HDD, horizontal directional drilling, is a steerable trenchless method of installing underground pipes, conduits and cables in a shallow arc along a prescribed bore path by using a surface-launched drilling rig, with minimal impact on the surrounding area. HDD mud recycling system is a necessary part in the drilling process, using solids control equipments to seperate solids in mud, protecting drilling rig.  RuiLin Machinery's HDD mud recycling system is widely used in worldwide.

HDD mud recycling system always contains shale shaker, mud cleaner, centrifugal pumps, mud agitator, mud tank, jet mud mixer, submersible slurry pump, electric control system, lighting system, ladder, slide walk, handrail valve, pipe line, clean gate, etc.