According to the situation of drilling lost circulation in Zhongyuan Oilfield, a side hydraulic tool has been designed.
针对中原油田井漏的情况，设计了随钻防漏的侧向水力工具。
Its application shows that:(1)a"mall-made borehole wall"produced by the side hydraulic tool plays a role of leak protection in the absorbent formation;
侧向水力工具在现场的应用情况表明：（1 ）利用侧向水力工具形成“人造井壁”屏蔽环的方法，在渗漏地层能起到较好的防漏作用；
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