Microwave heating machine is used for extruding and drying the filtrate reducer for petroleum drilling fluid. There is a synthetic method of modified starch that was used as filtrate reducer for petroleum drilling fluid. Our microwave machine is able to quickly dry high moisture content of fluids as well as convert the liquid to solid which is further used to mill powder. The milling powder easily solve in water to forms a high quality drilling fluid.

There are some advantages of extrusion-drying methods including simple process, non-pollution, low energy consumption, excellent filtrate reduction etc.