EURO-ECO 2006 Hanover 1 - 2 December 2006	Environmental and Engineering Aspects for sustainable living
	European Academy of Natural Sciences, Hanover European Scientific Society, Hanover Russian Academy of Natural Sciences, Moscow

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Abstracts EURO-ECO 2006

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A difficult process of chemical, mechanical and biological colmatage of the filtering zone in water wells needs application of different ways of its regeneration. In case when it is impossible to restore the permeability of filtering zone there is a need to drill the well again. During the drilling or regeneration process the danger for environment is appeared.

Densely populated and industrial areas which take an active part in the process of water withdrawal are subjected to ecological dangers.

The essential decrease of risk and the cost price of the process can be achieved by using the technology of cavitational dismudding of the holes.

This technology was developed to ensure the long-term work of the water wells due to the prevention of processes of accumulation and strengthening of the mud in the holes. It also permits to keep the optimal permeability of the filter zone automatically.

In developing of technology next facts was revealed and taken into account:

• mechanism of the colmatage of the filter zone of water wells with unstable substances which are contained in the ground water;
• regularity of the changes of specific power intensity in different ways of dismudding the filter zones of water wells with mud of different density;
• regularity of selective cavitational influence on the mud of different origin;
• features of controlling of the cavitational dismudding;
• conditions in which changes the direction of influence of hydrodynamic impulses from interstitial water to the rock skeleton and mud, promoting better destruction of their structural ties.

The characteristic property of technology is regeneration of filter and in-place permeability without taking out the lift pipe and the water pump from the hole. This technology can be used for prolongation the service life of oil-and-gas and geotechnological holes.