Month: September 2025

GN Solids Control is a Chinese company that has established itself as a global leader in the design, manufacturing, and service of equipment for solids control, drilling fluid purification, and drilling waste management.

This compact system for offshore platform mainly consists of 2 parts.

1. Mud Tank
2. Desilter

GN would design and build a Customized, Skid-Mounted Solids Control System that is pre-assembled and tested onshore for easy installation offshore.

1. Design and Layout

• Compact & Modular Design: GN uses 3D modeling to create a space-efficient layout that fits the platform’s specific footprint. The system is often built into multiple, interconnecting skids.

• Baffle System: Internal baffles are crucial offshore to dampen fluid surge (sloshing) caused by the vessel’s motion. This maintains stability and ensures consistent suction for the pumps.

• High-Efficiency Layout: The tank is divided into specific compartments that form a logical flow path for the drilling fluid:

  • Possum Belly / Shale Shaker Back Tank: Receives fluid directly from the flow line.

  • Settling Compartments: Allows for initial gravity separation.

  • Suction Compartments: Where the mud pumps draw clean fluid from.

  • Additive & Mixing Compartments: For treating and weighting up the fluid.

    GN Solids Control Desilters for Offshore Platforms
    GN offers robust desilter units specifically engineered for the harsh conditions of offshore operations. Key models often include the GNZJ Series.

    Key Components of a GN Offshore Desilter Unit:
    Hydrocyclones (The Core Component):

    Size: GN desilters typically use 4-inch or 5-inch hydrocyclones. A 4-inch cone is standard for fine silt removal.

    Lining: For offshore durability, the cones are often lined with polyurethane or other abrasion-resistant materials to withstand the constant erosion from fine, abrasive solids.

    Arrangement: Multiple cones (e.g., 8, 10, 12, or 16 per unit) are mounted on a single manifold to handle the high flow rates common in offshore drilling.

    Skid-Mounted & Compact Design:

    Offshore space is at a premium. GN designs its desilter units to be compact, modular, and skid-mounted for easy installation, integration, and movement on the rig.

    The unit is pre-assembled and tested onshore to minimize commissioning time offshore.

    Feed Pump:

    A dedicated, high-head centrifugal pump (often a GN brand pump) supplies pressurized drilling fluid to the hydrocyclone manifold. Proper pressure (typically ~75 psi / 0.52 MPa at the inlet) is critical for efficient separation.

    Shaker Deck (Integrated Mud Cleaner Option):

    Often, the desilter unit is mounted over a fine-mesh screen shale shaker. This combination is called a Mud Cleaner.

    The shaker processes the “underflow” (the waste slurry of fine solids and a small amount of liquid) from the hydrocyclones. This allows for the recovery of valuable liquid phase back into the active system, which is especially important with expensive oil-based or synthetic-based muds used offshore.

    For more case info, please find Michael.

  • Whatsapp: + 86 178 0179 9913
  • Email: michael@gnseparation.com/michael@gnsolidscontrol.com

GN Solids Control is a leading Chinese manufacturer and global supplier of solid-liquid separation equipment and systems, primarily serving the oil and gas drilling industry, as well as other industrial sectors like mining, tunneling, and environmental protection.

This system mainly consists of 4 modules.

1. Coarse Screen Module
2. Fine Screen Module
3. Desilter Module
4. Large Drum Decanter Centrifuge Module

A Coarse Screen Module is a standardized, pre-assembled unit that houses one or more Shale Shakers, which are the primary and first stage of solids control in drilling operations. Its main function is to remove the largest drilled solids (typically larger than 74 microns) from the drilling fluid as it returns from the wellbore.

Think of it as the “front door” for the returning drilling mud. It captures the big cuttings, protecting the downstream, more sensitive equipment from being clogged or damaged.

A Fine Screen Module is a standardized, pre-assembled unit that houses one or more fine-screen shale shakers. It is typically the second stage of primary solids control, designed to remove finer drilled solids that passed through the Coarse Screen Module.

If the Coarse Screen Module is the “coarse filter” that catches the big pieces, the Fine Screen Module is the “fine filter” that captures the smaller, abrasive sand and silt particles.

