可直接加到各种水基钻井液体系中，很快分散，渗入地层的微裂缝并在井壁形成涂敷层，从而起到封堵、防塌和润滑作用,可根据地层温度不同,使用软化点为50-140℃的沥青原料。
       It can be directly added into a variety of water-based drilling fluid system, and it can be quickly dispersed. It can infiltrate into formation micro-cracks of the wellbore and the form coating layer, so as to play the role of sealing, anti collapse and lubrication. Asphalt with soften point from 50 to 140℃ can be used according to different formation temperature