The air foam clockwise circulating and percussion drilling technology was practiced in the Africa that lacks water.It also got over the problem to drill in the very hard and leakage water rock.

• 应用空气泡沫正循环、气动潜孔锤钻进技术,实现了在非洲大陆严重缺水地区施工,克服了对坚硬岩石和漏失层钻进困难的问题。