A Desilter Module is a standardized, pre-assembled unit that houses a bank of hydrocyclones called desilters. It is typically the fourth stage of solids control in the drilling fluid process, designed to remove very fine silt-sized particles that have passed through the previous equipment (shakers, degasser, and desander).

A Big Bowl Decanter Centrifuge, often simply called a high-volume centrifuge or large-capacity centrifuge, is a critical piece of solids control equipment used for the fineest and most efficient separation of solids from drilling fluids. It represents a significant step up in processing capability from shale shakers and hydrocyclones.

It is called “Big Bowl” because it features a larger diameter rotating cylinder (the bowl) and, typically, a longer length compared to standard decanter centrifuges. This larger internal volume allows it to handle very high flow rates and separate extremely fine particles.

For more case info in detail,please find Manager Michael by whatsapp for a prompt response.

Whatsapp: + 86 178 0179 9913

Email:michael@gnseparation.com

GN Solids Control is a Chinese company that specializes in the design, manufacturing, and service support of solids control equipment and waste management systems primarily for the oil and gas drilling industry. They are also a major player in the HDD (Horizontal Directional Drilling) and CBM (Coal Bed Methane) sectors.

The company is known for providing integrated solutions to separate solids from drilling fluid (mud), which is critical for efficient drilling operations, environmental protection, and cost reduction.

Key Products and Solutions
GN’s product line covers the entire solids control process, often referred to as the “mud system” or “mud tank system.” Their main equipment includes:

Shale Shakers: The primary and first stage of solids control. They use vibrating screens to remove large drill cuttings from the drilling fluid. GN offers various models, including linear motion and balanced elliptical motion shakers.

Vacuum Degassers: Used to remove entrained gases (like methane or hydrogen sulfide) from the drilling fluid, which is crucial for maintaining mud density and preventing kicks or blowouts.

Desanders & Desilters: Hydrocyclones that serve as the second and third stages of solids control. They remove finer sand and silt-sized particles that the shaker cannot capture.

Decanter Centrifuges: The fourth stage of solids control. These high-speed centrifuges separate ultra-fine particles and are also used for barite recovery (saving expensive weighting material).

Centrifugal Pumps: Used throughout the system to move drilling fluid between different pieces of equipment.

Mud Tanks & Agitators: Custom-designed tanks that hold the drilling fluid, with agitators to keep the fluid homogenous and prevent settling.

Complete Systems: GN integrates all this equipment into a single, skidded or trailer-mounted system, such as:

Mud Cleaning System: Typically includes shakers, degassers, desanders, and desilters.

Complete Solids Control System: Includes all the above plus centrifuges.

Slurry Separation System: For construction and piling projects.

Waste Management Units: Such as cuttings dryers and screw pumps for handling drill cuttings.

For more cases info in detail,find Michael to have a prompt reply.

Whatsapp: + 86 178 0179 9913

Email: michael@gnsolidscontrol.com/michael@gnseparation.com

GN Solids Control is a Chinese manufacturer and global supplier of comprehensive solids control and drilling waste management equipment. The company has grown to become one of the world’s leading providers of equipment for the oil & gas drilling, HDD (Horizontal Directional Drilling), CBM (Coal Bed Methane), and environmental industries.

Their core expertise lies in separating solids from drilling fluid (mud) and managing the resulting waste, which is critical for efficient, safe, and environmentally compliant drilling operations.

Core Products and Solutions
GN’s product line covers the entire process from primary separation to final waste handling. Their key equipment includes:

Shale Shakers: The first line of defense in solids control. GN offers a wide range of shakers, including linear motion and balanced elliptical motion models for different drilling conditions (e.g., fine screen shakers for high-volume liquid separation).

Vacuum Degassers: Used to remove dangerous and destructive entrained gases (like H₂S and CH₄) from the drilling fluid.

Desanders & Desilters: Hydrocyclones that remove fine, abrasive solids (silt and sand) from the mud. Desanders typically handle larger particles (≥ 45 microns), while desilters handle finer ones (≥ 15-25 microns).

Decanter Centrifuges: Critical for recovering barite and removing ultra-fine solids. They offer both high-speed centrifuges (for weighted mud) and large-bowl centrifuges (for unweighted mud).

Centrifugal Pumps: GN manufactures robust sand pumps and mud pumps to move fluid through the entire system.

