design to ensure durability and corrosion resistance in marine environments.

 

Each centrifuge package is delivered as a complete and integrated unit. The scope of supply includes the high-speed decanter centrifuge, a matched feeding pump, a small holding tank, and an integrated control panel. This skid-mounted and modular design allows for easier installation, commissioning, and operation on offshore platforms or drilling vessels, where space is limited and installation time is critical.

The integrated control panel enables centralized monitoring and control of the centrifuge system, improving operational safety and efficiency. All electrical and control components are selected to comply with offshore standards and are properly protected to ensure stable operation under demanding conditions.

By delivering these 16 complete centrifuge packages, GN Solids Control once again demonstrates its strong manufacturing capability, strict quality control system, and commitment to providing reliable solids control solutions for offshore drilling operations worldwide.

2 Sets 1000GPM HDD mud cleaning system for Australia Customer

Horizontal Directional Drilling (HDD) is a widely used trenchless construction method for installing underground pipelines, cables, and utilities with minimal disturbance to the surface. This technology is especially advantageous in urban areas, river crossings, road crossings, and environmentally sensitive zones. During HDD operations, drilling mud plays a critical role by lubricating the drill bit, stabilizing the borehole, suspending and transporting drilled cuttings, and maintaining overall drilling efficiency. Effective management and recycling of drilling mud are therefore essential to ensure safe, economical, and environmentally responsible HDD operations.

An HDD mud recycling system significantly enhances operational efficiency and sustainability by continuously cleaning and reusing drilling fluid. Through a combination of solids control separation equipment—such as shale shakers, desanders, desilters, mud cleaners, and mud tanks—the system removes drilled solids of various particle sizes while maintaining optimal mud properties, including viscosity and density. This process reduces fresh water and chemical consumption, minimizes waste disposal volumes, lowers overall project costs, and helps prevent environmental contamination. As a result, a reliable mud recycling system is a critical component of modern HDD projects.

GN Solids Control is capable of designing, manufacturing, and supplying drilling mud cleaning and recycling systems in various sizes and configurations to suit HDD and other trenchless applications. The systems are engineered to meet different flow rate requirements, geological conditions, and local environmental regulations, while ensuring high separation efficiency and operational reliability.

Recently, GN Solids Control delivered two (2) sets of customized no-dig mud cleaning systems for an Australian client. Each system is designed with a handling capacity of 1000 GPM (approximately 240 m³/h), suitable for large-diameter and long-distance HDD projects. The systems are equipped with the following major separation and support equipment:

Two (2) sets of double-deck shale shakers, providing high fluid handling capacity and efficient coarse solids removal.

Two (2) units of 10-inch desander cone assemblies mounted on top of the shale shakers, designed for solids separation with a cut point of approximately 47 microns.

Ten (10) units of 4-inch desilter cone assemblies installed on the second double-deck shale shaker for fine solids separation with a cut point of approximately 27 microns.

Two (2) centrifugal feed pumps to supply slurry to the desander and desilter units.

One (1) centrifugal mixing pump with a 6-inch mixing hopper for preparing fresh, qualified drilling mud.

Complete auxiliary equipment including mud agitators, mud guns, an 11.5 m³ mud tank, and an integrated electrical control system for centralized operation.

This customized HDD mud recycling system ensures efficient solids removal, stable mud performance, reduced environmental impact, and reliable operation throughout the drilling process.

GN Decanter Centrifuge and Cuttings Dryer for Africa Drilling Company

Vertical cuttings dryers and decanter centrifuges are core processing equipment used downstream of the drilling mud solids control system. After the shale shakers, desanders, desilters, and mud cleaners separate the coarse and medium solids from the drilling fluid, a significant amount of fine solids and liquid remains trapped in the drill cuttings. To meet environmental regulations, reduce drilling waste volume, and recover valuable drilling fluid, further treatment of these drill cuttings is required. Vertical cuttings dryers, together with high-speed and low-speed decanter centrifuges, play a critical role in achieving this objective.

The vertical cuttings dryer is primarily designed to treat drill cuttings discharged from shale shakers when drilling with oil-based or synthetic-based mud. By utilizing high-speed centrifugal force, the dryer effectively removes residual liquid from the cuttings, significantly reducing oil-on-cuttings (OOC) and producing drier solids suitable for disposal or further handling.

