空气跟管钻进在南苏丹供水井流沙层中的应用实践

Application of Air Drilling with Casing in Quicksand Layer of South Sudan Water Supply Well

摘要:

在南苏丹供水井钻探施工过程中，遇特别松散的流沙层，常规的泥浆护壁钻进难以成孔。简要介绍了在南苏丹供水井施工现场制作简易同步回转拨杠实现空气跟管钻进的基本原理与工作程序，有效地解决了流沙层的钻进成孔问题。并针对这一技术应用过程中存在的问题，提出了改进建议。

Abstract:

During the drilling construction of water supply well in South Sudan, especially loose quicksand layer was encountered; it was difficult for hole drilling by conventional mud protection. This paper briefly explains the basic principle and working procedure of making the simple synchronous rotary shifter level on the water supply well construction site in South Sudan to realize the air drilling with casing and effectively solve the drilling problems in the quicksand. The improvement suggestions are put forward according to the existing problems in the application of this technology.