Key Features and Strengths
Global Presence: GN has a significant international footprint with offices and subsidiaries in key locations like the USA (Houston), Russia, Middle East, and Southeast Asia, supported by a network of local agents and partners. This ensures strong after-sales service and technical support.

Full Product Range: They are a one-stop shop, capable of supplying everything from a single replacement pump to a fully automated, custom-built solids control system.

Focus on R&D: GN invests heavily in research and development to improve the efficiency, reliability, and environmental performance of their equipment.

For more cases detail,find MichaelSong for a prompt reply.

Whatsapp: + 86 178 0179 9913

Email: michael@gnseparation.com/michael@gnsolidscontrol.com

 

Overview of GN Solids Control Co., Ltd.

GN Solids Control is a Chinese company that specializes in the design, manufacturing, and distribution of solids control equipment and waste management systems for the oil & gas drilling, HDD (Horizontal Directional Drilling), CBM (Coal Bed Methane), and environmental industries.

A GN Agitator is a motor-driven mechanical mixer installed in drilling fluid tanks (mud pits) to keep the fluid homogeneous and prevent its components from settling. Its primary purpose is to maintain a uniform consistency in the drilling mud, ensuring that solids (like barite, the weighting material) do not settle out and that all additives are properly suspended.

---

1. Key Functions and Importance

In a drilling operation, drilling mud is a critical and complex mixture. If left stagnant, its components will separate, leading to severe operational issues:

• Prevents Solids Settlement: Keeps heavy weighting materials (Barite, Hematite) and drilled cuttings in suspension.

• Maintains Mud Uniformity: Ensures the mud properties (density, viscosity) are consistent throughout the tank, which is crucial for accurate measurement and control.

• Aids in Mixing: Helps incorporate new additives (polymers, chemicals) into the fluid system efficiently.

• Avoids “Dead Zones”: Eliminates stagnant areas in the tank where solids can accumulate and solidify, which are very difficult to remix later.

Without effective agitation, the mud becomes inconsistent, leading to poor wellbore stability, inaccurate mud readings, and potential loss of circulation.

---

2. Design and Construction Features (Why GN Agitators Stand Out)

GN agitators are known for their robust and practical design, built for the harsh conditions of drilling rigs.

• Heavy-Duty Gearbox: The heart of the agitator. GN uses a high-torque, helical gearbox designed for smooth operation, high efficiency, and long service life. It is typically filled with high-quality lubricant for maintenance-free operation.

• Robust Impeller (Propeller): The impeller is designed to create a strong axial flow pattern (top-to-bottom circulation) rather than just a vortex. This ensures the entire content of the tank, from top to bottom, is moving. They are often made from abrasion-resistant materials or coated with rubber to withstand the abrasive nature of drilling fluids.

• Structural Steel Construction: The main frame, shaft, and mounting base are built from high-strength steel to handle constant vibration and load.

• Explosion-Proof Motor: GN offers motors certified for hazardous areas (e.g., Ex d, Ex e standards), which is a critical safety requirement on oil and gas rigs where flammable gases may be present.

• Customizable Shaft Length: The shaft connecting the gearbox to the impeller can be customized to fit the specific depth of the customer’s mud tank.

• Effective Sealing System: A high-quality mechanical seal prevents drilling fluid from entering the gearbox, which is vital for preventing failure.

---

3. How It Works

The operation is straightforward but effective:

1. The explosion-proof electric motor provides power.

2. The motor turns the input shaft of the heavy-duty gearbox.

3. The gearbox reduces the speed and significantly increases the torque output.

4. This high-torque, low-speed rotation drives the long shaft and the impeller submerged in the mud.

5. The specially designed impeller pushes the fluid axially and radially, creating a controlled, powerful flow that ensures total tank movement and prevents any solids from settling.

---

4. Common Applications

• Main Active Tanks: Agitating the primary drilling fluid before it is pumped downhole.

• Suction Tanks: Ensuring the pump receives fluid of consistent density.

• Mixing Tanks: Where new mud is built or chemicals are added.

• Weighting Material Tanks (e.g., Barite Tanks): Preventing the extremely dense barite from settling into a solid, unusable mass.

For the cases details, please find MichaelSong below to have a prompt response.

Whatsapp: + 86 178 0179 9913

Email: michael@gnsolidscontrol.com/michael@gnseparation.com