新疆地质分局三大队二分队设计一种单动双管喷射式孔底反循环钻具。用该钻具钻进酥、脆、易破碎呈“粉末状”地层时，不仅保证岩矿心采取率达90％以上，而且能取出结构较完整的柱状岩矿心。同时，机械钻速比其他喷射式孔底反循环钻具提高一倍多。本文是根据该队的经验总结报告扼要编写而成。 Xinjiang Branch of the Third Branch of the Geological Branch of the design of a single-action double-jet jet bottom hole reverse circulation drilling. When drilling the crisp, crisp and fragile “powdery” strata with this drilling tool, it not only ensures that the rock and mineral core take rate is over 90%, but also can remove the more complete columnar rock core. At the same time, the ROP is more than double that of other jet bottomhole reverse circulation tools. This article is based on the team summary report prepared by the experience.