Provide pin to avoid sealing at midway and protect seal part of packer, enhanced reliability of plugging string.
设计有防中途坐封的销钉，保护封隔器的密封件，提高了封堵管柱的可靠性。
The improved sealing cup-type plugging technology has remarkable social benefit and economic benefit.
改进后的皮碗式封堵技术经济效益和社会效益显著。
A new sealing cup has been developed, and the problems of gas leak and iron filings accumulation existing in former sealing cup-type plugging have been solved.
研究出新型皮碗，解决了原皮碗式封堵存在的燃气泄漏和积存铁屑问题。
It also has powerful core sealing capacity, drag coefficient was greater than 32, residual resistance factor was greater than 20 and plugging rate was greater than 95%.
具有较强的岩心封堵能力，阻力系数大于32，残余阻力系数大于20，封堵率大于95%。
The leakage plugging stopple with a hollow expansion bolt used for the support structure of the deep foundation pit comprises an expanding pipe, a hollow bolt, a nut, a sealing rubber mat and a cork;
该深基坑支护结构漏水空心膨胀螺栓封堵塞包括胀管、空心螺栓、螺母、密封胶垫和软木塞，空心螺栓套在胀管内且其长 度大于胀管长度；
One features: easy operation, excellent sealing, anti-vibration, no leakage, no distortion, no plugging.
一特点：操作便捷，密封性极好、抗振动、不渗漏、不变形、不堵管。
One features: easy operation, excellent sealing, anti-vibration, no leakage, no distortion, no plugging.
一特点：操作便捷，密封性极好、抗振动、不渗漏、不变形、不堵管。
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