2 Sets GNMS-1000GPM Trailer Mounted Mud Recycling System for Middle East HDD Company

As one of leading brands for mud recycling systems in the world, GN Solids Control always set a new standard in this industry, for example, in a recent project, GN JUST shipped 2 sets of trailer mounted mud systems to Middle East, each of a 1000GPM capacity.

Horizontal Directional Drilling (HDD) is a widely adopted trenchless construction method for installing pipelines, communication cables and utility conduits beneath roads, rivers, railways and existing infrastructure without open excavation. Drilling mud (bentonite slurry) acts as the core working medium in HDD: it stabilizes the borehole wall, carries drill cuttings out of the bore, lubricates the drill string and reduces friction during pilot drilling and pullback. However, untreated return mud loaded with fine solids will degrade mud properties, accelerate wear on mud pumps and drill bits, increase bore collapse risk and generate large volumes of waste slurry. The trailer mounted mud recycling system, an integrated mobile solids-control package, is specially developed to address these pain points and has become standard supporting equipment for modern HDD projects ranging from small utility crossings to long-distance river-crossing pipelines.

1.Advantages of a tailer mounted mud recycling system: Different from fixed tank farms or skid-mounted mud systems that require cranes and flatbed trucks for relocation, the trailer mounted mud recycling system integrates shale shakers, desanders, desilters, slurry pumps, agitation tanks, mud mixing hoppers and control cabinets onto a highway-trailer chassis. This self-contained layout enables towing by standard trucks, rapid site positioning and hose connection within hours, eliminating heavy lifting work and greatly cutting mobilization and demobilization time. This mobility is highly valuable for HDD contractors that frequently shift between scattered urban utility sites, rural crossings and temporary working zones with limited access space.

2. core technical workflow: it follows staged solid-liquid separation. Return mud flowing back from the HDD bore first enters the shale shaker, where vibrating screens separate coarse cuttings above 74 μm. The underflow slurry then flows into the intermediate tank and is pressurized to hydrocyclone units. Desanders remove medium particles between 45–74 μm by centrifugal force, while desilters capture fine silt particles from 15–45 μm. After cyclone treatment, clean mud enters the active tank, where operators adjust density, viscosity and filtration loss by adding bentonite, polymers and water through the mixing unit. Qualified mud is pumped back into the HDD drill string to form a closed circulation loop. Separated solid cuttings are discharged onto a conveyor or collection bin for off-site disposal, which minimizes the volume of waste fluid and reduces landfill and transportation costs.