Meanwhile, decanter centrifuges are used to process the liquid phase recovered from the dryer, as well as overflow from the solids control system, enabling fine solids separation and efficient recovery of drilling fluids. High-speed centrifuges focus on ultra-fine solids removal, while low-speed centrifuges are applied for barite recovery and density control, ensuring optimal mud performance and cost efficiency.

GN Solids Control offers a complete range of high-quality vertical cuttings dryers and decanter centrifuges designed to meet the diverse technical, operational, and regulatory requirements of different markets worldwide. The equipment is engineered with robust mechanical design, wear-resistant materials, and reliable control systems to ensure stable operation in harsh drilling environments.

Recently, GN Solids Control successfully delivered one (1) vertical cuttings dryer model GNCD930G and two (2) variable-speed decanter centrifuges model GNLW363D-VFD to an African drilling company. The decanter centrifuges are equipped with electrical variable frequency drives (VFD), allowing precise adjustment of bowl speed and conveyor differential speed. This flexibility enables the centrifuges to adapt to various applications, including fine solids removal, barite recovery, and fluid clarification, under different mud types and operating conditions. The supplied system provides efficient cuttings treatment, reduced environmental impact, and improved overall drilling fluid management for the project.

 

Shale Shaker and Vacuum Degasser for 2000HP drilling rig to Europe

GN Solids Control has supplied a comprehensive suite of drilling mud solids control equipment to a European client for their 2000hp oil and gas drilling rig. This complete package is engineered to ensure efficient and reliable mud processing, which is critical for optimal rig performance.

GN Solids Control has supplied a comprehensive suite of drilling mud solids control equipment to a European client for their 2000hp oil and gas drilling rig. This complete package is engineered to ensure efficient and reliable mud processing, which is critical for optimal rig performance.

The foundation of the system is the GNZS594K High G-Force Linear Motion Shale Shaker. As the primary and most critical separation unit, its adjustable G-force offers operational versatility—delivering up to 7.5G for standard drilling mud processing and an increased 8.0G for more effective drilled cuttings treatment, ensuring optimal primary solids removal.

For advanced, multi-stage fine solids control, the system features the GNZJ594K-3S16N Mud Cleaner. This unit combines a GNZS594K shale shaker with a hydrocyclone battery comprising three 10-inch desander cones and sixteen 4-inch desilter cones. Positioned directly after the primary shakers, it meticulously removes medium and fine silt-sized particles, significantly lowering the mud’s solids content and colloidal fraction.

To maintain mud density and prevent pump cavitation, a GNZCQ360 Vacuum Degasser is integrated into the flow line. Capable of handling up to 1500 GPM, it efficiently strips entrained gases (such as methane or H₂S) from the mud after it passes through the preceding solids removal equipment.

The final polishing stage is achieved with the GNLW363D High-Speed Decanter Centrifuge. This critical unit performs two key functions: barite recovery to minimize costly weight material losses, and the removal of ultra-fine, low-gravity solids that cannot be separated by other equipment. This ensures the mud maintains its desired rheological and density properties for optimal drilling performance.

Beyond supplying this suite of processing equipment, GN Solids Control provides comprehensive full-package mud system integration capability. This includes the design and manufacture of mud tanks, the central electrical control system, all ancillary mixing and agitation units, and the complete interconnecting pipeline network—delivering a fully operational, turnkey solids control system tailored to the client’s specific rig and operational requirements.

GN Drilling Cuttings dryer and High G drying shaker for Middle East Customer

High-G drying shakers are the primary solids-control equipment used for processing water-based drilling mud. Their main function is to efficiently remove large volumes of liquid and fine solids from drill cuttings, ensuring that the drilling mud is recovered and maintained at the proper properties for reuse. By generating extremely high vibration forces, High-G shakers significantly improve the drying performance of drilled cuttings, reducing the moisture content and maximizing mud recovery.

