Drilling mud aggravating agent: in some oil Wells, drilling Wells, general use of drilling mud, clay proportion of 25 or so, the proportion of water for 1, so the mud a small proportion, sometimes the mud weight can't and underground oil, gas pressure balance, would cause a blowout accident. In the underground pressure is higher, we need to raise the proportion of mud, to join the mud barite powder is to increase the proportion of effective measures of mud. Do with drilling mud barite generally fine degree to achieve more than 325 meshes, such as barite fineness vulnerable to precipitation is not enough. Drilling mud barite requirements with greater than 4.2 proportion, BaSO4 content not less than 95%, soluble salts is less than 1%.