The result shows that,even with the optimum way,fluid leakage is serious if conducting sand cleaning with water;we suggest sand cleaning with foam of relatively low density,and foam sand-cleaning parameters are optimized through calculation.

Study on improving the permeability of soft coal seam with high pressure pulsed water jet;

The dffects of bubbles and jet-flow produced by fast-flowing water are affirmed to have deci-sive influences on tufa deposition.

Design and experimentation of high-pressure water jet set applied to incising coal seam in boreholes;

Device of mobile high-pressure water jet cleaning tube;

Stress wave effect in numerical simulation on rock breaking under high-pressure water jet;