Jet Mud mixer is special equipment to prepare and increase the drilling fluids weight by adding and mixing bentonite, change the fluid density, change the mud density, viscosity, and dehydration. The effect is more prominent matching with Shear Pump. Jet mud mixer is a unit used together with the solids control system for petroleum drilling and horizontal directional drilling(HDD). The unit includes one sand pump, one jet mixing hopper and one jet mixer that are installed in a base with pipe valves. It is safe and stable and can be moved conveniently. At the same time, we can make double spray mud mixer according to users requirement. It is designed by solid controlled bentonite mud mixer, drilling mud tank spray mixer.