Regarding to the problems existent in present swabbing technology,based on theoretical research,an overload protection swab used for swabbing technology is designed and produced.

The casing swabbing is often used in low pressure,low permeability and low production rate oilfields for the most economical production.

Study on two-well pumping seepage flow in joint rock;

Analysis of pumping in saturated multi-layered soil by using displacement function method

Derived from the most outstanding characteristic of the effects which the grouting pressure has on grout diffusibility, this article poses a method, that suggests grouting and pumping are simultaneously applied, this method will be helpful to increase the grouting hydraulic gradient as well as expand the effective grout diffusivity rad.

The electricity-consumption to pump water is great in the Eastern Route Project of the South-to-North Water Diversion.

Based on conservation of mass,this paper deduced a theoretical model for land subsidence caused by construction loading on unconsolidated strata,and compared it with the elastic model for subsidence controlled by groundwater pumping.

Through an analysis of aquifer deformation machanism caused by groundwater pumping,the seepage flow equation with considering adynamic unit is deduced in this paper,and the mathematical model for the effect of aquifer deformation caused by groundwater pumping upon seepage field is presented.