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;

It has obvious actions of leakproof and lost circulation in low pressure absorbent formation because of containing a lot of foam with high shear force and high structural viscosity.

However, only the formation of cross-cutting plant fiber paper, there is a non-uniform density distribution, the surface is not smooth, highly absorbent and so on, can not be used in the printing.