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介绍了用于 １７８ｍｍ套管井的机械丢手堵水管柱及组成管柱配套工具的结构和工作原理，并简要地介绍了该项技术的试验效果。该项技术具有密封性能好，封堵寿命长，解封性能可靠等特点，基本满足了 １７８ｍｍ套管井封堵任意层的生产需要。
This paper introduces the structure and working principle of mechanical throw-away plugging pipe string and tooling kit for 178mm cased hole, and briefly introduces the test results of this technology. The technology has the characteristics of good sealing performance, long plugging life, reliable unwinding performance and the like, and basically meets the production needs of any layer of sealing of 178mm casing and well.