For oil-based drilling mud, however, the most effective solution is the vertical cuttings dryer. As a key separation unit in oil-based cuttings management, the vertical cuttings dryer is specifically engineered to extract oil from the drilled solids. GN Solids Control’s GNCD930G vertical cuttings dryer is designed to achieve an Oil on Cuttings (OOC) level as low as 3%–5%, meeting stringent environmental standards while allowing valuable oil-based mud to be reclaimed and returned to the drilling system. This not only reduces waste volume and disposal cost but also significantly lowers drilling fluid consumption.

Recently, a complete package of drilling waste management equipment—including three sets of High-G drying shakers GNZS594K and two sets of vertical cuttings dryers GNCD930G—finished production and factory commissioning at the GN Solids Control manufacturing facility. After passing all performance tests and quality inspections, the equipment was prepared for shipment to a client in the Middle East.

The GNZS594K High-G drying shaker features a large screening area, a robust dual-vibration motor design, and a high-G force output, enabling excellent separation efficiency for water-based mud. Meanwhile, the GNCD930G vertical cuttings dryer incorporates advanced balance technology, high rotational speed, and a durable screen basket structure, making it suitable for continuous and stable operation in demanding oil-based drilling environments.

This carefully assembled equipment package will support the client’s drilling waste management system by enhancing mud recovery, reducing environmental impact, and improving the overall efficiency of their drilling operations. GN Solids Control continues to supply reliable, high-performance solids control and waste management equipment to major international markets, including the Middle East, where operational requirements and environmental standards are among the most rigorous in the industry.

GNLW454GT Mud Dewatering Centrifuge for Hydrovac Slurry Treatment

Hydrovac slurry is the mixture of solids, liquids, and entrained air generated during hydro-vacuum excavation operations. This non-destructive excavation technique uses high-pressure water to loosen soils and a powerful vacuum system to extract the resulting slurry. It is widely used for safe and precise digging around existing underground utilities such as electrical cables, gas pipelines, fiber-optic lines, and water networks. The extracted slurry typically contains a high concentration of solids, including soil, sand, silt, clay, gravel, and fragmented rocks.  In industrial areas or contaminated sites, the hydrovac slurry may also contain hydrocarbons, chemical residues, or other forms of subsurface contamination. Due to its complex and highly variable composition, this slurry is often classified as industrial or controlled waste. As a result, it cannot be discharged directly into municipal drainage systems, open land, or water bodies. Proper handling, transportation, and treatment are required to ensure compliance with environmental regulations and to minimize impacts on local ecosystems and infrastructure.

To process this material effectively, the waste slurry must be transported to a specialized treatment facility where solid–liquid separation can be carried out. Typical treatment methods include the use of coarse separation equipment, vibrating screens, drying screens, decanter centrifuges, and chemical-enhanced dewatering systems. These processes reduce the moisture content of solids, recover reusable water, and minimize the total volume of waste requiring disposal.

GN Solids Control provides a complete equipment package for hydrovac slurry treatment. The system can be configured to handle various slurry characteristics and separation requirements. GN’s solution includes a primary coarse separation shale shaker, double-deck shale shakers for fine screening, large-bowl decanter centrifuges for high-efficiency solids separation, and fully automated dewatering systems for further moisture reduction. Supporting equipment such as mud tanks, agitation systems, and slurry transfer pumps are also integrated to ensure continuous and reliable operation. This comprehensive package enables hydrovac operators and waste management companies to process excavation slurry efficiently, reduce disposal costs, and meet environmental compliance standards.

8 Packages GN Jet Mud Mixing Hopper Unit for Europe Client

The European market generally requires more stringent certifications and compliance standards compared with many other regions. To meet these demands, GN Solids Control provides equipment fully certified with CE and ATEX, ensuring safety, reliability, and conformity with EU regulations. In markets such as Australia, the requirements are even more rigorous, often involving highly detailed specifications related to design, materials, and operational safety.

Different global markets also impose unique environmental or operational demands. For example, equipment supplied for projects in Siberia must be engineered to withstand extreme cold, including heavy insulation and frost-resistant components to ensure stable performance. In contrast, equipment used in the Middle East must be built to operate reliably in extremely high temperatures—often 55°C or more—requiring heat-resistant materials, enhanced cooling systems, and robust structural design.

