The pulsed water cannon which is a new and effective hydrodynamic rock-breaking device, will find a wide application.

In order to optimize design and establish a study foundation for outside flow-field,computational models for solving pressure,velocity of water column and friction force in the launch pipe of pulsed anti-riots water cannon are established.

Mechanisms and tests for hydraulic pulsed cavitating jet assisted drilling;

Design and experiment on hydraulic pulse vibration generator for cementing;

High-pressure hydraulic pulse is effective to deal with some engineering problems such as hydraulic breaking rock and cutting metals.

Based on fine de-scription of residual oil distribution,well pattern adjust-ment and pulse water injection were performed in Block7in Gudong oilfield to enlarge swept volume,to tap residual oil potential in low permeability zone,to reduce the area of region of bypassed oil and to improve utiliza-tion fact.