When drilling in some oil and gas wells, the proportion of drilling mud and clay is about 25, and the proportion of water is 1. Therefore, the proportion of mud is low. Sometimes the mud weight can not be balanced with the underground oil and gas pressure, resulting in blowout accidents. In the case of high underground pressure, it is necessary to increase the specific gravity of the mud. Adding barite powder to the mud is an effective measure to increase the specific gravity of the mud. Barite powder used for drilling mud usually has a fineness of over 325 meshes.