Because every region has its own expectations regarding certification, engineering standards, and environmental suitability, it is essential for clients to clearly specify the final destination and working conditions of the equipment before receiving a quotation and placing an order. This ensures that GN Solids Control can design, certify, and manufacture equipment precisely aligned with the regulatory and operational requirements of the target market. With extensive international experience, GN is capable of delivering customized, compliant equipment for diverse global applications.

Recently, GN Solids Control successfully delivered eight jet mud mixing units to a European client. These units were engineered in full accordance with European standards and certification requirements. Each system is equipped with a jet mixing hopper and an 8×6×14 centrifugal pump powered by a 90 kW electric motor. This configuration ensures strong mixing capability, stable performance, and long service life, making it suitable for demanding drilling fluid preparation tasks.

GN Solids Control’s ability to meet varied market demands highlights its commitment to quality, safety, and customer-specific engineering across international projects.

K Series GN Shale Shaker for Middle East Oilfield Service Company

GN Solids Control Launches K-Version Shale Shaker — Enhanced Durability and Interchangeability.

In pursuit of continuous improvement in product quality, performance, and adaptability to diverse drilling rig conditions, GN Solids Control places strong emphasis on collecting and analyzing field feedback from global users and job sites. Every piece of practical experience helps GN enhance its equipment design and material standards, ensuring better durability and reliability under the most demanding drilling operations.

Over the past decade, many long-term clients have consistently chosen GN products. To maintain compatibility and minimize downtime, GN Solids Control ensures minimal changes in equipment footprint and spare part specifications between model generations. This strategy maximizes the interchangeability of parts, allowing customers to upgrade systems without major modifications. Whenever a significant design or material upgrade occurs, GN updates the product version number for easy tracking and identification.

The latest generation, known as the K-Version Shale Shaker, was officially introduced in early 2024 after extensive field testing at multiple job sites in China. Before any product launch, GN ensures sufficient on-site verification to validate new designs under real drilling conditions. The K-Version shaker features a robust mechanical structure, enhanced wear resistance, and lower maintenance requirements, helping users reduce both maintenance time and operational costs.

The new design also allows flexible configuration. By adjusting the mud feed box and optimizing G-force settings, the shaker can operate as a high-G drying shaker for efficient treatment of drilling cuttings. It is powered by 1.94 kW vibration motors, providing strong linear motion for effective solids separation.

Several sets of the K-Version shale shakers and GN centrifugal pumps are now ready for shipment to clients in the Middle East. These units will soon be commissioned on various drilling rigs, marking another milestone in GN Solids Control’s ongoing mission to deliver reliable, efficient, and field-proven solids control solutions for global oil, gas, and trenchless industries.

8 Packages GN Jet Mud Mixing Hopper Unit for Europe Client

The Jet Mud Mixer consists of a mixing hopper and a centrifugal pump mounted together on a compact general skid. The components are interconnected with pipelines and valves, forming a complete and user-friendly mixing package. The design enables quick installation, easy operation, and reliable performance in demanding field environments.

GN Solids Control has recently delivered 8 sets of Jet Mud Mixing Units, designed for efficient and continuous mud mixing operations at drilling sites. The Jet Mud Mixer is an essential component of the drilling mud system, ensuring the preparation of qualified drilling fluids that meet the requirements of modern drilling operations.

The unit is primarily used to mix and prepare drilling fluids by adding bentonite, barite, polymers, and other chemical additives into the drilling mud system. Through high-speed jet flow and strong shearing action, the unit ensures full dispersion of materials, producing a homogeneous and stable drilling mud that supports effective downhole operations and wellbore stability.

Depending on the rig layout and client preferences, GN provides two installation options. The Jet Mud Mixer can be integrated directly onto the drilling mud tank system, usually installed on the mixing tank, allowing convenient control and compact operation. Alternatively, it can be supplied as a separate skid-mounted unit, offering flexible mobility for multi-rig operations or locations with limited space on the mud tanks.

GN Solids Control manufactures a full range of Jet Mud Mixing Units with different flow capacities to match various rig sizes and mud system requirements. The mixing hoppers and centrifugal pumps are available in standard and customized configurations, built with wear-resistant materials for long service life and low maintenance.

With decades of experience in solids control and mud treatment equipment, GN Solids Control continues to provide reliable and efficient solutions that improve drilling performance and reduce operational costs for clients worldwide.