GN Solids Control, officially known as Hebei GN Solids Control Co., Ltd., has established a consistent export record for its trenchless mud recycling systems and TBM slurry separation equipment. The company supplies horizontal directional drilling (HDD) mud purification systems and tunnel boring machine (TBM) slurry treatment plants to overseas engineering contractors across Europe, the Middle East, Africa, and Asia. This article outlines the product scope, technical configuration, and market applications of these systems.

GN Solids Control is a national high-tech enterprise and has been recognized as a “Little Giant” enterprise by China’s Ministry of Industry and Information Technology. The company operates two manufacturing bases in China, with its headquarters in Langfang, Hebei Province, and a sales center in Beijing. Its U.S. brand, GN Solids America, supports North American and international customers. GN was the first Chinese manufacturer to develop and export mud cuttings dryers, and it maintains a global service network covering major trenchless construction markets.

For horizontal directional drilling projects, GN manufactures a range of mud recycling systems under its K, B, and C series. The K series provides economical configurations for basic mud purification. The B series offers higher integration and automation for mid-to-high-end projects. The C series is customized for specific overseas standards, including European CE and environmental requirements. Recent exports to Europe include two GNMS-400C units and one GNMS-200C unit, delivered to a trenchless engineering contractor.

Typical system models include the GNMS-200B, GNMS-400B, GNMS-500GPM, GNMS-600B, and GNMS-800B. Processing capacities range from 150 GPM (approximately 30 m³/h) to 1500 GPM (approximately 360 m³/h), with common configurations at 350 GPM, 500 GPM, and 1000 GPM. A standard HDD mud recycling system integrates a shale shaker for coarse solids removal, a desander and desilter cyclones for fine particle separation, and a decanter centrifuge for high-precision solid-liquid separation. Optional equipment includes high-G drying shakers and screw conveyors for cuttings dryness. The system enables closed-loop mud circulation, reducing fresh mud consumption and waste discharge.

In Egypt, GN has maintained a market presence since 2011. A long-term trenchless contractor recently purchased a Vermeer 400-ton drilling rig for an oil pipeline project and selected a GNMS-500GPM mud purification system to match the rig’s capacity. This repeat order reflects sustained customer confidence in GN’s equipment and after-sales support. In the Middle East, an HDD mud recycling system passed factory acceptance testing before shipment to a regional contractor. In Asia, GN supplied two GNMS-1500GPM slurry separation stations and one GNMS-200 mud recycling system for a large-scale trenchless project.

For tunnel boring machine projects, GN provides mud-water separation plants designed to handle large volumes of slurry with high solid content. The GNMS-1500GPM slurry separation station is a representative model, capable of processing up to 360 m³/h. These systems combine coarse screening, cyclone classification, and centrifuge dewatering to separate excavated solids from the slurry, allowing the cleaned fluid to be recirculated back to the TBM. The separated solids are discharged in a dry, handleable form, reducing transportation and disposal costs. This configuration is applicable to both slurry shield TBM and mix shield TBM operations

GN’s mud recycling and slurry separation systems share several design features that support overseas deployment. The equipment is modular and compact, facilitating containerized transport and rapid on-site assembly. Components are selected for compatibility with international electrical and safety standards. The systems accommodate varying mud compositions and flow rates, allowing configuration changes without major structural modification. GN’s in-house manufacturing covers key components including shale shakers, cyclones, and decanter centrifuges, which supports consistent quality control and spare parts availability.

For overseas engineering contractors, the primary value of these systems lies in cost reduction and regulatory compliance. By recovering and reusing drilling fluid, contractors decrease the purchase volume of fresh mud materials and reduce the volume of waste mud requiring disposal. This directly lowers project operating costs and helps meet environmental regulations in jurisdictions with strict discharge controls. The dried cuttings output further reduces waste handling and transport expenses.

GN provides selection consultation, installation guidance, commissioning support, and spare parts supply through its international service network. In established markets such as Egypt, long-term service relationships have contributed to repeat orders and referrals. For new customers, GN offers system customization based on drilling rig specifications, expected mud flow rates, and site conditions. Documentation and technical support are available in English and other languages as required.

GN Solids Control’s HDD mud recycling systems and TBM slurry separation systems have been delivered to engineering contractors in Europe, Africa, the Middle East, and Asia. The product range covers processing capacities from 150 GPM to 1500 GPM, with configurations adapted to different project scales and regulatory environments. The combination of modular design, in-house component manufacturing, and international service support positions GN as a practical equipment supplier for overseas trenchless and tunneling contractors seeking mud treatment solutions.