美国ActiSystems公司研制了一种全新的、在近平衡钻井中使用的“微泡”钻井液 ,又称为“Aphrons”钻井液。在没有充足的空气或注入气体的条件下 ,该钻井液可产生一种由多层粘膜包裹着的“Aphrons”所组成的“微泡” ,即非聚集、可循环使用的均匀刚性气核体系。它在使用时 ,不仅可以实现泥浆密度的还原 ,还能阻止或延缓钻井液进入地层 ,建立起一个真正的非侵入的、近平衡的环境 ,是钻定向井和水平井的理想钻井液。 ActiSystems of the United States has developed a new “microbubble” drilling fluid, also known as “Aphrons”, used in near-equilibrium drilling. In the absence of sufficient air or gas, the drilling fluid produces a “microbubble” of multi-layered mucosa-laden “Aphrons,” a non-aggregated, reusable uniform rigid gas core system . When in use, it can not only reduce the density of the mud, but also prevent or delay the drilling fluid entering the formation, creating a truly non-invasive and nearly balanced environment. It is an ideal drilling fluid for drilling directional wells and horizontal wells.