When drilling some oil and gas wells, the specific gravity of the commonly used drilling mud or clay is around 2.5, while the specific gravity of water is 1. Therefore, the specific gravity of the mud is relatively low, and sometimes the weight of the mud cannot balance the underground oil and gas pressure, which may lead to a blowout accident. In cases of high underground pressure, it is necessary to increase the mud's specific gravity. Adding baryte powder to the mud is an effective measure to increase its specific gravity. For drilling mud, the baryte should generally be ground to a fineness of 325 mesh or finer. If the fineness of the baryte is insufficient, it may easily precipitate. Baryte used for drilling mud must have a specific gravity greater than 4.2, a BaSO4 content of no less than 95%, and soluble salts of less than 1%.