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泥浆钻进时，由于泵压高，泥浆泵三通磨损、冲刷较严重，因此，三通故障多，修理十分频繁，消耗了大量时间。为此，我们设计了一种球阀式三通。1990年在某硫铁矿区，在倾角分别为76°和75°，孔深分别为425.39、370.03m的两个孔中试用，效果良好。这种三通具有体积小、重量轻、结构简单、加工方便、修理快、调节灵活、性能可靠、使用寿命长等特点。因此，深受大家欢迎。
When the mud is drilled, due to the high pump pressure, the mud pump three-way wear and erosion are serious. Therefore, the three-way fault is frequent and the repair is very frequent, which consumes a lot of time. For this purpose, we designed a ball valve type three-way. In a pyrite area in 1990, the experiment was conducted in two wells with inclinations of 76° and 75° and hole depths of 425.39 and 370.03 m, respectively. The three-way connection has the characteristics of small size, light weight, simple structure, convenient processing, quick repair, flexible adjustment, reliable performance and long service life. Therefore, it is very popular with everyone.