A string-supporting centralizer used in water plugging and water injection operation;

DL-V hydraulic water detection and water plugging string in one trip;

The application of compound water plugging and profile control technology of gel particle in Pingbei Oilfield;

Comprehension of water shutoff in oil wells and its technical keys;

Research and application of YH-103 composite water shutoff/sealing agent;

Organic low molecular of which can react with mineral ions in formation to create gel, although mineral ions exist in water, not in oil, so when water shutoff agent go into formation and encounter water, three coalescence states including colloidal dispersion gel and gel and precipitation will be generated, which depend on the content of .

Research on inorganic precipitator as water shut-off agent and profile modifier;

Research status of tri-axial swellable profile modification & water shut-off agent

Five oilfield tests of water shut-off showed that treatments to use an amphoteric ion polymer gel or an inorganic system of lime-cement as plugging agents could neither decrease water cut nor increase oil production.

Application of malisan in blocking against water and shaft strengthening;

This paper introduces a successful experiment in grounting blocking against water in coal bunker and surrounding rock grouting strengthening by Malisan and a suitable proportion of catalysts,which have got a good effect and ensured the regular production of coal mine.

This article introduced the process and notes on advance grouting and blocking against water of pump house.