Month: October 2026

We are excited to announce a major international delivery: 2 sets of GNLW363D-VFD decanter centrifuges, accompanied by 4 GN screw pumps, have been shipped to Argentina for a demanding solid control mud drilling project. This shipment highlights our ongoing commitment to providing high-performance drilling fluid management solutions to the South American oil and gas market.

The core of this delivery comprises the GNLW363D-VFD high-speed decanter centrifuges. Renowned in the industry, this 14-inch (360mm) bowl centrifuge is engineered for fine and ultra-fine solids separation, barite recovery, and drilling waste dewatering. The “VFD” (Variable Frequency Drive) configuration is a game-changer, allowing operators to seamlessly adjust bowl speeds (up to 3,200 RPM) and differential speeds. This flexibility ensures optimal separation performance across varying mud conditions, from water-based to oil-based drilling fluids.

To create a complete, efficient closed-loop system, the order also includes 4 GN screw pumps (likely from the GNG series). These positive displacement pumps are the ideal feeding solution for decanter centrifuges. They provide a steady, pulse-free flow without shearing the drilling mud, ensuring the centrifuge receives consistent feeding for maximum separation efficiency.

Argentina’s diverse drilling environments require robust and adaptable equipment. The GNLW363D-VFD is built to last, featuring a duplex stainless steel 2304 bowl and tungsten carbide tiles on the screw conveyor for exceptional wear resistance. The VFD control panel offers intelligent, real-time adjustments, enabling the crew to fine-tune the G-force (up to 2,062 G) to remove low-gravity solids as fine as 2–5 microns.

Paired with the GN screw pumps, the system guarantees smooth mud transfer. The screw pumps’ ability to handle high-viscosity fluids with suspended particles makes them perfectly suited for the harsh realities of mud drilling. Together, the centrifuges and pumps will significantly enhance the project’s solids control, reduce drilling fluid loss, and lower overall operational costs.

This shipment to Argentina underscores our growing footprint in South America. By delivering reliable, explosion-proof, and heavy-duty solid control equipment, we continue to support drilling contractors in achieving greater efficiency and environmental compliance. Whether for onshore or offshore applications, the combination of GNLW363D-VFD centrifuges and GN screw pumps represents a proven, world-class solution.

We look forward to seeing this equipment excel in the field and remain dedicated to powering the future of drilling with innovative separation technology

Five GNLW764-VFD large-bowl decanter centrifuge systems from GN Separation are now operating in an overseas tailings slurry separation project. The configuration follows a phased procurement process: after the first unit completed commissioning and performance verification, the client ordered four additional units of the same model, bringing the total to five complete systems. Each system integrates a GNLW764-VFD decanter centrifuge, a 6,000-liter automatic chemical dosing unit, and dedicated screw pumps, forming a continuous, automated separation train for tailings slurry.

The GNLW764-VFD is a large-bowl decanter centrifuge designed for high-load tailings duty. Its bowl measures 760 mm in diameter and 3,328 mm in length, giving a length-to-diameter ratio of approximately 4.38. Throughput ranges from 60 to 120 m³/h. The main drive motor is rated at 160 kW and the auxiliary motor at 90 kW, with a maximum separation factor of 3,000 G. The bowl is constructed from duplex stainless steel, and the scroll flights are hardfaced with tungsten carbide, a combination selected for corrosion resistance and wear life in slurries containing hard solids. A circulating oil lubrication system controls bearing temperature under sustained high-load operation, and the variable frequency drive allows operators to adjust bowl speed, differential speed, and pond depth to match feed conditions and target cake dryness. The unit is mounted on a vibration-isolated base and includes automatic lubrication and safety interlocks for unattended operation.

The project presented two sets of requirements that shaped the equipment configuration. The first was compliance with international tendering standards, which governed documentation, electrical specifications, and quality verification at each stage of manufacture and acceptance. The second was adaptation to high-altitude mining conditions, where reduced air density affects motor cooling and where temperature swings and dust load place additional demands on lubrication and control systems. Both requirements were addressed during design and commissioning rather than after delivery. The first unit served as the validation platform: its measured throughput, cake dryness, and solids recovery under actual site conditions established the basis for the client’s decision to standardize on the same model for the remaining four systems.

The five systems operate as a single treatment train. Tailings slurry is fed through the screw pumps to the dcanter ceentrifuges, where solid-liquid separation takes place; the automatic dosing unit prepares and injects flocculant upstream to improve clarification and throughput. The separated solids are discharged as a transportable cake, while the clarified liquid is directed to downstream reuse or discharge in accordance with local environmental requirements. This arrangement supports three outcomes simultaneously: volume reduction of the tailings stream, recovery of water for reuse in the mining process, and compliance with discharge limits. Automation of dosing and centrifuge control reduces the operator intervention required per unit of throughput, which matters in remote sites where skilled labor is limited.

The sequence from a single verified unit to a five-system installation reflects a procurement logic common in mining projects: performance is demonstrated at scale before capital is committed to full deployment. It also reflects the supplier’s capacity to deliver repeatable units within schedule, including the ancillary dosing and pumping equipment that determines whether the centrifuges perform as specified. The project combines high-standard tendering, customized engineering for plateau conditions, and multi-unit delivery into a single reference installation.

GN Separation has supplied solids control and separation equipment to projects in more than 70 countries, with subsidiaries or branches in the United States, Australia, and Russia. Its product range covers decanter centrifuge bowl diameters from 220 mm to 760 mm, along with shale shakers, desanders, desilters, mud tanks, and chemical dosing systems, allowing complete separation packages to be sourced from one supplier. In the tailings sector, the trend toward higher throughput, tighter water recovery, and verifiable environmental compliance favors equipment that can be configured as an integrated system rather than as standalone machines. The five-unit installation described here is a working example of that approach, and it provides a performance baseline for similar tailings projects in other regions.

GN Solids Control has completed the delivery of a comprehensive solids control package to an African drilling project. The shipment includes 10 units of GNLW453D-VFD large-bowl decanter centrifuges with support systems, 5 units of GNCD930G vertical cuttings dryer systems, 10 sets of screw pumps for feeding and flushing, and 10 units of screw conveyors.

The GNLW453D-VFD is a decanter centrifuge equipped with variable frequency drive. The large-bowl design increases separation area and retention time, which improves both processing capacity and the dryness of discharged solids. The VFD system allows stepless adjustment of bowl speed, enabling the centrifuge to operate in medium-speed mode for barite recovery or high-speed mode for fine solids removal. The bowl is made of duplex stainless steel 2205 or 2304, which offers better corrosion resistance and mechanical strength than standard SS304 or SS316L. Tungsten carbide inserts are used at the solids discharge ports and slurry distribution ports. These inserts are replaceable, extending service life under abrasive conditions. The screw conveyor inside the bowl is protected by tungsten carbide tiles. Bearings are SKF brand. The bowl and screw are dynamically balanced in three stages to minimize vibration at high rotational speeds.

Each GNLW453D-VFD unit is mounted on a telescopic skid. This design allows the centrifuge to be positioned independently or integrated with other solids control equipment. The feed pump can be a submersible slurry pump or a screw pump, depending on site layout and mud properties.

The GNCD930G is a vertical cuttings dryer designed to recover liquid from drilling cuttings. The internal air duct and mud separation structure have been optimized to increase throughput. The dryer uses centrifugal force and airflow to remove moisture from cuttings, reducing the liquid content in the discharged solids. This reduces the volume and weight of waste material that requires disposal. The GNCD930G undergoes full-load testing before shipment. In this project, the customer witnessed the test and confirmed the processing capacity and dryness of the discharged solids.

The 10 screw pumps serve as feed pumps for the centrifuges and as flushing pumps for the cuttings dryers and conveying lines. Screw pumps provide stable flow with low pulsation and can handle drilling mud with high solids content and varying viscosity. All pump parts are interchangeable with Mission pump components, which simplifies maintenance and spare parts management for the customer.

The 10 screw conveyors transport dried solids from the centrifuges and cuttings dryers to collection points. This creates a continuous, automated solids handling process and reduces manual intervention.

The equipment package is part of a repeat order from a long-term customer in Africa. The customer previously purchased solids control equipment from GN Solids Control and based the new order on satisfactory performance of the earlier units. Before delivery, the customer conducted an on-site inspection and full-load test of the GNLW453D-VFD centrifuge and the GNCD930G cuttings dryer. The customer approved the equipment after confirming the processing capacity and dryness met project requirements.

The combination of decanter centrifuges and vertical cuttings dryers addresses both mud recovery and waste minimization. The centrifuges separate fine solids from the liquid phase, allowing the cleaned liquid to be returned to the active mud system. The cuttings dryers further reduce the liquid content of the discharged solids. Together, these processes lower the volume of waste generated and reduce the environmental impact of drilling operations.

GN Solids Control has supplied solids control equipment to projects in more than 70 countries. The company manufactures centrifuges, cuttings dryers, shale shakers, desanders, desilters, vacuum degassers, mud mixers, and complete mud tank systems. The African project delivery includes documentation, spare parts, and technical support for installation and commissioning.